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| v2. 6 10/09/27 1 es51967 6,600 counts auto dmm features ? 6,600 counts lcd display ? 100l qfp package ? 3v dc power supply ? conversion rate : 3 times/s ? full automatic measurement *voltage measurement: 660.0mv C 1000v *current measurement: a/ma/a *resistance measurement: 660.0 C 66.00m *capacitance measurem ent: 6.600nf C 66.00mf(6.6sec) ( taiwan patent no.: 453443 ) *frequency counter: 660.0hz C 66.00mhz ? current modes for clamp meter with zero function ? duty cycle measurement: 10.0% C 94.9% (0.66sec) ? diode measurement ? continuity check ? 4 adp modes with external reference voltage and independent adp segment on lcd panel ? temperature mode with internal scale translation circuit from 0 c to 0 f ? push functions: *key function *range change function *relative function * zero function: dca for clampmeter only *v ahz function ( taiwan patent no.: 510502 ) *data hold function *max/min function *back light function ? high crest factor signal detection ( taiwan patent no.: 234661 ) ? band - gap reference voltage output ? ol/ul state indicator in adp modes. ? ce selection (dc/ ac 1010v, dc/ac 610v) ? serial data output (rs232 format) ? lcd segment check when power on ? auto power off (30min/15min) ? sleep state indicative signal output ? re - power on ? on - chip buzzer driver ? low battery detection for 3v or 9v battery description es51967 is a n integrated analog - to - digital converter (adc) with 6,600 counts lcd display, automatic range selection, and 3v dc power supply. automatic range selection is provided for voltage (ac/dc) measurement, resistance measurement, current measurement, capacitance measurement, and frequency counter. expensive and bulky mechanical range switches are not required. other features include relative value display, zero feature for dca clampmeter, vahz function, data holding, maximum and minimum value holding, duty cycle measurement, diode measurement, temperature measurement, continuity checking, low battery detection, auto power off, re - power on, backlight driver, buzzer driver and rs232 data output.
v 2. 6 10/09/27 2 application digital multimeter clamp meter thermometer pin assignm ent vahz max/min vst osc2 osc1 bkout r _ovh nc zero buzin or buzout annunc bp1 bp2 bp3 bp4 seg01 seg02 seg03 seg04 seg05 seg06 seg07 seg08 seg09 seg10 seg11 seg12 seg13 v+ cref+ cref - cint caz buff raz ivsh ivsl ovx ohmc ovh ovsg or1 vr5 vr4 vr3 vr2 test5 acvl acvh adi ado adohz vrh vr va + va - adp sgnd seg14 seg15 seg16 seg17 aposel bklit dshift rs232 freq sleep ohmc2 csh - csh+ ca+ ca - r1k r9k vbar vr1 ohmc1 rel hold range cesel bkset key slacdc fc5 fc4 fc3 fc2 fc1 lb at9 sdo c - c+ v - dgnd agnd agnd 5 10 15 20 25 30 50 45 40 35 80 75 70 65 60 55 85 90 95 100 es51967 cyrustek. com.tw v 2. 6 10/09/27 3 pin description pin no symbol type description 1 v+ o output of on - chip dc - dc converter. 2 cref+ i/o positive connection for reference capacitor. 3 cref - i/o negative connection for reference capacitor. 4 cint o integrator output. connect to integral capacitor 5 caz i auto - zero capacitor connection. 6 buff o buffer output pin. connect to integral resistor 7 raz o buffer output pin in high - speed mode. connect to high - speed integral resistor. 8 ivsh i high current measurement inpu t. 9 ivsl i low current measurement input 10 ovx i input high voltage for resistance measurement 11 ohmc o filter capacitor connection for resistance mode below 6.600m range. 12 ovh i output connection for resistance measurement 13 ovsg i sense low voltage for resistance measurement 14 or1 o reference resistor connection for 660.0 range 15 vr5 o voltage measurement 10000 attenuator(1000v) 16 vr4 o voltage measur ement 1000 attenuator(660.0v) 17 vr3 o voltage measurement 100 attenuator(66.00v) 18 vr2 o voltage measurement 10 attenuator(6.600v) 19 test5 i/o test pin 20 acvl o dc signal low input in acv/aca mode. connect to negative output of external ac to dc converter. 21 acvh o dc signal high input in acv/aca mode. connect to positive output of external ac to dc converter. 22 adi i negative input of internal ac to dc op amp. 23 ado o output of internal ac to dc op amp. 24 adohz i frequency input under vo ltage/current mode, offset to agnd. 25 vrh o output of band - gap voltage reference. typically C 1.2v 26 vr i reference input voltage connection. typically C 400mv 27 va + i for adp mode. de - integrating voltage positive input. the input should be higher than va - . 28 va - i for adp mode. de - integrating voltage negative input. the input should be lower than va+. 29 adp i measurement input in adp mode. 30 sgnd g signal ground. 31 ohmc1 o filter capacitor connection for resistance mode under 660.0k range. 32 vr1 i measurement input. 33 vbar i in capacitance mode, a compensation capacitor is connected. in temperature mode, it is used to control decimal point. in a or ma modes, pull to v - to disable the 2 or m 2 sign on lcd. 34 r9k o connect to a precise 9k resister for capacitor measurement. 35 r1k o connect to a precise 1k resister for capacitor measurement. 36 ca - i/o negative auto - zero capacitor connection for capacitor measurement 37 ca+ i/o positive auto - zero capacitor connection fo r capacitor measurement 38 csh+ o filter capacitor connection for resistance mode under 66.00m range. 39 csh - o filter capacitor connection for resistance mode under 66.00m range. 40 ohmc2 o filter capacitor connection for 6.600m range in resistance mode. 41 sleep o sleep mode indicator, asserts low in sleep mode. 42 freq i frequency counter input, offset v - /2 internally by the chip. 43 rs232 i assert low to enable serial data output. 