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| www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - Short Circuit Proof - Applications Industrial encoder interfacing Industrial sensor interfacing Proximity switches Industrial controllers PLC * Light barriers * * * * Features * * * * * * * * Max. voltage range from 4,5 V - 36 V Short circuit proof tri-state outputs drive up to 120mA sink / source Operating frequency up to 4 MHz Pin compatible with ET7272 Dynamic peak current up to 1,5 Amp. High impedance CMOS / TTL compatible buffered inputs with hysteresis Outputs RS422A compatible Small package TSSOP (OL2068) available Line voltage in Voltage regulator 5V , 5mA out General Description The OL7272 is an industrial power linedriver and contains four identical short circuit proof differential linedrivers up to 30 Volts driver supply with a joint enable function. At overload there is a thermal shutdown feature which can be disabled by the user. The high data rate and immunity to cable inductance and capacitance makes an ideal linedriver. The small outline SOP package gives excellent thermal power dissipation, thus the usage in space limited applications is easy. Differential Output A Output A Differential Output B Output B Differential Output C Output C Differential Output D Output D - CMOS / TTL Data input CMOS / TTL Data input CMOS / TTL Data input CMOS / TTL Data input Tristate enable / disable Thermal shutdown disable Protection logic controller - short circuit shut down - Tristate and thermal logic control - undervoltage and power up reset - Transient and EMI protection OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com Datasheet Version 1.04 May.30.2000 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof Electrical characteristics All voltage values are referenced to GND (GND = 0V). Unless stated otherwise all signals are assumed to be high active. Table 1 Absolute Maximum Ratings Parameter DC supply voltage DC input voltage DC input current Output voltage Driver output current (see cable model) Storage and operating temperature range Junction temperature Lead temperature Power dissipation: OL7272 SOIC16NB: Rth j-a = 111.8 K/W Symbol VCCD VIN IIN VOUT IOUT TSTGOP TJ TL PD soldering, 10s TJ = 150 C pulse peak/average -55 -0.3 Condition Min -0.3 -0.3 Max 36.0 VCC + 0.3 10 VCC + 0.3 1500/120 +125 +150 +260 581 1 2 Unit V V mA V mA C C C mW Table 2 Recommended Operating Conditions Parameter DC supply voltage DC data input voltage DC enable input voltage Data output voltage Driver output current (see cable model) Operating ambient temperature range Junction temperature range (lifetime) Symbol VCCD VIND VINEN 3 Condition Min 4.5 0 0 0 Max 30.0 VCCD 5.5 VCCD 100 Unit V V V V mA C C VOUTD IOUT TA TJ 5 4 -40 -55 +125 +140 NOTE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability (eq. hot carrier degradation). 1 2 3 4 5 Look at over-temperature protection Table 3 For surface mounting plastic packages. Valid for normal function. To disable automatic thermal shutdown, this pin should be set to 7,5 - 12 Volt. Limited by power dissipation. Driving capability at elevated temperatures will be limited by total package power dissipation. Special packages up to 125C can be supplied. OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 2/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof - Table 3 DC Characteristics (VCCD = 12.0 V, TA = 25 C, unless otherwise noted) Parameter Schmitt trigger inputs section Data input hysteresis Data input positive going threshold Data input negative going threshold Enable input hysteresis Enable input pos. going threshold Enable input neg. going threshold Data input leakage current - Low High Enable input leakage current - Low High Push-pull output drive section 6 - Low side switch outputs Low level output voltage Output resistance High-impedance output leakage current - High side switch