ADVANCED LINEAR DEVICES, INC. ALD2302A/ALD2302 DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER GENERAL DESCRIPTION FEATURES The ALD2302A/ALD2302 are monolithic precision high performance dual voltage comparators built with advanced silicon gate CMOS technology. The primary features are: very high typical input impedance of 1012 Ω; low input bias current of 10pA; fast response time of 180ns; very low power dissipation of 175µA per comparator; and single (+5V) or dual (±5V) power supply operation. • • • • The input voltage range includes ground, which makes these comparators ideal for single supply low level signal detection with high source impedance. The outputs can source and sink current allowing for application flexibility. They can be used in either wired-OR connection without pull-up resistor or push-pull configuration. The ALD2302A/ ALD2302 can also be used in wired-OR connection with other open drain circuits such as the ALD2301/ALD2303 voltage comparators. The ALD2302A/ALD2302 voltage comparators are ideal for a great variety of applications, especially in low level signal detection circuits which require low standby power and high output current. For quad packages, use the ALD4302 quad voltage comparator. • • • • • • • • • Guaranteed to drive 200Ω loads Fanout of 30LS TTL loads Low supply current of 175µA each comparator Pinout of LM193 type industry standard comparators Extremely low input bias currents -- 10pA Virtually eliminates source impedance effects Low operating supply voltage of 4V to 12V Single (+5V) and dual supply (±5V) operation High speed for both large and small signals -180ns for TTL inputs and 400ns for 20mV overdrive CMOS, NMOS and TTL compatible Push-pull outputs-current sourcing/ sinking High output sinking current -- 60mA Low supply current spikes PIN CONFIGURATION APPLICATIONS • PCMCIA instruments • MOSFET driver • High source impedance voltage comparison circuits • Multiple limit window comparator • Power supply voltage monitor • Photodetector sensor circuit • High speed LED driver • Oscillators • Battery operated instruments • Remote signal detection • Multiple relay drivers OUT 1 1 8 V+ -IN 1 2 7 OUT 2 +IN 1 3 6 -IN 2 GND 4 5 +IN 2 TOP VIEW DA, PA, SA PACKAGE BENEFITS • • • • On-chip input and output buffers Precision voltage comparison capability Eliminate need for second power supply Eliminate pull-up resistor BLOCK DIAGRAM (8) V+ INVERTING INPUT -IN 1 (2) ORDERING INFORMATION Operating Temperature Range * -55°C to +125°C 0°C to +70°C 0°C to +70°C (1) OUT 1 NONINVERTING INPUT +IN 1 (3) V+ 8-Pin CERDIP Package 8-Pin Small Outline Package (SOIC) 8-Pin Plastic Dip Package ALD2302A DA ALD2302 DA ALD2302A SA ALD2302 SA ALD2302A PA ALD2302 PA INVERTING INPUT -IN 2 (6) (7) OUT 2 NONINVERTING INPUT +IN 2 (5) (4) GND * Contact factory for industrial temperature range © 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 PA, SA package DA 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 2302A Symbol Voltage Supply VS V+ Supply Current IS Voltage Gain AVD Input Offset Voltage VOS 0.5 1.0 2.0 1.5 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 2302 Parameter ±2 4 350 10 Max Min ±6 12 ±2 4 500 100 VOL Low Level Output Current IOL 24 60 24 High Level Output Voltage VOH 3.5 4.5 3.5 Response Time 2 Notes: 1 2 tRP Unit Conditions ±6 12 V V Dual Supply Single Supply 500 µA RLOAD = ∞ V/mV RLOAD ≥15KΩ 4.0 5.0 mV RLOAD =1.5KΩ 0°C ≤ TA ≤ 70°C 10 200 800 pA 0°C ≤ TA ≤ 70°C 10 200 1000 pA 0°C ≤ TA ≤ 70°C 100 V+ -1.5 -0.3 Low Level Output Voltage Test Max 350 10 V+ -1.5 -0.3 Typ V V ISINK =12mA VINPUT =1V Differential 60 mA VOL =1.0V 4.5 V IOH = -2mA 400 400 ns 180 180 ns 0.18 0.4 0.18 0.4 CL =15pF 100mV Input Step/20mV Overdrive CL = 15pF TTL- Level Input Step Consists of junction leakage currents Sample tested parameters ALD2302A/ALD2302 Advanced Linear Devices 2 TYPICAL PERFORMANCE CHARACTERISTICS TRANSFER FUNCTION SATURATION VOLTAGE vs. TEMPERATURE +6.0 VS = ± 2.5V I SINK = 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 0.0 -6.0 0 -55 -25 0 25 50 75 100 -2.5 125 COMMON - MODE VOLTAGE REFERRED TO SUPPLY VOLTAGE INPUT VOLTAGE (mV) 0.5 VS = ± 2.5 V -0.5 -1.0 ≈ ≈ 0.5 V-0.5 -55 -25 0 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES 25 50 75 100 OUTPUT VOLTAGE (V) COMMON - MODE VOLTAGE LIMITS (V) TEM PERATURE (°C) V+ 0 VIN V+ + - 100 0V ≈ +2.5 20mV 0.0 50mV 10mV -2.5 125 0.0 0.1 0.2 INPUT VOLTAGE (mV) 100 0.6 0.7 TA = 25°C VS = ±2.5V VIN ≈ 0V +2.5 85°C 25°C -25°C -55°C 0.3 0.0 60 V+ + - 125°C VOUT ≈ V- 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) ALD2302A/ALD2302 0.5 0 0.9 OUTPUT VOLTAGE (V) OUTPUT SATURATION VOLTAGE (V) 1.2 45 0.4 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES VS = ±2.5V 30 0.3 TIM E (µs) 1.5 15 ≈ TTL SATURATION VOLTAGE vs. SINK CURRENT 0 TA = 25°C VS = ±2.5V VOUT V- TEMPERATURE (°C) 0.6 +2.5 0.0 DIFFERENTIAL INPUT VOLTAGE (mV) Advanced Linear Devices 3 TYPICAL PERFORMANCE CHARACTERISTICS TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE SUPPLY CURRENT vs. TEMPERATURE 550 500 VS = ±2.5V No Load All comparators 500 TA = 25°C RL = ∞ + SUPPLY CURRENT (µA) SUPPLY CURRENT ( µA) V+ 400 300 200 100 450 400 350 300 250 200 2.0 6.0 4.0 12.0 10.0 8.0 -55 0 -25 SUPPLY VOLTAGE (V) 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 4 TA = 25°C 2 0 -2 -4 -6 -3 -55 -25 0 25 50 75 100 2 125 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 OUTPUT LOW VOLTAGE (V) OUTPUT HIGH VOLTAGE FROM V+ (V) 25 TEMPERATURE (°C) TA = 25°C IOH = -2mA V+ -0.5 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 4 ALD2302A/ALD2302 6 8 SUPPLY VOLTAGE (V) 10 12 Advanced Linear Devices 2 4 6 8 SUPPLY VOLTAGE (V) 10 12 4 TYPICAL APPLICATIONS DOUBLE DUAL LIMIT WINDOW COMPARATOR ZERO CROSSING DETECTOR +3V ALD2302 50K +12V +12V VOUT VIN + 50K -5V +12V VH2 + 1/2 ALD2302 VH1 + +12V MULTIPLE RELAY DRIVE +5V 47K VIN +12V +5V + VL1 VREF VIN + + 1/2 ALD2302 VL2 50K ALD2302 VL1 and VH1 first limit window send warning VL2 and VH2 second limit window execute system cutoff VOLTAGE LEVEL TRANSLATOR V+ = +10V VREF VOUT VIN + 1/2 ALD2302 VREF = 1.4V for TTL input VREF = V+ 2 for CMOS input Output VOUT swings from rail-to-rail ALD2302A/ALD2302 Advanced Linear Devices 5 TYPICAL APPLICATIONS PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER +12V +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 of the same load. N - Channel VN 01 Power MOSFET 10K ALD2302 TIME DELAY GENERATOR V+ RF1 1/2 ALD 2302 1/2 ALD 2302 V1 V+ VREF VIN + RT 1/2 ALD 2302 RF2 V2 + + CT RF3 1/2 ALD 2302 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 ALD2302 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. The 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. ALD2302A/ALD2302 Advanced Linear Devices 6