ADVANCED LINEAR DEVICES, INC. ALD4301A/ALD4301 QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH OPEN DRAIN DRIVER GENERAL DESCRIPTION APPLICATIONS The ALD4301A/ALD4301 is a monolithic high performance quad voltage comparator built with advanced silicon gate CMOS technology. It features very high typical input impedance of 10 12 Ω; low input bias current of 10pA; fast response time of 300ns; very low power dissipation of 55µA per comparator; high output drive and single +5V or dual ±5V power supply operation. • High source impedance voltage comparison circuits • Dual/Quad limit window comparator • Power supply voltage monitor • Photo-detector sensor circuit • Relay or LED driver • Oscillators • Battery operated instruments • Remote signal detection The input voltage range includes ground, making this comparator ideal for low level signal detection with high source impedance. The outputs are open-drain configuration, allowing maximum application flexibility. The outputs can be connected to a higher external voltage than V + and used in a wired-OR connection with other open drain circuits such as ALD2301/ALD2303. They can also be used with push-pull output types such as ALD2302/ALD4302 voltage comparators simultaneously with open drain comparators using a common V+. The ALD4301A/ ALD4301 is ideal for a great variety of voltage comparator applications, especially detection circuits requiring very low input currents and low standby power, yet retaining high output current capability. FEATURES • • • • • • • • • • • • • Fanout of 30 LS TTL loads Low supply current of 55µA/comparator typical Pinout/Functional equivalent to LM393 types Extremely low input bias currents -- 10pA typical Virtually eliminates source impedance effects Low operating supply voltage of 3V to 12V Single +5V and dual supply ±5V operation High speed for both large signal and low level signals -- 300ns typical for TTL inputs CMOS, NMOS and TTL compatible Wired-OR open drain outputs High output sinking current -- 60mA typical Low supply current spikes High gain ORDERING INFORMATION Operating Temperature Range * -55°C to +125°C 0°C to +70°C 0°C to +70°C 14-Pin CERDIP Package ALD 4301ADB ALD 4301DB 14-Pin Small Outline Package (SOIC) ALD4301ASB ALD4301SB 14-Pin Plastic Dip Package ALD4301APB ALD4301PB PIN CONFIGURATION 02 1 14 03 01 2 13 04 V+ 3 12 GND -IN 1 4 11 +IN 4 +IN 1 5 10 -IN 4 -IN 2 6 9 +IN 3 +IN 2 7 8 -IN 3 DB, PB, SB PACKAGE BLOCK DIAGRAM V+ INVERTING INPUT - IN 1 (4) - NONINVERTING INPUT + IN 1 (5) + INVERTING INPUT - IN 2 (6) - NONINVERTING INPUT + IN 2 (7) + INVERTING INPUT - IN 3 (8) - NONINVERTING INPUT + IN 3 (9) + INVERTING INPUT - IN 4 (10) - NONINVERTING INPUT + IN 4 (11) + (3) (2) OUT 1 (1) OUT 2 (14) OUT 3 (13) OUT 4 * Contact factory for industrial temperature range (12) © 2005 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com ABSOLUTE MAXIMUM RATINGS Supply voltage, V+ Differential input voltage range Power dissipation Operating temperature range PB, SB package DB package Storage temperature range Lead temperature, 10 seconds 13.2V -0.3V to V+ +0.3V 600 mW 0°C to +70°C -55°C to +125°C -65°C to +150°C +260°C OPERATING ELECTRICAL CHARACTERISTICS TA = 25°C V+= +5V unless otherwise specified 4301A Parameter Symbol Voltage Supply V+ Supply Current IS Voltage Gain AVD Input Offset Voltage VOS Input Offset Current 1 IOS 0.1 30 Input Bias Current 1 IB 0.1 30 Common Mode Input Voltage Range 2 VICR Min Typ 4301 3 ±1.5 12 ±6 220 50 Max Min Max Unit Conditions 12 ±6 V V Single supply Dual supplies 350 µA No load V/mV RLOAD ≥ 15KΩ 10 mV RLOAD ≥ 1.5KΩ 0.1 30 pA 0.1 30 pA V+ -1.5 V 0.4 V I SINK =12mA VINPUT =1V Differential mA VOL =1.0V nA VOH = 5.0 V 3 ±1.5 350 150 Typ 220 50 150 5 V+-1.5 -0.3 Test -0.3 Low Level Output Voltage VOL Low Level Output Current IOL High Level Leakage Current ILH 0.1 tRP 650 650 ns 300 300 ns Response Time 2 Notes: 1 2 0.15 24 0.4 60 0.15 24 20 60 0.1 Consists of junction leakage currents Sample tested parameters ALD4301A/ALD4301 Advanced Linear Devices 20 RL =5.1KΩ CL = 15pF 100mV Input Step/5mV Overdrive RL = 5.1KΩ CL = 15pF TTL- Level Input Step TYPICAL PERFORMANCE CHARACTERISTICS SATURATION VOLTAGE vs.TEMPERATURE TRANSFER FUNCTION +6.0 VS = ± 2.5V ISINK = 50mA 1.2 OUTPUT VOLTAGE (V) SATURATION VOLTAGE (V) 1.4 1.0 0.8 0.6 0.4 0.2 TA = 25°C VS = ±6V RL = 5.1K 0.0 -6.0 0 -25 0 25 50 75 100 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES INPUT VOLTAGE (mV) COMMON - MODE VOLTAGE REFERRED TO SUPPLY VOLTAGE VS = ± 2.5V V+ -0.5 ≈ ≈ 0.5 V-0.5 -55 -25 0 25 50 75 100 0 V+ VIN 100 ≈ 0V VOUT 5mV 50mV 0.0 10mV 20mV 2mV -2.5 0.0 125 0.2 0.4 INPUT VOLTAGE (mV) 1.2 0.9 100 1.0 1.2 1.4 TA = 25°C VS = ±2.5V V+ VIN 0 5.1K + - ≈ 125°C 0V VOUT V- 2mV +2.5 OUTPUT VOLTAGE (V) 85°C 25°C -25°C -55°C 0.0 ALD4301A/ALD4301 0.8 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES VS = ±2.5V 0 0.6 TIM E (µs) 1.5 0.3 ≈ V- +2.5 SATURATION VOLTAGE vs. SINK CURRENT 0.6 TA = 25°C VS = ±2.5V 5.1K + - TEMPERATURE (°C) OUTPUT SATURATION VOLTAGE (V) +2.5 0.0 DIFFERENTIAL INPUT VOLTAGE (mV) 0.5 -1.0 -2.5 125 TEM PERATURE (°C) OUTPUT VOLTAGE (V) COMMON - MODE VOLTAGE LIMITS (V) -55 15 30 45 60 OUTPUT SINK CURRENT (mA) 5mV 10mV 20mV 50mV 0.0 -2.5 75 0.0 0.2 0.4 0.6 0.8 TIM E (µs) Advanced Linear Devices 1.0 1.2 1.4 ≈ TYPICAL PERFORMANCE CHARACTERISTICS TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE SUPPLY CURRENT vs. TEMPERATURE 200 V+ + VS = ±2.5V No Load All comparators 180 TA = 25°C RL = ∞ SUPPLY CURRENT (µA) SUPPLY CURRENT ( µA) 160 140 120 100 80 160 140 120 100 80 60 2.0 6.0 4.0 12.0 10.0 8.0 -55 -25 SUPPLY VOLTAGE (V) 0 50 25 100 75 125 TEMPERATURE (°C) INPUT OFFSET VOLTAGE vs. TEMPERATURE 3.0 OFFSET VOLTAGE (mV) 2.8 VCM = 0V VS = ± 2.5V 2.6 2.4 2.2 2.0 1.8 -55 0 -25 50 25 75 100 125 TEMPERATURE (°C) TYPICAL APPLICATIONS QUAD LIMIT WINDOW COMPARATOR QUAD LIMIT PHOTO-DETECTOR MONITOR VExternal V+ V+ 1/2 ALD4301 VREF(HIGH) V+ BUZZER RLOAD + VOLTAGE COMPARATOR WITH COMPLEMENTARY OUTPUTS + Q - 1/2 ALD4301 1/2 ALD4301 LED - VLIMIT2 VOUT + - + VIN VIN VLIMIT 1 LIGHT VREF(LOW) VREF 1/2 ALD4301 PHOTODETECTOR + 1/2 ALD4301 MINIMUM RLOAD = 1.5KΩ OUTPUT HIGH FOR VIN < VREF(HIGH) AND VIN > VREF(LOW) LED turns on as photo-detector voltage reaches V LIMIT1. Both LED and horn turns on as photo-detector voltage reaches VLIMIT2. V EXTERNAL = +12V V+ = +5V. ALD4301A/ALD4301 Advanced Linear Devices + - Q 1/2 ALD4301 TYPICAL APPLICATIONS ZERO CROSSING DETECTOR DOUBLE DUAL LIMIT WINDOW COMPARATOR ALD4301 +3V +12V +12V +12V 50K VOUT VIN + 50K VH2 + -3V 1/4 ALD4301 VH1 + +12V VIN MULTIPLE RELAY DRIVE +5V +12V 47K + +5V VL1 VREF + VIN + VL2 50K 1/4 ALD4301 ALD4301 VL1 and VH1 first limit window send warning VL2 and VH2 second limit window execute system cutoff VOLTAGE LEVEL TRANSLATOR V+ = +10V 50K VREF VOUT VIN + 1/4 ALD4301 VREF = 1.4V for TTL input VREF = V+ 2 for CMOS input Output VOUT swings from rail-to-rail ALD4301A/ALD4301 Advanced Linear Devices TYPICAL APPLICATIONS PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER +12V +12V P- Channel VP 02 Power MOSFET +12V R 10K + V1 2A Source VIN 2A Sink 40K +12V R + V2 N - Channel VN 01 Power MOSFET 10K 1/2 ALD4301 R ≥ 50 KΩ This circuit eliminates crossover current in the complementary power transistors. The outputs can be used to source and sink different loads or tied together to provide push-pull drive of the same load. TIME DELAY GENERATOR V+ RF1 1/4 ALD4301 1/4 ALD4301 RELAY 3 V+ VREF VIN + RT RF2 1/4 ALD4301 RELAY 2 + + CT RF3 1/4 ALD4301 RELAY 1 + RF4 RELAY 1 turns off followed by RELAY 2 and then RELAY 3 with fixed sequence and time delays selectrd by ratios RF1, RF2 , RF3 and RF4. Design & Operating Notes: 1. In order to minimize stray oscillation, all unused inputs must be tied to ground. 2. The input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1 pA at room temperature. These currents are a function of ambient temperature, and would have to be considered in applications where very high source impedance or high accuracy are involved. 3. The high output sinking current of 60mA for each output offers flexibility in many applications, as a separate buffer or driver would not be necessary to drive the intended load. However, as the circuit normally operates close to ambient temperature due to its very low power consumption, thermal effects caused by large output current transients must be considered in certain applications. ALD4301A/ALD4301 Advanced Linear Devices