44 dshift i pull to v - to have 0.01m resolution in 66.00m. pu ll to dgnd or keep it float will change the resolution to 66.0m. 45 bklit i back light function. pulse low to set bkout pin output. v 2. 6 10/09/27 4 46 aposel i auto power off idle time selection. 47 - 63 seg17 C seg01 o lcd segment line 01 C 17 64 bp4 o lcd backplane 4 65 bp3 o lcd backplane 3 66 bp2 o lcd backplane 2 67 bp1 o lcd backplane 1 68 annunc o square wave output at the backplane frequency, synchronized to bp1. annunc can be used to control display annunciator. connect a lcd segment to annunc to turn it on; connect an lcd segment to its backplane to turn it off. 69 buzout o outputs a 2khz audio frequency signal for driving piezoelectric buzzer when buzin is low. 70 or o ol/ul state indicator in adp modes. origin state is low(v - ), it goes to high(dgnd) o nly when the reading is over 6,600 counts. it comes back to low only when the reading is less than 600 counts. it will keep the state when the reading is between 600 and 6600 counts. 71 buzin i pull to v - to enable the buzout. 72 zero i pulse to v - to e nable zero function. 73 nc 74 r_ovh i pull to v - to allow protection resistance increasing at ovh path 75 bkout o if bklit function is enabled, this pin will change from C 3v to +3v for 60 sec. idle time(see bkset also), once press bklit pin again with in 60 sec, this pin will change back to C 3 v. 76 osc1 i crystal oscillator input connection 77 osc2 o crystal oscillator output connection 78 vst i set to v - to enable the auto range voltage mode to start from 660.0v range. 79 maxmin i pulse to v - to en able max/min function. 80 va h z i pulse to v - to enable vahz mode. 81 rel i pulse to v - to enable relative function. 82 hold i pulse to v - to enable hold function. 83 range i pulse to v - to enable manual mode and manual range selection. 84 cesel i ce selection feature control pin. 85 bkset i set to v - to change the backligh idle time from 60 sec. to 180 sec. 86 key i pulse to v - to change mode. in adp mode, if this pin is connected to v - , the buzzer output will be off when the adp input overflows. 8 7 slacdc i select initial state. please refer to page 14 88 fc5 i switch 5 for function selection. 89 fc4 i switch 4 for function selection. 90 fc3 i switch 3 for function selection. 91 fc2 i switch 2 for function selection. 92 fc1 i switch 1 for func tion selection. 93 l b at 9 i low battery configuration. if 3v battery is used, connect it to agnd. the default low - battery threshold voltage is C 2.3v. if 9v battery is used, the low battery annunciator is displayed when the voltage of this pin is less tha n vrh ( - 1.2v) 94 sdo o rs232 compliant serial data output. 95 c+ o positive capacitor connection for on - chip dc - dc converter. 96 c - o negative capacitor connection for on - chip dc - dc converter. 97 v - p negative supply voltage. connecting to battery nega tive terminal. 98 dgnd p/g digital ground. connecting to battery positive terminal. 99 - 100 agnd p/g analog ground. v 2. 6 10/09/27 5 absolute maximum ratings characteristic rating supply voltage (v - to agnd) - 4v analog input voltage v - - 0.6 to v+ +0.6 v+ v+ (a gnd/dgnd+0.5v) agnd/dgnd agnd/dgnd (v - - 0.5v) digital input v - - 0.6 to dgnd +0.6 power dissipation. flat package 500mw operating temperature 0 to 70 storage temperature - 25 to 125 electrical characteristics ta=25 , v - = - 3v parameter symbol test condition min. typ. max units power supply v - - 3.5 - 3.0 - 2.2 v operating supply current in dcv mode i dd normal operation 1.9 2.2 ma i ss in sleep mode 2.5 5 a voltage roll - over error rev 10m in put resistor 0.1 %f.s 1 voltage nonlinearity nlv best case straight line 0.1 %f.s input leakage - 10 1 10 pa low battery flag voltage v - to agnd - 2.4 - 2.3 - 2.2 v zero input reading 10m input resistor - 000 000 +000 counts reference vol tage and open circuit voltage for 660 measurement v ref 100k resistor between vrh and agnd - 1.3 - 1.2 - 1.1 v peak to peak backplane drive voltage - 3.5v v - 2.2v 3.1 3.2 3.3 v counter time base period f osc = 4mhz 1 sec open circuit voltage for measurement (except 660 ) and continuity mode - 0.86 - 0.78 - 0.70 v internal pull - high to 0v current between v - pin and hold, range, key, fc1, fc2, fc3, fc4, fc5, bklit,maxmin 1.2 a between v - pin and rs232 11 internal pull - low to v - c urrent between gnd pin and slacdc 1.5 a ac frequency response at 6.600v range 1% 40 - 400 hz 5% 400 - 2000 reference voltage temperature coefficient tc rf 100k resister between vrh 0 v 2. 6 10/09/27 7 1.1.2 hcf signal detection es51967 provides detection of high - crest - factor (hcf) signal in acv mode. es51967 senses the signal and determines it as hcf if the vpp is large enough. once the signal is determined as hcf, es51967 will jump up one measuring range regardless of current measurement value. it takes 60ms to jump one rang e up. the jumping up process will continue until the maximum range is reached. with hcf detection, a more accurate result could be obtained. for example, when a input signal with vpp=300v, vrms=60v(cf=5) was applied, traditional dmm might stay at 66v range but shows counts with the amount of error up to 10% or even bigger. the error rises from limited input/output swing at internal adc. with hcf detection, dmm will stay at 660v range and exhibits more accurate results. in addition to accuracy improvement, hcf will speed up the measuring process for high voltage signals. for example, a 1000vrms is applied, es51967 will take about 180ms (3 hcf jumps) to enter 1000v range. and it takes 1 or 2 measuring processes to obtain the stable result. thus a stable lcd reading could be obtained within 1 sec. in determining whether the input signal is hcf, es51967 senses the signal at vr1 for fast response. however if a signal consists of a small ac part and a large enough dc part, es51967 might incorrectly treat it as h cf. this could incur range - looping phenomenon, i.e., the measurement could not settle to a specific range. when this phenomenon happens and keeps over 5 seconds, es51967 will change the ul level to 460 or lower counts (the default ul level is 500 counts). the measurement range will stay at the higher one mostly, so the range - looping phenomenon will not occur again. v 2. 