figure 1. functional block diagram features 12-bit resolution, 400khz throughput 8 channels single-ended or 4 channels differential miniature, 40-pin, ceramic ddip full scale input range from 100mv to 10v three-state outputs no missing codes typical topology is shown. general description the hdas-524 and hdas-528 are complete data acquisition systems. each contains an internal multiplexer , instrumentation ampli? er, sample-hold, analog-to-digital converter and three-state outputs. packaged in miniature, 40-pin, double-dip packages, the hdas-524/528 have a low power dissipation of 2.6 watts. the hdas-524 provides 4 differential inputs, and the hdas-528 provides 8 single-ended inputs. an internal instrumenta- tion ampli? er is characterized for gains of 1, 2, 4, 8, 10 and 100. the gain range is selectable through a single external resistor. hdas-524/528 operation the hdas devices accept either 8 single-ended or 4 differential input signals. t ie unused channels to signal ground, pin 14. channel selection is accomplished using the multiplexer address pins as shown in table 1. obtain additional channels by connecting external multiplexers. the acquisition time is the amount of time the multiplexer, instrumentation ampli? er and sample-hold require to settle within a speci? ed range of accu- racy. the acquisition time can be measured by how long eoc is low before the rising edge of the start convert pulse for continuous operation. higher pin function pin function 1 ch0/ch0 hi 40 start convert 2 ch1/ch1 hi 39 ca2 3 ch2/ch2 hi 38 ca1 4 ch3/ch3 hi 37 ca0 5 ch7/ch3 lo 36 +5v supply 6 ch6/ch2 lo 35 digital ground 7 ch5/ch1 lo 34 enable 8 ch4/ch0 lo 33 bit 1 (msb) 9 comp bin 32 bit 2 10 rgain lo 31 bit 3 11 rgain hi 30 bit 4 12 s/h out 29 bit 5 13 +10v reference out 28 bit 6 14 signal ground 27 bit 7 15 gain adjust 26 bit 8 16 offset adjust 25 bit 9 17 bipolar 24 bit 10 18 C15v supply 23 bit 11 19 analog ground 22 bit 12 (lsb) 20 +15v supply 21 eoc input/output connections continued on page 3 hdas-524, hdas-528 12-bit, 400khz, complete data acquisition system ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 mdc_hdas-524/528.b02 page 1 of 5
analog inputs min. typ. max. units number of inputs hdas-524 4 differential inputs hdas-528 8 single-ended inputs input voltage ranges gain = 1 0 to +10v, 10v gain = 100 0 to +100mv, 100mv i.a. gain ranges 1, 2, 4, 8, 10, 100 input impedance ch on, ch off 10 11 10 12 ohms input capacitance (-524) ch on, ch off 12 pf (-528) ch on, ch off 25 pf input bias current 200 pa input offset current 50 pa input offset voltage 10 mv common mode voltage range 11 volts cmrr, g = 1, @10hz, vcm = 1vp-p 72 80 db voltage noise (rms) gain = 1 200 v gain = 8 50 v mux crosstalk @125khz C72 db mux on resistance 450 500 ohms bias current tempco doubles (max.) every 10c above +70c offset current tempco doubles (max.) every 10c above +70c offset voltage tempco (30ppm/c x gain) 20ppm/c (max.) input gain equation digital inputs logic levels logic 1 +2.0 volts logic 0 +0.5 volts logic loading logic 1 +5 a logic 0 C600 a outputs logic levels logic 1 +2.4 volts logic 0 +0.4 volts logic loading logic 1 C160 a logic 0 +6.4 ma internal reference voltage, +25c +9.9 +10.0 +10.1 volts drift 5 35 ppm/c external current 1.5 ma output coding straight binary/offset binary comp. binary/comp. offset binary parameters min. typ. max. units +15v supply, pin 20 0 +18 volts C15v supply, pin 18 0 C18 volts +5v supply, pin 36 C0.5 +7 volts digital inputs, pins 9, 34, 37-40 C0.3 +v dd +0.3 volts analog inputs, pins 1C8 C15 +15 volts lead temperature (10 seconds) 300 c performance min. typ. max. units resolution 12 bits integral nonlinearity, +25c 0.75 lsb 0 to +70c 0.75 lsb C55 to +125c 1.5 lsb differential nonlinearity, +25c 0.75 lsb 0 to +70c 0.75 lsb C55 to +125c 1 lsb f.s. abs. accuracy, +25c 0.13 0.3 %fsr 0 to +70c 0.15 0.5 %fsr C55 to +125c 0.25 0.78 %fsr unipolar zero error, +25c 0.074 0.15 %fsr unipolar zero tempco 15 30 ppm/c bipolar zero error, +25c 0.074 0.15 %fsr bipolar zero tempco 5 10 ppm/c bipolar offset error, +25c 0.1 0.25 %fsr bipolar offset tempco 20 40 ppm/c gain error, +25c 0.1 0.25 % gain tempco 20 40 ppm/c harmonic distortion (Cfs) (dc to 5khz, 10vp-p) ? C73 C65 db no missing codes over operating temperature range signal timing enable to data valid delay 10 ns mux address set-up time 400 ns start convert pulse width 50 100 ns data valid after eoc signal goes low 20 ns conversion time, +25c 800 ns 0 to +70c 850 ns C55 to +125c 880 ns throughput rates ? gain = 1 400 khz gain = 2 325 khz gain = 4 275 khz gain = 8 225 khz gain = 10 175 khz gain = 100 40 khz s/h performance acquisition time full-scale step to 0.01% 500 900 ns full-scale step to 0.1% 400 750 ns aperture delay C50 C20 0 ns aperture uncertainty 150 ps slew rate 70 90 v/ s hold mode settling time to 1mv 100 200 ns to 10mv 75 150 ns feedthrough rejection 80 88 db droop rate ? 