outputs High level output voltage 6 Symbol VHYSD VTH+D VTH-D VHYSEN VTH+EN VTH-EN IILD IIHD IILEN IIHEN Condition VIL to VIH and VIH to VIL, ENABLE 0.8 V Min 0.2 0.8 0.2 0.8 -10.0 -10.0 -10.0 -10.0 Typ 0.5 1.7 1.2 0.5 1.7 1.2 Max Unit V V V V V V A A A A ENABLE 0.8 V ENABLE 0.8 V VIL to VIH and VIH to VIL, 2.4 2.4 +10.0 +10.0 +10.0 +10.0 ENABLE 0.8 V ENABLE 0.8 V VOLB VOLT 7 RDSON IOZ VOHB VOHT 7 RDSON IOZ VCCD = 4.75 V, ILOAD = 20mA ENABLE 0.8 V VCCD = 30 V, ILOAD = 30mA, ENABLE 0.8 V ILOAD = 30 mA VCCD = 30.0 V, 0.3 0.4 13 -10.0 4.2 29.2 -10.0 1.5 1.5 1.5 1.5 5.0 0.2 0.1 3.5 3.6 5 +165 +135 VCCD -0.4 VCCD -0.6 ENABLE 2.4 V 0.5 0.5 20 +10.0 V V A V V A mA mA mA mA V mA V V V s VCCD = 4.75 V, ILOAD = -20 mA,ENABLE 0.8V VCCD = 30V,ILOAD = -30mA, ENABLE 0.8 V Output resistance High-impedance output leakage current Supply parameters section 8 VCCD supply current IDB(en) IDT(en) IDB(dis) IDT(dis) Internal supply voltage VCCI 9 Quiescent current ICCQ Low voltage reset section Hysteresis for under-voltage reset Under-voltage reset negative going threshold (active) Under-voltage reset positive going threshold (inactive) ILOAD = -30mA VCCD = 30.0 V, ENABLE 2.4 V 20 30 +10.0 5.0 5.0 3.0 3.0 5.5 VCCD = 5.0 V, ENABLE 0.8 V VCCD = 30.0 V, ENABLE 0.8 V VCCD = 5.0 V, ENABLE 2.4 V VCCD = 30.0 V, ENABLE 2.4 V ICCIE = 5.0 mA VIN = 2.4 V or 0.8 V VHYSLVR VTH-LVR VTH+LVR tFILLVR TJOP TJRP 10 4.5 3.3 3.4 3.7 3.8 Under-voltage reset filter time Over-temperature protection section Over-temp. operate point (junction) Over-temp. release point (junction) +185 +125 C C 6 7 9 Either the low or high side switch is active at a time. Values will not be part of the production test but guaranteed by design. This is measured per input with all other inputs held at VCCI or GND. Value will not be part of the production test but guaranteed by design. 10 OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 3/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof - Table 4 AC Characteristics (VCCD = 12.0 V, TA = 25 C, Cable capacitance 1000pF, unless otherwise noted) Parameter Disable delay time Enable delay time Propagation delay from 50% point of rising edge of input pulse to zero crossing of differential outputs (see Figure 2) Propagation delay from 50% point of falling edge of input pulse to zero crossing of differential outputs (see Figure 2) Output rise time (see Figure 1) Symbol tOFF tON tPLH VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V CLOAD = 1000 pF VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V = 1000 pF VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V = 1000 pF VCCD = 5.0 V VCCD = 12.0 V VCCD = 24.0 V = 1000 pF Condition Min Typ 100 76 64 74 100 70 80 100 42 110 120 32 62 84 Max 200.0 200.0 200.0 200.0 330.0 280.0 280.0 330.0 200.0 350.0 380.0 200.0 350.0 380.0 Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns tPHL CLOAD tR 11 CLOAD Output fall time (see Figure 1) tF 16 CLOAD VIH VTH+ Input VIL VOH Output VOL 10% tR tF 10% VTH- VIH 50% Input VIL 90% 90% 50% tPLH VOH Output VOL VOH 50% tPHL 50% Figure 1 Definition of Output Rise and Fall Time OutputVOL tPHL 50% 50% tPLH VCCD Figure 2 Timing diagram with typical asynchronous propagation delays Output+ Figure 3 AC Test Circuit CL = 1.000pF Input 1/4 OL7272 OutputC L C L 11 Measured from 10% to 90% of the Output signal only with capacitive load on each output pin to ground (see Figure 3). OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 4/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof Mechanical characteristics Package Dimensions Symbol SOIC16NB (150 mil) Min Typ 1.27 (50) 8 Max 10.0(0,393) 4.00(0,157) 6.20(0,244) 1.75(0,069) 0.25(9,8) 0.51(20) 1.27(50) - Unit D E1 E A A1 b e L 9.80(0.385) 3.80(0,149) 5.80(0,228) 1.35(0,053) 0.10(3,9) 0.33(12,9) 0.40(15) - mm(Inch) mm(Inch) mm(Inch) mm(Inch) mm(mil) mm/(mil) mm/(mil) mm/(mil) Form of delivery and order code: SOIC16NB Antistatic