6 10/09/27 8 1.1.3 the true rms - to - dc conversion with es636 if es636 is used for true rms - to - dc measurement, the test circuit is shown in figure 1. make ad o and adi pin short, and keep test5 pin float. connect ovsg pin to agnd through a switch in acv measurement mode. figure 1. the true rms - to - dc conversion with es636 ovsg or1 vr5 vr4 vr3 vr2 test5 acvl acvh adi ado adohz 1.111m 101k 10k 1k 99.5 acv 1 2 3 4 5 6 7 14 13 12 11 10 9 8 es636 4.7u + +vs +vs - vs 500k 1k 100 - vs 100k 1.5k - vs n1 n2 2 3 1 5 6 3.3u + 10k agnd tl061 es51967 10k +vs - vs 4.7u 1m 5k +vs - vs 4 7 0.47u 100k 10k v 2. 6 10/09/27 9 1.2 resistance measurement a re - configurable divider automatically provides a suitable full - scale range in resistance measurement mode. the following table summarizes the full - scale ranges and the reference resistors in each configuration . in 66m range, the resolution is 0.1m, if shift is floating or connected to dgnd. it will be changed to 0.01m, if dshift is pulled to v - . configuration full scale range relative resistor equivalent value or1 660.0 or1 100 or2 6.600k vr5 1k or3 6 6.00k vr4 10k or4 660.0k vr3 vr1 100k or5 6.600m vr2 vr1 1m or6 66.00m vr1 10m 1.3 current measurement for multimeter es51967 has 2 automatic and 1 manual current measurement modes for multimeter. the following table summarizes the full - scale rang e of each mode. when es51967 operates in the current measurement modes for multimeter, it takes high input from pin ivsh or ivsl, low input from pin sgnd and reference voltage from pin vr. mode fc1~4 1 va s e l 2 vbar full scale input terminal automatic1 1,1, 0,1 1 1 660.0a / 6600a 3 ivsl/ivsh v.s. sgnd automatic2 1,1,1,1 1 1 66.00ma / 660.0ma 3 ivsl/ivsh v.s. sgnd manual 0,0,0,0 1 x 66.00a ivsh v.s. sgnd note: 1. connect vasel to v - will disable a and enable v units on lcd panel, so in other modes, this pi n must keep floating. 2. connect vbar to v - will disable the 2 / m 2 symbol on lcd panel, so in the mv range of voltage measurement, this pin must keep floating. 3. the typical connection of input terminal is as the schematic below: * the voltage results fro m the current flows through resistors r and 9r. its input range is up to 3.3vrms. 1.4 current measurement for clampmeter es51967 has 2 automatic and 4 manual current measurement modes for clampmeter. the following table summarizes full - scale range of each mod e. when es51967 operates in automatic mode1&2, it takes high input from ivsh/ivsl (higher range/lower range), low input from sgnd and reference voltage from vr. when es51967 operates in the manual mode1~4, it takes high input from adp, low input from sgnd and reference voltage from va+ and va - . ivsl ivsh vin * 100k 100k 9r r v 2. 6 10/09/27 10 mode fc1~4 1 va s e l 2 vbar full scale input terminal automatic1 1,1,0,1 1 0 660.0a / 6600a ivsl/ivsh v.s. sgnd automatic2 1,1,1,1 1 0 66.00a / 660.0a ivsl/ivsh v.s. sgnd manual1 1,1,0,0 1 x 6.600a adp v.s. sgnd man ual2 1,0,0,0 1 x 66.00a adp v.s. sgnd manual3 1,0,1,0 1 x 660.0a adp v.s. sgnd manual4 1,0,0,1 1 x 6600a adp v.s. sgnd note: 1. connect vasel to v - will disable a and enable v units on lcd panel, so in other modes, this pin must keep floating. 2. connect vbar to v - will disable the 2 / m 2 symbol on lcd panel, so in the mv range of voltage measurement, this pin must keep floating. 3. in dc current modes for clampmeter, es51967 provides zero function for offset removing. 4. the typical connection of input te rminal is as the schematic below: * the voltage results from induced current flows through a load resistor. its input range is up to 3.3vrms. ivsl ivsh vin * 9r r r l v 2. 6 10/09/27 11 1.5 capacitance measurement the following table summarizes the eight ranges of capacitance measurement mode. config uration full scale range relative resistor measurement period c1 6.600nf vr1 0.33 sec c2 66.00nf vr2 0.33 sec c3 660.0nf vr3 0.33 sec c4 6.600uf vr4 0.33 sec c5 66.00uf r9k / r1k 0.66 sec c6 660.0uf r9k / r1k 1.32 sec c7 6.600mf r9k / r1k 1.32 sec c8 66.00mf r9k / r1k 6.60 sec note: 1. in order to obtain an accurate reading, a capacitor must be discharged before measurement begins. the chip has a built - in discharge mode to automatically discharge the capacitor. in discharge mode, the lcd displays di s.c 2. discharging through the chip is quite slow. we recommend users to discharge the capacitor with some other apparatus. 