0.1 100 v/s power supplies range, +15v supply +14.25 +15.0 +15.75 volts C15v supply C14.25 C15.0 C15.75 volts +5v supply +4.75 +5.0 +5.25 volts current, +15v supply +78 +90 ma C15v supply C72 C82 ma +5v supply +75 +95 ma power dissipation 2.6 3 watts power supply rejection 0.05 %fsr/%v physical/environmental oper. temp. range, case, -mc, 0 +70 c -mm, 883 C55 +125 c storage temp. range C65 +150 c package type 40-pin ceramic ddip weight 0.56 ounces (16 grams) absolute maximum ratings functional specifications (apply over the operating temperature range with 15v and +5v supplies unless otherwise speci? ed.) footnotes: ? speci? cations valid at +25c and over the temperature ranges of 0 to +70c or C55 to +125c. 2k r gain gain = +1 hdas-524, hdas-528 12-bit, 400khz, complete data acuisition system ?? datel k 11 cabot boulevard mans? eld ma 020481151 usa k tel (508) 3393000 k wwwdatelcom k email helpdatelcom 01 apr 2011 mdchdas524/528b02 page 2 of 5
notes: 1. for unipolar operation, connect pin 12 to pin 17. 2. for bipolar operation, connect pin 13 to pin 17. 3. position r gain as close as possible to pins 10 and 11. use rn55c, 1% resistors. 4. if gain and offset adjusts are not used, connect pin 15 to ground and leave pin 16 open. figure 2. typical connection diagram mux address pins 39 38 37 ca2 ca1 ca0 channel 0 0 0 0 0 0 1 1 hdas-524 0 1 0 2 (2-bit address) 0 1 1 3 1 0 0 4 1 0 1 5 hdas-528 1 1 0 6 (3-bit address) 1 1 1 7 table 1. mux channel addressing zero adjust gain adjust input range +1/2lsb +fs C 1 1/2lsb 0 to +10v +1.22mv +9.9963v 10v +2.44mv +9.9927v table 3. zero and gain adjust input range gain r gain throughput 0 to +10v 1 open 400khz 0 to +5v 2 2k 325khz 0 to +2.5v 4 665 275khz 0 to +1.25v 8 287 225khz 0 to +1v 10 221 175khz 0 to +100mv 100 20 40khz 10v 1 open 400khz 5v 2 2k 325khz 2.5v 4 665 275khz 1.25v 8 287 225khz 1v 10 221 175khz 100mv 100 20 40khz table 2. input range parameters (gain C1) 2k r gain = gain = +1 2k r gain
gains require the use of the r gain resistor to increase the acquisition time. the gain is equal to 1 without an r gain resistor. table 2 refers to the appropriate r gain resistors for various throughputs. the hdas devices enter the hold mode and are ready for conversion upon the start convert going high. the conversion is complete within a maximum of 800ns (+25c). eoc returns low, the data is valid and sent to the three-state output buffers. the sample/hold is now ready to acquire new data. calibration procedure 1. connect the converter per figure 2 and tables 2 and 3 for the appropriate input range. apply a pulse of 100 nano-seconds (typical) to the start convert input (pin 40) at a rate of 100khz. this rate is chosen to reduce ? icker if leds are used on the outputs for calibration purposes. 2. zero adjustments apply a precision voltage reference source between the analog input and signal ground (pin 14). adjust the output of the reference source per table 3. for unipolar, adjust the zero trimming potentiometer so that the output code ? ickers equally between 0000 0000 0000 and 0000 0000 0001 with the comp bin (pin 9) tied high (straight binary) or between 1111 1111 1111 and 1111 1111 1110 with the comp bin (pin 9) tied low (complementary binary). for bipolar operation, adjust the potentiometer such that the code ? ickers equally between 1000 0000 0000 and 1000 0000 0001 with comp bin (pin 9) tied high (offset binary) or between 0111 1111 1111 and 0111 1111 1110 with comp bin (pin 9) tied low (complementary offset binary). 3. full-scale adjustment set the output of the voltage reference used in step 2 to the value shown in table 3. adjust the gain trimming potentiometer so that the output code ? ickers equally between 1111 1111 1110 and 1111 1111 1111 or 0000 0000 0001 and 0000 0000 0000 for complementary coding. 4. to con? rm proper operation of the device, vary the precision reference voltage source to obtain the output coding listed in table 4. hdas-524, hdas-528 12-bit, 400khz, complete data acquisition system ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 mdc_hdas-524/528.b02 page 3 of 5
