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| ADVANCED LINEAR DEVICES, INC. ALD2303A/ALD2303 DUAL PRECISION MICROPOWER CMOS VOLTAGE COMPARATOR WITH DRIVER GENERAL DESCRIPTION The ALD2303A/ALD2303 is a precision monolithic high performance dual voltage comparator built with advanced silicon gate CMOS technology. It features very high typical input impedance of 10 12; low input bias current of 10pA; very low power dissipation of 7.5A per comparator; and single (+5V) or dual (5V) power supply operation. The input voltage range includes ground, making this comparator ideal for single supply low level signal detection with high source impedance. The ALD2303A/ALD2303 can be used in connection with other voltage comparator circuits such as the ALD2301/ALD2302/ALD4302 voltage comparators. The output can be connected to a higher external voltage than V +. The ALD2303A/ALD2303 is ideal for high precision micropower voltage comparator applications, especially low level signal detection circuits requiring low standby power, yet retaining high output current capability. APPLICATIONS * * * * * * * * * * * * Sensor detection circuits 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 FEATURES * * * * * * * * * * * * * 3V, 5V and 12V supply Guaranteed to drive 200 loads Fanout of 30LS TTL loads Guaranteed maximum supply current of 20A for each comparator Pinout of LM193 type industry standard comparators Extremely low input bias currents -- 10pA Virtually eliminates source impedance effects Single (+5V) and dual supply (5V) operation CMOS, NMOS and TTL compatible Open drain wired-OR outputs High output sinking current -- 60mA Low supply current spikes High gain -- 100V/mV PIN CONFIGURATION OUT 1 -IN 1 +IN 1 GND 1 2 3 4 TOP VIEW DA, PA, SA PACKAGE 8 7 6 5 V+ OUT 2 -IN 2 +IN 2 BENEFITS * Extremely low power and high precision combination * Built-in high input impedance buffer * Built-in output driver with up to 60mA sink current ORDERING INFORMATION Operating Temperature Range * -55C to +125C 0C to +70C 0C to +70C 8-Pin CERDIP Package ALD2303A DA ALD2303 DA Q8-Pin Small Outline Package (SOIC) ALD2303A SA ALD2303 SA 8-Pin Plastic Dip Package ALD2303A PA ALD2303 PA INVERTING INPUT -IN 1 (2) NONINVERTING INPUT +IN 1 (3) V+ INVERTING INPUT -IN 2 (6) NONINVERTING INPUT +IN 2 (5) (4) GND (7) OUT 2 (1) OUT 1 BLOCK DIAGRAM (8) V+ * Contact factory for industrial temperature range (c) 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 0C to +70C -55C to +125C -65C to +150C +260C OPERATING ELECTRICAL CHARACTERISTICS T A = 25C V+= +5V unless otherwise specified 2303A Parameter Voltage Supply Supply Current Voltage Gain Input Offset Voltage Input Offset Current 1 Input Bias Current 1 Common Mode Input Voltage Range 2 Low Level Output Voltage Low Level Output Current High Level Leakage Current Response Time 2 Symbol VS V+ IS Min 1.5 3 15 Typ Max 6 12 40 Min 1.5 3 15 2303 Typ Max 6 12 40 Unit V V A Test Conditions Dual Supply Single Supply RLOAD = RLOAD 15K AVD 10 100 10 100 V/mV VOS 0.5 1.0 2.0 200 800 200 1000 1.5 4.0 5.0 200 800 200 1000 mV RLOAD =1.5K 0C TA 70C 0C TA 70C 0C TA 70C IOS 10 10 pA IB 10 10 pA VICR -0.3 V+ -1.5 -0.3 V+ -1.5 V VOL 0.18 0.4 0.18 0.4 V ISINK =12mA VINPUT =1V Differential IOL 24 60 24 60 mA VOL =1.0V ILH 0.01 20 0.01 20 nA VOH = 5.0V tRP 6.5 6.5 s RL =50K CL = 