3. in capacitance mode for clamp - meter (fc1~4={0,1,1,0}, slacdc=1), the c1~c3 ranges will not occur whatever in the automatic or manual op eration . when r_ovh (pin74) is pulled to v - in this mode , the charging current for 660uf - 6.6mf is reduced. the 66 .00 mf range will be omitted. ovh path resistance is allowed to be increased. (for better high voltage protection) 1.6 continuity check continuity check shares the same configuration with 660.0 manual resistance measurement mode and has buzzer output to indicate continuity. the buzzer generates 2khz beep whenever the reading is less than 30. when r_ovh (pin74) is pulled to v - in this mode, the buzz er generates 2khz beep when ever the reading is less than 50. 1.7 diode measurement diode measurement mode shares the same configuration with 6.600v manual voltage measurement mode and has buzzer output to indicate continuity. the buzzer generates a 2khz sou nd whenever the reading is less than 30mv. if the test circuit is open or the voltage drop between the two ports of the device(diode) under test is larger than 2v, the lcd panel will show ol. v 2. 6 10/09/27 12 1.8 frequency counter the time base of the frequency counter is derived from an external crystal oscillator by t counter = 4,000,000 f osc where f osc is the frequency of the crystal oscillator. thus, the counter has a 1 - second time base when a 4mhz oscillator is used. the frequency counter can select the proper ran ge automatically or manually. auto - range operation extends over six decades, from 660.0hz to 66.00mhz. the following table summarizes the full - scale range of the frequency counter. range full scale fr1* 660.0hz fr2 6.600khz fr3 66.00khz fr4 660.0khz f r5 6.600mhz fr6 66.00mhz *if input frequency is less than 10.0hz, es51967 will show 00.0hz . 1.9 duty cycle measurement in frequency mode, press the vahz bottom will force es51967 enter duty cycle measurement mode. the duty cycle measurement mode takes high input from freq pin, and low input from sgnd pin. the annunciator % on lcd panel indicates whether the duty cycle measurement mode is activated. when the duty cycle is less than 10.0%, the lcd panel shows ul and the ul bit of rs232 data becomes high. whe n the duty cycle is more than 94.9%, the lcd panel shows ol and the ol bit of rs232 data becomes high. if the frequency of input signal is less than 10.0hz, the lcd panel also shows ul and the ul bit of rs232 data becomes high. es51967 also provides a sing le duty cycle mode, which fc1~fc4 = {1,1,1,0}, as an independent rotary switch for the meters without a frequency mode configured. 1.10 temperature measurement mode temperature measurement mode takes input signal from adp pin and reference voltage from (va+ - va - ). es51967 has a built - in oc - to - of scale translation circuit, and only needs an external oc scale application circuit. the application circuit for of scale is not required. in temperature measurement mode, the default range is 6600 oc or of. the vbar p in is used to control the first decimal point (dp1) on the lcd panel. when vbar is pulled to v - , dp1 will be turned on and the full scale becomes 660.0 oc or of. v 2. 6 10/09/27 13 1.11 auto power off and idle time selection es51967 has a default auto power off function. if the meter is idle for more than the given idle time, the chip automatically turns the power off. the idle time to trigger the auto power off function is determined by pin aposel. if pin aposel is connected to v - , the idle time will be set to 15 minutes. if pin aposel is connected to dgnd or floating, the idle time will be set to 30 minutes. when apo happens, the state of the meter is saved. the apo sign on the lcd panel indicates whether the auto power off is enabled or not. in some cases, user might want to disable auto power off. there are two ways to disable this feature as following: 1. power on the meter when any of the push functions, except for hold, is pressed down. 2. in addition, when rs232 output is active, the auto power off function is also disabled. n ote : powering on the meter while pressing hold and lasts 2 seconds turns on all lcd segments until hold is pressed again. 1.12 sleep the meter enters sleep mode after auto power off. the sleep pin asserts low ( - 3v) in the sleep mode, and asserts high (+3v, not 0v) after re - power on. 1.13 re - power on after auto power - off, pushing any of the push function or changing the rotary mode can turn on the meter again. if the meter is re - powered on by changing the rotary mode, the saved state is cleared. if the meter is re - p owered on by push functions, the chip restores the saved state and enters hold mode. the lcd displays the saved value. v 2. 6 10/09/27 14 2. measurement mode switching measurement mode depends on the logic level of slacdc, fc1, fc2, fc3, fc4, fc5, and key. when fc5 is high, t he measurement mode list is below. slacdc fc1 fc2 fc3 fc4 mode function of key 0 1 0 1 1 voltage measurement dcv ? acv 0 1 1 0 1 123 auto dc current measurement( a) dca ? aca 0 1 1 1 1 123 auto dc current measurement(ma) dca ? aca 0 0 0 0 0 1 66a dc current measurement(a) dca ? aca x 1 1 1 0 duty cycle measurement 0 1 1 0 0 2 manual dc 6.600a dca ? aca 0 1 0 0 0 2 manual dc 66.00a dca ? aca 0 1 0 1 0 2 manual dc 660.0a dca ? aca 0 1 0 0 1 2 manual dc 6600a dca ? aca 0 0 0 1 1 resistance measurement ? continuity 0 0 0 0 1 continuity check continuity ? diode 0 0 1 1 1 resistance measurement ? continuity ? diode 0 0 0 1 0 frequency measurement 0 0 1 1 0 capacitance measurement 0 0 1 0 0 temperature measurement ? H 1 1 0 1 1 voltage measurement acv ? dcv 1 1 1 0 1 123 auto ac current measurement( a) ac a ? dc a 1 1 1 1 1 123 auto ac current measurem ent(ma) acma ? dcma 1 0 0 0 0 1 66a ac current measurement(a) aca ? dca 1 1 1 0 0 2 manual ac 6.600a aca ? dca 1 1 0 0 0 2 manual ac 66.00a aca ? dca 1 1 0 1 0 2 manual ac 660.0a aca ? dca 1 1 0 0 1 2 manual ac 6600a aca ? dca 1 0 0 1 1 *adp0 1 0 0 0 1 *adp1 1 0 1 1 1 *adp2 1 0 0 1 0 *adp3 1 0 1 1 0 capacitance measurement (clamp) 1 0 1 0 0 temperature measurement H ? x 0 1 0 1 resistance measurement ? diode x means dont care. *when fc5 is high, the adp0, adp1, adp2 and adp3 modes can display minus sign. 1 these modes could be designed for multimeter current modes, please refer to section 1.3. 