table 4. output coding technical notes 1. rated performance requires using good high-frequency circuit board layout techniques. the analog and digital ground pins are not connected to each other internally. avoid ground-related problems by connecting the analog, signal and digital grounds to one point, the ground plane beneath the con- verter. due to the inductance and resistance of the power supply return paths, return the analog and digital grounds separately to the power supplies. this prevents contamination of the analog ground by noisy digital ground currents. 2. double-level multiplexing allows expanding the multiplexer channel capacity of the hdas-528 from 8 single-ended channels to 128 single-ended chan- nels or the hdas-524 from 4 differential channels to 32 differential channels. unipolar input range output coding input range bipolar scale 0 to +10v msb lsb msb lsb 10v scale +fs ? 1lsb +9.9976v 1111 1111 1111 0000 0000 0000 +9.9951v +fs ? 1lsb +7/8fs +8.7500v 1110 0000 0000 0001 1111 1111 +7.5000v +3/4fs +3/4fs +7.5000v 1100 0000 0000 0011 1111 1111 +5.0000v +1/2fs +1/2fs +5.0000v 1000 0000 0000 0111 1111 1111 0.0000v 0 +1/4fs +2.5000v 0100 0000 0000 1011 1111 1111 ?5.0000v ?1/2fs +1/8fs +1.2500v 0010 0000 0000 1101 1111 1111 ?7.5000v ?3/4fs +1lsb +0.0024v 0000 0000 0001 1111 1111 1110 ?9.9951v ?fs + 1lsb 0 0.0000v 0000 0000 0000 1111 1111 1111 ?10.0000v ?fs straight binary comp. binary offset binary comp. off. binary notes: 1. a start convert pulse greater than 150ns will slow the throughput. 2. retriggering start convert before eoc goes low will not start a new conversion. 3. times shown apply over the 0 to +70c operating temperature range. figure 3. hdas-524/528 timing diagram 3. obtain straight binary/offset binary output coding by tying comp bin (pin 9) to +5v or leaving it open. the device has an internal pull-up resistor on this pin. to obtain complementary binary or complementary offset binary output coding, tie pin 9 to ground. the comp bin signal is compatible to cmos/ttl logic levels for those users desiring logic control of this function. 4. to enable the three-state outputs, connect enable (pin 34) to a logic "0" (low). to disable, connect pin 34 to a logic "1" (high). hdas-524, hdas-528 12-bit, 400khz, complete data acquisition system ?? datel ? 11 cabot boulevard, mans? eld, ma 02048-1151 usa ? tel: (508) 339-3000 ? www.datel.com ? e-mail: help@datel.com 01 apr 2011 mdc_hdas-524/528.b02 page 4 of 5
mechnical dimensions inches (mm) ordering information model no. input operating temp. range hdas-524mc 4d channels 0 to +70c hdas-524mm 4d channels C55 to +125c hdas-528mc 8se channels 0 to +70c HDAS-528MM 8se channels C55 to +125c hdas-528/883 8se channels C55 to +125c receptacle for pc board mounting can be ordered through amp inc., part #3-331272-8 (component lead socket), 40 required. contact datel for mil-std-883 product speci? cations. iso 9001 iso 9001 registered 40-pin ddip pin 1 index ( on top) 2.12 max. (53.85) 0.018 0.002 (0.457) 0.100 typ. (2.540) 0.100 (2.540) seating plane 0.025 (0.635) 0.200 max. (5.080) 0.245 max. (6.223) 0.210 max. (5.334) 0.040 (10.160) 0.80 max. (20.32) 0.012 0.003 (0.305) 12 0 21 40 1.900 0.008 (48.260) (unless otherwise indicated): 2 place decimal (.xx) 0.010 (0.254) 3 place decimal (.xxx) 0.005 (0.127) kovar alloy 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 0.600 0.010 (15.240) 0.100 (2.540) hdas-524, hdas-528 12-bit, 400kh, complete data acuisition system . makes no representation that the use o its products in the circuits described herein, or the use o other technical inormation contained herein, will not inringe upon eisting or uture patent rights. the descriptions contained herein do not imply the granting o licenses to make, use, or sell euipment constructed in accordance therewith. speci? cations are subect to change without notice. www.datel.com ? e-mail: help@datel.com ?? datel 11 cabot boulevard, mans? eld, ma 02048-1151 usa itar and iso 9001/14001 registered 01 apr 2011 mdc_hdas-524/528.b02 page 5 o 5
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