tubes containing 50 pcs part no. OL7272 Tape & Reel order part no. OL7272 TR A demoboard with 2 line drivers plus connectors and status LEDs is available with order code OL7272 Demo For space critical applications custom design packages, i.e. with 2 or more driver chips in one package, can be designed at customer request. Please email OPTOLAB at sales@Optolab.com Notes: For hybrid applications this driver is also available as chip. Please contact us for further details. For space restricted applications there is a smaller package available, please see datasheet OL2068 OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 5/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name A IN A A- nc B- B B IN GND C IN C C- ENABL E D- D D IN VCCD I/O Type INPUT OUTPUT OUTPUT Not connected OUTPUT OUTPUT INPUT GROUND INPUT OUTPUT OUTPUT INPUT OUTPUT OUTPUT INPUT SUPPLY in Function Input Driver A Buffered tri-state Output Driver A Inverted tri-state Output Driver A No function Inverted tri-state Output Driver B Buffered tri-state Output Driver B Input Driver B Ground Input Driver C Buffered tri-state Output Driver C Inverted tri-state Output Driver C Low active enable Pin for all tri-state Output Drivers Inverted tri-state Output Driver D Buffered tri-state Output Driver D Input Driver D 4.5 V to 30 V Driver voltage A IN A Anc BB B IN GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCCD D IN D DENA CC C IN OL7272 VCCD 4,5 - 30 V A IN A Anc BB B IN GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 D IN D DENA CC C IN 100nf OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 6/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof Functional description The main contents of this new CMOS power linedriver are four identical blocks (systems A to D) with each a CMOS/TTL Schmitt Trigger Input ( can be driven at up to Vdd as well ) and high power differential buffered and inverted outputs. With the low active ENABLE pin it is possible to switch off all eight outputs (high-impedance state), thus this driver can be used in industrial bus systems. In some rare applications it might be useful to disable the overtemperature shutdown. This can be done by setting the ENABLE pin to a level between >7,5 V and <12 V. In this case the whole protection of the IC is disabled ! In case of any short circuits or thermal overdrive, the driver might be destroyed ! An internal ultra low drop voltage regulator with typical 5.0 V supplies the internal logic to reduce power dissipation. The over-temperature protection block is placed in the center of the chip. The thermal shutdown will be activated, when a overload condition (i.e. short circuit) has exceeded the over-temperature detection threshold. In this case automatically all output drivers are switched off. After the chip has cooled down ( a few milliseconds ) it automatically re-activates all functions. In case the short circuit is still present, it switches off again and the same cycle starts from the beginning. By using this linedriver, the field returns of systems, which are accidentally shorted and blown by the endusers, are dramatically reduced. The OL7272 is pin compatible to a couple of popular other linedrivers like 26xx31, ET7272 etc. Power supply The internal power supply is designed as a voltage regulator with a typical output voltage VCCI = 5.0 V. The minimal voltage drop across the regulator transistors could not be lower than 0.3 V. Under-voltage reset If the system is switched on, the status of the linedriver is, for a few microseconds, undefined. The same happens, if heavy power supply failures occur. To avoid wrong data transmitted, there is a supply voltage watchdog implemented. The under-voltage reset block contains a comparator. The voltage VCCI will be always compared with a reference voltage, provided by an internal bandgap cell. If after a filter time (tFILLVR ~ 5 s) VCCI drops below the