2 these modes could be designed for clampmeter current modes, please refer to section 1.4. 3 these modes could be designed for clampmeter 2 - rang e automatic voltage modes, please refer to section 1.5. v 2. 6 10/09/27 15 when fc5 is low, the measurement mode list is below. slacdc fc1 fc2 fc3 fc4 mode 0 1 0 1 1 dc voltage measurement 0 1 1 0 1 123 auto dc current measurement( a) 0 1 1 1 1 123 auto dc current measur ement(ma) 0 0 0 0 0 1 66a dc current measurement(a) x 1 1 1 0 duty cycle measurement 0 1 1 0 0 2 manual dc 6.600a 0 1 0 0 0 2 manual dc 66.00a 0 1 0 1 0 2 manual dc 660.0a 0 1 0 0 1 2 manual dc 6600a 0 0 0 1 1 resistance measurement 0 0 0 0 1 continuity check 0 0 1 1 1 diode measurement 0 0 0 1 0 frequency measurement 0 0 1 1 0 capacitance measurement 0 0 1 0 0 temperature measurement () 1 1 0 1 1 ac voltage measurement 1 1 1 0 1 123 auto ac current measurement( a) 1 1 1 1 1 123 auto ac current measurement(ma) 1 0 0 0 0 1 66a ac current measurement(a) 1 1 1 0 0 2 manual ac 6.600a 1 1 0 0 0 2 manual ac 66.00a 1 1 0 1 0 2 manual ac 660.0 a 1 1 0 0 1 2 manual ac 6600a 1 0 0 1 1 *adp0 1 0 0 0 1 *adp1 1 0 1 1 1 *adp2 1 0 0 1 0 *adp3 1 0 1 1 0 capacitance measurement (clamp) 1 0 1 0 0 temperature measurement (H) x 0 1 0 1 resistance measurement x means dont care. * w hen fc5 is low, t he adp0, adp1, adp2 and adp3 modes can not display minus sign. 1 these modes could be designed for multimeter current modes, please refer to section 1.3. 2 these modes could be designed for clampmeter current modes, please refer to section 1.4. 3 these modes could be designed for clampmeter 2 - range automatic voltage modes, please refer to section 1.5. v 2. 6 10/09/27 16 3. push function all the enabled push functions will be reset when the measurement mode is changed by rotary switch. change measurement mode by key function will reset enabled range, hold, max/min, rel and zero functions. the following table lists the available function versus every measurement mode. function mode range hold max/min rel zero vahz voltage o o o o x o 1 2- range auto voltage mode o o o o x o 2 curre nt mode for multimeter o o o o x o 3 current mode for clampmeter o o o ac dc ac resistance o o o o x x frequency o o o o x x duty cycle x o o o x x capacitance o o o o x x continuity x o o o x x diode x o o o x x temperature x o o o x x note: 1 incl ude auto 66.00v/660.0v and auto 660.0v/1000v modes, please refer to section 1.5 . 2 include automatic a, automatic ma and manual 66a modes, please refer to section 1.3 . 3 include 2 automatic modes and 4 manual modes, please refer to section 1.4 . 3.1 hold hold m ode makes the meter stop updating the lcd panel. this mode can be nested in most of the special modes. enabling hold function in automatic mode makes the meter switch to manual mode, but the full - scale range remains the same. hold function can be cancelled by changing the measurement mode, pressing range, or push hold again. v 2. 6 10/09/27 17 3.2 range range pin switches to and from automatic and manual mode, and while in manual mode, changes the full - scale range. the following figure shows the state transition. automatic mode manual mode 1 push < 1 sec 1 push > 1 sec 1 push < 1 sec range up measurement mode auto manual control range initial range v(dc/ac) vr2 C vr5 vri vri + 1, vr5 vr1 660.0mv C 1000v 6.600v auto 66v/660v (dc/ac) r1 C r2 r1 r2, r2 r1 66.00v C 660.0v 66.00v auto 660v/1000v (dc/ac) r1 C r2 r1 r2, r2 r1 660.0v C 1000v 660.0v auto a(dc/ac) r1 C r2 r1 r2, r2 r1 660.0a C 6600a 660.0a auto ma(ac/dc) r1 r2 r1 r2 r2 r1 66.00ma C 660.0ma 66.00ma 66 a(dc/ac) fixed fixed 66.00a 66.00a auto 66a/660a (dc/ac) r1 r2 r1 r2 r2 r1 66.00a C 660.0a 66.00a auto 660a/6600a (dc/ac) r1 r2 r1 r2 r2 r1 660.0a C 6600a 660.0a capacitance c1 C c8 ci ci + 1, c8 c1 6.600nf C 66.00mf 6.600nf clamp capacitance (when r_ovh is floating ) c4 C c8 ci ci + 1, c8 c4 6.600f C 66.00mf 6.600f clam p capacitance ( when r_ovh is pulled to v - ) c4 C c 7 ci ci + 1, c 7 c4 6.600f C 6 . 600mf 6.600f or1 C or6 ori ori + 1, or6 or1 660.0 C 66.00m 660.0 continuity fixed fixed 660.0 660.0 diode fixed fixed 6.600v 6.600v frequency fr1 C fr6 fri fri + 1 fr6 fr1 660.0hz C 66.00mhz 660.0hz note: pushing range resets all existing special modes. 3.3 key see section measurement mode switching for the function of this pin. v 2. 6 10/09/27 18 3.4 rel + hold in rel mode, the lcd panel displays d n+k - d n , where n = 1, 2, 3 , , d n is the last value before rel is pushed, and d n+k is the current value. the meter returns to normal operation if rel is pressed again. pressing hold in rel mode makes the meter stop updating the lcd panel. note: its possible that the relative va lue exceeds 6,600 or C 6,600 counts, but never exceeds 9,999 or C 9,999 counts. such relative values are displayed. the lcd shows ol in rel mode only if d n or d n+k is more than 6,600 counts or the relative value is more than 9,999. 