ADVANCED LINEAR DEVICES, INC. ALD4302A/ALD4302 QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER GENERAL DESCRIPTION APPLICATIONS The ALD4302 is a monolithic high performance quad voltage comparator built with advanced silicon gate CMOS technology. It features very high typical input impedance of 1012 Ω; low input bias current of 10pA; fast response time of 120ns; very low power dissipation of 150µA per comparator; and single +5V or dual ±5V power supply operation. • MOSFET driver • High source impedance voltage comparison circuits • Multiple limit window comparator • Power supply voltage monitor • Photo-detector sensor circuit • High speed LED driver • Oscillators • Battery operated instruments • Remote signal detection • Multiple relay drivers The input voltage range includes ground, making this comparator ideal for single supply low level signal detection with high source impedance. The outputs can source and sink current, allowing application flexibility, and can be used in either wired-OR connection without pull up resistor or push-pull configuration. The ALD4302 can be used in wired-OR connection with other open drain circuits such as the ALD2301 and ALD2303 voltage comparators. PIN CONFIGURATION The ALD4302 is ideal for a great variety of precision voltage comparator applications, especially low level signal detection circuits requiring low standby power, yet retaining high output current capability. FEATURES • • • • • • • • • • • • • Guaranteed to drive 200Ω loads Fanout of 30 LS TTL loads Low supply current of 150µA each comparator Extremely low input bias currents -- 10pA 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 and small signals 120ns for TTL inputs and 400ns for 5mV overdrive CMOS, NMOS and TTL compatible Push-pull outputs High output sinking current -- 60mA Low supply current spikes High gain -- 100V/mV 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+ ORDERING INFORMATION -55°C to +125°C Operating Temperature Range* 0°C to 70°C 0°C to +70°C 14-Pin CERDIP Package 14-Pin Small Outline Package( SOIC) 14-Pin Plastic Dip Package ALD4302A DB ALD4302 DB ALD4302A SB ALD4302 SB ALD4302A PB ALD4302 PB * Contact factory for industrial temperature range 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 (12) © 1998 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 4302A Symbol Voltage Supply VS V+ Supply Current IS Voltage Gain AVD Input Offset Voltage VOS Input Offset Current 1 IOS 10 200 800 Input Bias Current 1 IB 10 200 1000 Common Mode Input Voltage Range 2 VICR Min Typ 4302 Parameter ±1.5 3 600 30 Max Min ±6 12 ±1.5 3 1000 100 Typ Unit Conditions ±6 12 V V Dual Supply Single Supply µA RLOAD = ∞ V/mV RLOAD ≥15KΩ 10 mV RLOAD =1.5KΩ 10 200 800 pA 0°C ≤ TA ≤ 70°C 10 200 1000 pA 0°C ≤ TA ≤ 70°C V+ -1.5 V 0.4 V ISINK =12mA VINPUT =1V Differential 600 30 V+-1.5 1000 100 5 -0.3 Test Max -0.3 Low Level Output Voltage VOL Low Level Output Current IOL 24 60 24 60 mA VOL =1.0V High Level Output Voltage VOH 3.5 4.5 3.5 4.5 V IOH = -2mA 400 400 ns 120 120 ns Response Time 2 Notes: 1 2 tRP 0.18 0.4 0.18 RL = 5.1KΩ CL = 15pF 100mV Input Step/5mV Overdrive RL = 5.1KΩ CL = 15pF TTL- Level Input Step Consists of junction leakage currents Sample tested parameters ALD4302/ALD4302 Advanced Linear Devices 2 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 -55 -25 0 25 50 75 100 -2.5 125 DIFFERENTIAL INPUT VOLTAGE (mV) TEM PERATURE (°C) RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES COMMON - MODE LIMITS (V) 0.5 VS = ± 2.5V -0.5 -1.0 ≈ ≈ 0.5 V-0.5 -55 -25 0 25 50 75 100 OUTPUT VOLTAGE (V) INPUT VOLTAGE (mV) COMMON - MODE VOLTAGE REFERRED TO SUPPLY VOLTAGE V+ 0 VIN 100 ≈ +2.5 V+ 0V ≈ V- TTL 5mV 50mV 0.0 10mV 20mV -2.5 0.0 125 0.1 0.2 INPUT VOLTAGE (mV) 1.2 0.9 125°C 85°C 100 25°C -25°C -55°C 0.3 0.0 45 0 VIN 60 V+ + - ≈ 0.6 0V VOUT 0.7 ≈ V- 5mV 10mV 20mV 50mV TTL 0.0 -2.5 75 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 TIM E (µs) OUTPUT SINK CURRENT (mA) ALD4302/ALD4302 0.5 TA = 25°C VS = ±2.5V +2.5 OUTPUT VOLTAGE (V) OUTPUT SATURATION VOLTAGE (V) VS = ±2.5V 30 0.4 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES 1.5 15 0.3 TIM E (µs) SATURATION VOLTAGE vs. SINK CURRENT 0 TA = 25°C VS = ±2.5V VOUT + - TEMPERATURE (°C) 0.6 +2.5 0.0 Advanced Linear Devices 3 TYPICAL PERFORMANCE CHARACTERISTICS SUPPLY CURRENT vs. TEMPERATURE TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE 1000 + 1000 VS = ±2.5V No Load All comparators 900 TA = 25°C RL = ∞ SUPPLY CURRENT (µA) SUPPLY CURRENT ( µA) V+ 800 600 400 200 800 700 600 500 400 300 2.0 6.0 4.0 -55 12.0 10.0 8.0 0 -25 100 75 125 6 INPUT OFFSET VOLTAGE (mV) +3 NORMALIZED INPUT OFFSET VOLTAGE (mV) 50 INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE REPRESENTATIVE SAMPLES NORMALIZED INPUT OFFSET VOLTAGE vs. TEMPERATURE VCM = 0V VS = ±2.5V +2 +1 0 -1 -2 -3 TA = 25°C 4 2 0 -2 -4 -6 -55 -25 0 25 50 75 100 125 2 4 TEMPERATURE (°C) OUTPUT HIGH VOLTAGE vs. SUPPLY VOLTAGE 6 8 SUPPLY VOLTAGE (V) 10 12 OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE V+ -0.6 0.6 TA = 25°C IOH = -2mA V+ -0.5 OUTPUT LOW VOLTAGE (V) OUTPUT HIGH VOLTAGE FROM V+ (V) 25 TEMPERATURE (°C) SUPPLY VOLTAGE (V) V+ -0.4 V+ -0.3 V+ -0.2 V+ -0.1 V+ TA = 25°C IOL= 12mA 0.5 0.4 0.3 0.2 0.1 0.0 2 ALD4302/ALD4302 4 6 8 SUPPLY VOLTAGE (V) 10 12 Advanced Linear Devices 2 4 6 8 SUPPLY VOLTAGE (V) 10 12 4 TYPICAL APPLICATIONS ZERO CROSSING DETECTOR DOUBLE DUAL LIMIT WINDOW COMPARATOR +5V +12V +12V VOUT VIN + 50K +12V VH2 + -5V 1/4 ALD4302 VH1 + +12V 47K MULTIPLE RELAY DRIVE VIN + +5V +5V VL1 VREF VIN + + VL2 1/4 ALD4302 50K ALD4302 VL 1 and VH1 first limit window send warning. VL 2 and VH2 second limit window execute system cutoff. VOLTAGE LEVEL TRANSLATOR V+ = +10V VREF VOUT VIN + 1/4 ALD4302 VREF = 1.4V for TTL input VREF = V+ 2 for CMOS input Output VOUT swings from rail- to- rail ALD4302/ALD4302 Advanced Linear Devices 5 TYPICAL APPLICATIONS PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER +12V 1/4 ALD4302 +12V P- Channel VP 02 Power MOSFET +12V 10K + V1 2A Source VIN 2A Sink 40K +12V + V2 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. N - Channel VN 01 Power MOSFET 10K 1/4 ALD4302 TIME DELAY GENERATOR V+ RF1 1/4 ALD4302 1/4 ALD4302 V1 V+ VREF VIN + RT RF2 1/4 ALD4302 V2 + + CT RF3 1/4 ALD4302 V3 + RF4 Design & Operating Notes: 1. As each output sources up to 10mA in the output high state, the output stage of a wired-OR low output circuit must be able to sink this current and still provide desired output voltage levels. For TTL output levels, this consideration limits the number to a maximum of three ALD4302 outputs wired-OR together. 2. In order to minimize stray oscillation, all unused inputs must be tied to ground. 3. 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. 4. 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. ALD4302/ALD4302 Advanced Linear Devices 6