typical voltage threshold of 3.5 V the output signal of this block switches off all output drivers to the high-impedance state until minimum 3.6 V are reappearing. ESD / EMI The chip is an ESD sensitive device and should be handled according to guideline EN100015 / part 1 (The Protection of ESD Sensitive Devices). All pins are ESD protected according to ESD standard MIL883, method 3015.7 (human body model). Unused Inputs should be connected to GND, as well as the pin ENABLE in case this function is not used. This will reduce the quiescent supply current. Life support clause The schematics and in general the linedriver is not intended for use in life support appliances, critical components or systems without the express written consent of Optolab Microsystems GmbH. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 7/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof Functional blocks Figure 8 High voltage Data inputs All Data input pins with Schmitt trigger characteristics on CMOS/TTL level can handle input voltages up to Vdd. The input circuitry will be powered by an internal low drop voltage regulator. Figure 9 Push-pull Data outputs For minimizing cross talk and maintaining the very high switching speed each driver stage has it's own level shift pre-driver. Therefore the digital waveform characteristics has a superior frequency response. Over-temperature protection An over-temperature detection and protection is implemented to prevent the output drivers from overheating and being destroyed. If the temperature increases with growing power dissipation and the junction temperature exceeds the absolute maximum value with typical TJOP ~ 165 C then this condition causes the thermal shutdown by switching off all output drivers to their high-impedance state. After cooling down below the release point the driver will continue his operation. Over temperature disable The only way to realize this function without a separate pin is the use of a special voltage range on the ENABLE pin. VCCI VCCI VCCI VCCD VCCI VCCI VCCI Data Input VCCD Pegel shifter VCCD Tristate Data Output Figure 10 ENABLE input with temp. disable signal generation The implementation of one voltage threshold above the valid functional range allows the realization of an additional function. Again - by using this mode the linedriver is no longer protected ! If there is a voltage > 7,5V and < 12V applied to the ENABLE pin, the temperature shutdown will be disabled. ENABLE_ COMP Test Mode 2 Test Mode 1 COMP OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 8/9 www..com OL7272 Industrial 30 Volt 4-Channel Differential Power Linedriver - short circuit proof Linedriver applications For differential linedriver application it is recommended to use shielded twisted pair cable. Unfortunately this type of cable is not widely used. A more realistic load circuit is therefore shown in Figure 13. A long cable model is shown in Figure 14. V V CC Figure 12 Twisted Pair transmission lines Input 1/4 OL7272 Output+ t itd Outputi li Output Figure 13 Load circuit for differential transmission Lines RL 120 5V 350 12 V 700 24 V Output+ VCCD VCCD VCCD / RL ~ 30 mA CL_DIF = 0.5 * CL RL CL_DIF RL Output- VCCD CL RL RL CL 2nF A 1 1nF B 1 2nF 1 1 2nF 1 1nF 1 2nF 2nF 1 1nF 1 2nF 2nF 1 1nF 1 2nF 2nF AO 1nF RL BO 2nF Parameter RL 225 1 k Condition VCCD 4.5 V 30 V ILOAD 20 mA 30 mA Figure 14 Long cable model ( 100 m / 330 ft ) for differential transmission lines Linedrivers may be used in parallel to drive higher loads. For engineering purpose there is an demo board available, please contact factory Optolab Microsystems GmbH reserves the right to change and update this specification at any time without giving notice OPTOLAB Microsystems GmbH * Haarbergstr. 61 * 99097 Erfurt / Germany * Tel. +49-361-422906-0 * Fax +49-361-422906-50 * www.optolab.com 9/9 |
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