3.5 max/min + hold the meter displays the maximum or minimum value of the input in max/min mode. when max/min is pressed for the first time, the meter displays the maximum value. the meter displays the minimum value, when it is pressed again. when max/min is pressed for the third time , the meter displays current value. the meter returns to normal operation if max/min is pressed and held for longer than one second. pressing hold in max/min mode makes the meter stop updating the maximum or the minimum value. original s tate (auto/manual) re l active. the relative value rel and h active. hold the relative value push hold push rel push rel push hold original state (automatic/manual) max active max value min active min value max h active hold max value. min h active hold min value. push hold push hold 1push<1s 1 push>1 sec 1 push>1s 1 push<1s max min blink current value 1push<1s push hold max min h blink hold current value. 1push<1s 1push<1s 1 push>1 sec 1push<1s 1push<1s v 2. 6 10/09/27 19 3.6 relative + max/min + hold max/min mode can be nested in rel mode. the meter displays the maximum or minimum value relative to the reference when max/min is pressed in rel mode. pressing hold under rel + max/min makes the meter stop updating the lcd panel. 3.7 zero function in manual dc 6.600a, 66.00a, 660.0a and 6600a, auto dc 66.00a/660.0a and auto dc 660.0a/6600a mesurement modes, es51967 provides zero function to remove the residual current value. push zero bottom less than one second to enter zero mode. in zero mode, the lcd pane l displays d n+k - d n , where n = 1, 2, 3, , d n is the last conversion value before zero is pushed, and d n+k is the current conversion value. if zero is pushed again in zero mode, the meter will refresh the d n value and displays the d n+k - d n again . the me ter returns to normal operation if zero is pressed and held for longer than one second. pressing hold in zero mode makes the meter stop updating the lcd panel. in 2 - range auto dca modes for clampmeter (660.0a/6600a or 66.00a/660.0a), the system will stay i n automatic mode, even if the zero function is activated. in other words, it could achieve real automatic operation. in automatic mode, zero function could not be entered from higher range, but it could be still activated if current range is lower one. thi s is because most residual current value is so small that the range could not be higher one in automatic mode. when enter zero mode from original state (auto/manual) rel active. the relative value rel and max active. maximum rel. value rel max min blink. current rel. value rel and min active. minimum rel. value push max/min push max/min > 1s push max/min rel , max , h active. hold max. rel. value rel , min , h active. hold min. rel. value rel , max , min , h blink. hold the current rel. value push max/min push max /min push hold push hold push hold push max/min push rel push rel push max/min v 2. 6 10/09/27 20 lower range, the system will store the nonzero counts (residual current value). if the range goes up to higher one auto matically, the nonzero counts will be divided by ten. so this function will still work well in automatic modes. state diagram for zero mode: state diagram for zero + hold mode: state diagram for zero + max/min + hold mode: original state zero active show d n+k - d n press zero > 1s press zero press zero < 1s zero hold active stop lcd upgrading press hold original state zero acti ve show d n+k - d n press zero > 1s press zero press zero < 1s original state (auto/manual) zero max active show max. d n+k - d n zero max min blink. current d n+k - d n zero min active show min. d n+k - d n push max/min push max/min > 1s push max/min zero max hold active hold max. d n+k - d n va l u e zero min hold active hold min. d n+k - d n va l u e zero , max , min , h blink. hold the current d n+k - d n push max/min push max/min push hold push hold push hold push max/min push zero push zero > 1s push max/min zero active show d n+k - d n push zero < 1s v 2. 6 10/09/27 21 4. serial data output the rs232 function will be activated if the rs232 pin is pulled to and asserts at v - . the serial data sent to sdo pin once every a/d conversion cycle. the data format complies with jis 7bits transmission code with a baud rate of 19230. the host can use rs232 interface to read the data. a single data packet includes a start bit (always 0), 7 data bits, an odd parity check bit, and a stop bit (always 1). the high and low voltage levels correspond to dgnd and v - respectively. sdo remains at 1 (high) whe n it is inactive. hence the start bit (0) could be used as the triggering signal to begin the reading process. the following figure shows the data format of a single packet. the lsb is sent first and the msb is sent last. single package 0 p 1 p 0v -3v lsb msb d0 ~d6 one data block consists of 11 packets, or 110 bits. the following figure shows the format of a data block. the range packet indicates the full scale range of the meter. digit 3 through digit 0 are just the digits on the lcd panel. the function packet indicates the measurement mode of the meter. status, option 1 and option 2 give the status of the meter. cr and lf are delimiters used to separate the blocks. all package 0 p 1 status digit2 digit3 function range option1 cr lf digit0 digit1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 0 p 1 option2 the meter always outputs the current input value to the serial port in spite of hold v 2. 6 10/09/27 22 mode. each block is repeated twice in one conversion cycle. the detailed data format of each packet is listed below. 