15pF 10mV Input Step/10mV Overdrive RL = 50K CL = 15pF TTL- Level Input Step 5 5 s Notes: 1 2 Consists of junction leakage currents Sample tested parameters ALD2303A/ALD2303 Advanced Linear Devices 14 TYPICAL PERFORMANCE CHARACTERISTICS SATURATION VOLTAGE vs. TEMPERATURE 1.4 SATURATION VOLTAGE (V) TRANSFER FUNCTION 1.2 1.0 0.8 0.6 0.4 0.2 OUTPUT VOLTAGE (V) VS = 2.5V I SINK = 50mA +6.0 TA = 25C VS = 6V RL = 50K 0.0 -6.0 0 -55 -25 0 25 50 75 100 125 -2.5 0.0 DIFFERENTIAL INPUT VOLTAGE (mV) +2.5 TEMPERATURE (C) COMMON - MODE VOLTAGE LIMITS (V) COMMON - MODE VOLTAGE REFERRED TO SUPPL VOLTAGE Y 0.5 V+ -0.5 -1.0 0.5 V-0.5 -55 -25 0 25 50 75 100 125 VS = 2.5 V RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES INPUT VOLTAGE (mV) 0 V+ 100 VIN + 0V V- 50K TA = 25C VS = 2.5V VOUT OUTPUT VOLTAGE (V) +2.5 TTL 0.0 -2.5 0 1 2 3 4 5 6 7 10mV TEMPERATURE (C) TIM E (s) SATURATION VOL TAGE vs. SINK CURRENT INPUT VOLTAGE (mV) 1.5 100 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES TA = 25C VS = 2.5V 50K OUTPUT SATURATION VOLTAGE (V) VS = 2.5V 1.2 0.9 125C 0.6 0.3 0.0 0 15 30 45 60 75 85C V+ 0 VIN + 0V V- VOUT +2.5 OUTPUT VOLTAGE (V) 25C -25C -55C TTL 0.0 -2.5 0 1 2 3 4 5mV 10mV 20mV 50mV 5 6 7 OUTPUT SINK CURRENT (mA) TIM E (s) ALD2303A/ALD2303 Advanced Linear Devices 15 TYPICAL PERFORMANCE CHARACTERISTICS TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE 10 RESPONSE TIME FOR REPRESENTATIVE SAMPLES tdLH VS = 2.5V TA = 25C V+ SUPPLY CURRENT ( A) 100 + RESPONSE TIME (s) TA = 25C RL = 10 5 1 0 2.0 4.0 6.0 8.0 10.0 12.0 50 100 SAMPLES 150 200 SUPPLY VOLTAGE (V) NORMALIZED INPUT OFFSET VOLTAGE vs. TEMPERATURE VCM = 0V VS = 2.5V INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE REPRESENTATIVE SAMPLES 6 INPUT OFFSET VOLTAGE (mV) +3 NORMALIZED INPUT OFFSET VOLTAGE (mV) +2 +1 0 -1 -2 -3 -55 -25 0 25 50 4 2 0 -2 -4 -6 TA = 25C 75 100 125 2 4 TEMPERATURE (C) 6 8 SUPPLY VOLTAGE (V) 10 12 RESPONSE TIME FOR REPRESENTATIVE SAMPLES 10 0.6 OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE OUTPUT LOW VOLTAGE (V) TA = 25C IOL= 12mA RESPONSE TIME (s) VS = 2.5V TA = 25C tdHL 5 0.5 0.4 0.3 0.2 0.1 0.0 0 50 100 SAMPLES 150 200 2 4 6 8 SUPPLY VOLTAGE (V) 10 12 ALD2303A/ALD2303 Advanced Linear Devices 16 TYPICAL APPLICATIONS ZERO CROSSING DETECTOR DOUBLE DUAL LIMIT WINDOW COMPARATOR +3V 50K VIN VOUT +12V VH2 ALD2303 +12V +12V + -3V 1/2 ALD2303 50K + VH1 + +12V VIN 47K MULTIPLE RELAY DRIVE +12V + VL1 +5V VREF VIN +5V + + 50K VL2 1/2 ALD2303 ALD2303 VL1 and VH1 first limit window send warning VL2 and VH2 second limit window execute system cutoff VOLTAGE LEVEL TRANSLATOR V+ = +10V VREF VIN 50K VOUT + 1/2 ALD2303 VREF VREF = 1.4V for TTL input = V+ 2 for CMOS input Output VOUT swings from rail-to-rail ALD2303A/ALD2303 Advanced Linear Devices 17 TYPICAL APPLICATIONS PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER +12V +12V 10K V1 VIN 40K +12V V2 R N - Channel VN 01 Power MOSFET R +12V P- Channel VP 02 Power MOSFET + 2A Source 2A Sink + R 50 K 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. 10K ALD2303 TIME DELAY GENERATOR V+ RF1 1/2 ALD2303 V+ 50K 1/2 ALD2303 V1 + RT RF2 1/2 ALD2303 V2 CT RF3 VREF VIN + + 1/2 ALD2303 V3 + 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. ALD2303A/ALD2303 Advanced Linear Devices 18 |
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