4.1 functuon this packet indica tes the measurement mode of the meter. the following table summarizes the transmitted code for each mode. note that the encoding of this packet is different from the encoding of fc1 - fc5 switch. code measurement mode vbar=0, vasel=0 vbar=1,vasel=0 vbar=1,v asel=1 0111011 voltage dont care 3 0111101 auto a current auto a current auto 660.0a/6600a auto 660.0v/6600v 3 0111111 auto ma current auto ma current auto 66.00a/660.0a auto 66.00v/660.0v 0110000 66 a current dont care 0111001 manual a current 01 10011 0110101 continuity 0110001 diode 0110010 frequency 0110110 capacitance 0110100 2 temperature 0111110 1 adp 1 when the function code = 0110010, the measurement mode is determined by judge bit of status packet. if judge bit is 1, it means duty c ycle mode. if judge bit is 0, it means adp mode. 2 when the function code = 0110100, t he judge bit in the status packet determines whether the unit is celsius or fahrenheit. 3 when the function code = 0111101 or 0111111, the measurement mode is determined by vbar bit and vasel bit of option1 packet. 4.2 range this packet indicates the full - scale range of the meter. when the meter operates in continuity mode or diode mode, this packet is always 0110000 since the full - scale ranges in these modes are fixed. the foll owing table lists the code for each range in each measurement mode. code v * 2 - range auto v/a 66 a manual a adp frequency capacitor 0110000 6.600v lower range(ivsl) 66.00 a 6.600a adp3 660.0 660.0hz 6.600nf 0110001 66.00v higher range(ivsh) 66.00a ad p2 6.600k - 66.00nf 0110010 660.0v 660.0a adp1 66.00k 6.600khz 660.0nf 0110011 1000v 6600a adp0 660.0k 66.00khz 6.600f 0110100 660.0mv 6.600m 660.0khz 66.00f 0110101 66.00m 6.600mhz 660.0f 0110110 66.00mhz 6.600mf 0110111 66.00mf * it includes auto a, ma, 66.00v/660.0v, 660.0v/1000v, 66.00a/660.0a, 660.0a/6000a. v 2. 6 10/09/27 23 4.3 digit 3 C digit 0 digit 3 is the most significant digit on the lcd panel, and digit 0 is the least significant digit. digit code 0 0110000 1 0110001 2 0110010 3 0110011 4 0110100 5 0110101 6 0110110 7 0110111 8 0111000 9 0111001 note: because the cycle time of measurement for continuity/diode mode is only 82.5ms, the least significant digit may not be accurate 4.4 status the format of this package shown below. in temperature mode, judge is 1 if the unit is c and is 0 if the unit is f. sign field indicates whether the minus sign on the lcd panel is on or off. batt field is one when battery low condition is true. ol indicates input overflow. in vah z mode, the judge is 1 if the duty cycle mode is active. 0 1 1 judge sign b at t ol bit6 bit 5 bit 4 bit 3 bit 2 bit1 bit 0 4.5 option 1 0 1 1 ul va s e l vbar 0 bit 6 bit 5 bit 4 bit 3 bit 2 bit1 bit 0 the ul bit will be 1 only in following conditions: 1. the reading is less than 10.0hz(lcd shows ul) in fr1 range of frequency mode. 2. the input frequency is less than 10.0hz or the duty cycle value is less than 10.0% in duty cycle measurement mode. the vasel bit will be 1, when the vasel pin is connected to v - . th e vbar bit will be 1, when the vbar pin is connected to v - . v 2. 6 10/09/27 24 4.6 option 2 this packet contains information on the operation mode of the meter. the format is shown below. the dc field indicates that the meter operates in dc measurement mode, either voltage or current. the ac field indicates that the meter operates in ac measurement mode, either voltage or current. the auto field is set to one if the meter operates in automatic mode, and is set to zero when the meter operates in manual mode. 0 1 1 dc ac auto v ahz bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 4.7 cr carriage return. the transmitted code is 0001101. 4.8 lf line feed. the transmitted code is 0001010. 5. miscellaneous the conditions, which the meter turns on the buzzer, include: (1) changing measurement mode g enerates one beep. (2) pressing any of the push functions generates one beep, if the function is valid. (3) power on and re - power on generate one beep. (4) input overflow in voltage and current mode generates one beep every 0.3 seconds (or 3.33 beeps per second.) (5) con tinuity(diode) check generates a continuous 2khz beep whenever the measurement is less then 30(30mv) (6) auto power off generates a 2khz beep which lasts for 1.5 seconds. the following figures show the output waveform from the buzout pin. 0.5 ms (a) continuous 2khz beep 0.3 sec 0.15 sec (b) 3.33 beep/sec v 2. 6 10/09/27 25 5.1 lcd panel seg01 seg02 seg03 seg04 seg05 seg06 seg07 seg08 seg09 bp1 apo auto a4 manu a3 hold bp2 - ac f4 b4 f3 b3 f2 a2 b2 bp3 batt dc e4 g4 e3 g3 e2 g2 c2 bp4 rs232 dp3 d4 c4 d3 c3 dp2 d2 dp1 seg10 seg11 seg12 seg13 seg14 seg15 seg16 seg17 bp1 a1 2 m rel n adp0 bp2 f1 b1 m 2 k max 1 adp1 bp3 e1 g1 H v min m 1 adp2 bp4 d1 c1 % a hz zero f adp3 lcd backplane waveform v - +3.1 v - +3.1 v - v - v - +3.1 batt dc ac apo rs232 auto manu hold H rel n 1 m 1 f 2 m 2 v a m k hz max min % s1 s2 s3 s4 s5 s6 s7 s 8 s15 s10 s11 s12 s13 s14 s9 adp0 adp1 adp2 adp3 s16 bp1 bp2 bp3 bp4 s17 zero v - +3.2 v - +3.2 v - v - v - +3.2 v - v - +3.2 v - v - +3.2 v - v 2. 6 10/09/27 26 5.2 lcd display on condition lcd annunciator condition v in voltage measurement mode, and diode measurement mode. a in current measurement mode. i n resistance measurement mode, and continuity mode. f in capacitance measurement mode. in continuity check mode. in diode mode. % in duty cycle measurement. hz in frequency mode. adp1 in adp1 mode adp2 in adp2 mode adp3 in adp3 mode adp4 in a dp4 mode dc in dc voltage or dc current mode. ac in ac voltage or ac current mode. auto when automatic full scale range selection is enabled. manu in manual mode. hold when hold function is enabled. rel when relative function is enabled. max / min w hen max or min function is enabled. zero when zero function is enabled. m 1 in capacitor measurement mode and the full scale range is in the order of mf. 1 in capacitor measurement mode and the full scale range is in the order of uf. n in capacitor mea surement mode and the full scale range is in the order of nf. m 2 in voltage or current measurement mode and the full scale range is in the order of 10 - 3 . 2 in current measurement mode and the full scale range id in the order of ua. m in resistance meas urement mode and the full scale range is in the order of m k in resistance measurement mode and the full scale range is in the order of k in temperature measurement mode and when the unit is H in temperature measurement mode and when the unit is H apo when auto power off function is enabled. rs232 when rs232 output is enabled. 5.3 operating timing es51967 incorporates a dual slope adc with four phases: zi, az, int and dint. the timing of each phase are listed below. * voltage / ohm /adp / manual c urrent (for clampmeter) measurement: phase time zi 40ms az 25ms int 100ms dint 165ms p. s . in the dc voltage and ohm measurement with auto mode, if the range is changed, the internal clock rate will increase four times and the new measurement cycle b ecomes 1/4 times of the original cycle until the range is stable. v 2. 6 10/09/27 27 * current mode for multimeter / auto current mode for clampmeter / 2 - range auto voltage mode phase time zi 40ms az 25ms int 100ms dint 82.5ms * continuity/diode measurement phase time zi 40ms az 25ms int 100ms dint 82.5ms *capacitance measurement: range total measurement time 6.600nf 0.33sec 66.00nf 0.33sec 660.0nf 0.33sec 6.600f 0.33sec 66.00f 0.66sec 660.0f 1.32sec 6.600mf 1.32sec 66.00mf 6.6sec * duty cycle measurement every conversion takes 0.66 second. * frequency measurement in 660.0hz range, the measurement cycle = 0.25 ~ 0.5 sec in range 6.6khz~66mhz, the measurement cycle = 1.05 sec p. s . in the frequency measurement wit h auto mode, if the range is changed, the internal clock rate will increase ten times and the new measurement cycle becomes 1/10 times of the original cycle until the range is stable. v 2. 6 10/09/27 28 6. test circuit 6. low battery 680k 270k ba tt lbat9 v - agnd 0.1u 0v 9v d1 15k ovsg or1 vr5 vr4 vr3 vr2 v r 1 99.5 1k 10k 101 k 10m ado adi acvl acvh v r 88m d2 0.1u 0.47u 10k 10k 15k 1.0u 1.0u 1.111m - 400mv test5 voltage input agnd 1. voltage te st - 400mv adp 100k va - va + 7. adp test sgnd agnd adpin+ adpin - 100 1.5k ptc z1 6v ovsg 10m 1.111m ovh vr1 vr2 5 . diode test agnd z2 4. current test 100k 100k 450 45 4.5 0.495 0.005 ma ma ua ua ua ma ivsl ivsh agnd a sgnd 10a r l vr 100k r adp sgnd va + va - vref + - 3. current test for clamp meter agnd fin f r e q 2.2u ptc 200 1.5k 8. frequency test 100 1.5k ptc z1 6v ovh 2. resistor test ovsg or1 vr5 vr4 vr3 vr2 99.5 1k 10k 101k 1.111m ovx sgnd agnd z2 ohmc 47n 300p ohmc1 ohmc2 330n 220n v 2. 6 10/09/27 29 7. application circuit notes: 1. most of pins are protected by the esd protection circuits. however pins, v+, v - , agnd, dgnd and vr1 are not protected enough because the parasitic effect must be decrease. therefore enough external protection is needed for assembling, carrying and keeping. in addition, components connecting to these unprotected pins have to be soldered on board before the ic is soldered. 2. all the zener diodes above are used for ic protection . these protection are needed and these zener diodes must be soldered on pcb first before soldering es51967 on. 3. cp is the compensation capacitor for measuring capacitance. its value depends on the parasitic capacitor on the pcb. (the recommended value is not less than the filter capacitor applied at ovx) 4. the capacitanc e value marked in red means that these capacitors must have good stability and low leakage current, for example, the mkt type or even better quality ones. v+ cref+ cref - cint caz ( 5 ) buff raz ivsh ivsl ovx ( 10 ) ohmc ovh ovsg or1 vr5 ( 15 ) vr4 vr3 vr2 test5 acvl ( 20 ) acvh adi ado adohz vrh ( 25 ) vr va + va - adp sgnd ( 30 ) 220n 220n 450k 0.1 450 45 4.5 0.495 0.005 a a a ma ma ma 10a 99.5 1k 10k 101k 1.111m 100k 100k 100 1.5k 100k 300p ptc r c 15k 1 1 15k 0.1 0.47 88m 10k 10k d1 d2 55k 10k 1 + + + (50) seg14 seg15 seg16 seg17 aposel ( 45 ) bklit dshift rs232 freq sleep ( 40 ) ohmc2 csh - csh+ ca+ ca - ( 35 ) r1k r9k vbar vr1 ohmc1 10m + rel hold rang e cesel bkset ( 85 ) key slacdc fc5 fc4 fc3 ( 90 ) fc2 fc1 l b at9 sdo c - ( 95 ) c+ v - dgnd agnd agnd ( 100 ) 0.47 4m v - ( 80 ) va h z max/min v st osc2 osc1 ( 75 ) bkout r_ovh nc zero buzin ( 70 ) or buzout annunc bp1 bp2 ( 65 ) bp3 bp4 seg01 seg02 seg03 ( 60 ) seg04 seg05 seg06 seg07 seg08 ( 55 ) seg09 seg10 seg11 seg12 seg13 lcd display . . . 150k 220n 200 2.2 fin 9k 1k 1.5k ptc v - es51967 470n 27k 10a 5.6v v - 1815 c 220n 47n 330n 100k cp 22n 0.1 0.1 10 10 3v + + 5.6v zi 7.5v zi v 2. 6 10/09/27 30 8. package 1 100 pin qfp package title: topview.eps creator: fig 2dev version 3.2 patchlevel 1 A[: epsD? sDY? ]: epsD??? postscript ?C ??C title: sideview.eps creator: fig 2dev version 3.2 patchlevel 1 A[: epsD? sDY? ]: epsD??? postscript ?C ??C 2 dimension paramenters symbol milimeter mill min. typ. m ax. min. typ. max. w 19.90 20.00 20.10 783.5 787.4 791.3 l 13.90 14.00 14.10 547.2 551.2 551.2 a 0.425 16.7 b 0.20 0.30 0.40 7.9 11.8 11.8 c 0.65 25.6 d 1.05 1.20 1.35 41.3 47.2 47.2 a 2.57 2.72 2.87 101.2 107.1 107.1 d 2.50 98.4 0 o 10 o |
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