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| ADVANCED LINEAR DEVICES, INC. ALD2302A/ALD2302 DUAL PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER GENERAL DESCRIPTION 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; low input bias current of 10pA; fast response time of 180ns; very low power dissipation of 175A 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. 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 BENEFITS * * * * On-chip input and output buffers Precision voltage comparison capability Eliminate need for second power supply Eliminate pull-up resistor FEATURES * * * * * * * * * Guaranteed to drive 200 loads Fanout of 30LS TTL loads Low supply current of 175A 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 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 BLOCK DIAGRAM ORDERING INFORMATION ("L" suffix for lead free version) -55C to +125C 8-Pin CERDIP Package ALD2302ADA ALD2302DA Operating Temperature Range * 0C to +70C 0C to +70C 8-Pin Small Outline Package (SOIC) ALD2302ASA ALD2302ASAL ALD2302SA ALD2302SAL 8-Pin Plastic Dip Package ALD2302APA ALD2302APAL ALD2302PA ALD2302PAL (8) V+ 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 * Contact factory for industrial temperature range (c)2007 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 TA = 25C V+ = +5V unless otherwise specified 2302A 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 Output Voltage Response Time 2 Symbol VS V+ IS Min 2 4 350 Typ Max 6 12 500 Min 2 4 350 2302 Typ Max 6 12 500 Unit V V A Test Conditions Dual Supply Single Supply RLOAD = RLOAD 15K AVD 10 100 10 100 V/mV VOS 1.0 2.0 3.0 5.0 mV RLOAD =1.5K 0C TA 70C IOS 10 200 800 200 1000 10 200 800 200 1000 pA IB 10 10 pA 0C TA 70C VICR -0.3 V+ -1.5 -0.3 V+ -1.5 V 0C TA 70C VOL 0.18 0.4 0.18 0.4 V I SINK =12mA VINPUT =1V Differential IOL 24 60 24 60 mA VOL =1.0V VOH 3.5 4.5 3.5 4.5 V I OH = -2mA tRP 400 400 ns CL =15pF 100mV Input Step/20mV Overdrive CL = 15pF TTL- Level Input Step 180 180 ns Notes: 1 2 Consists of junction leakage currents Sample tested parameters ALD2302A/ALD2302 Advanced Linear Devices 2 TYPICAL PERFORMANCE CHARACTERISTICS SATURATION VOL TAGE vs. TEMPERATURE 1.4 TRANSFER FUNCTION SATURATION VOLTAGE (V) 1.0 0.8 0.6 0.4 0.2 0 -55 -25 0 25 50 75 100 125 OUTPUT VOLTAGE (V) 1.2 VS = 2.5V I SINK = 50mA +6.0 TA = 25C VS = 6V 0.0 -6.0 -2.5 0.0 DIFFERENTIAL INPUT VOLTAGE (mV) +2.5 TEM PERATURE (C) COMMON - MODE VOLTAGE LIMITS (V) COMMON - MODE VOLTAGE REFERRED TO SUPPL VOLTAGE Y INPUT VOLTAGE (mV) 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 0 VIN V+ 100 0V + V- VOUT TA = 25C VS = 2.5V OUTPUT VOLTAGE (V) +2.5 TTL 20mV 50mV 0.0 -2.5 0.0 10mV 0.1 0.2 0.3 0.4 0.5 0.6 0.7 TEMPERATURE (C) TIM E (s) SATURATION VOL TAGE vs. SINK CURRENT INPUT VOLTAGE (mV) 1.5 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES 100 0 VIN V+ 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 25C -25C -55C TA = 25C VS = 2.5V + 0V V- VOUT +2.5 OUTPUT VOLTAGE (V) TTL 0.0 -2.5 0.0 0.1 0.2 0.3 0.4 10mV 20mV 50mV 0.5 0.6 0.7 OUTPUT SINK CURRENT (mA) TIM E (s) ALD2302A/ALD2302 Advanced Linear Devices 3 TYPICAL PERFORMANCE CHARACTERISTICS TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE 550 SUPPLY CURRENT vs. TEMPERATURE V+ SUPPLY CURRENT ( A) SUPPLY CURRENT (A) 500 400 300 200 100 2.0 + TA = 25C RL = 500 450 400 350 300 250 200 VS = 2.5V No Load All comparators 4.0 6.0 8.0 10.0 12.0 -55 -25 0 25 50 75 100 125 SUPPLY VOLTAGE (V) TEMPERATURE (C) NORMALIZED INPUT OFFSET VOLTAGE vs. TEMPERATURE NORMALIZED INPUT OFFSET VOLTAGE (mV) VCM = 0V VS = 2.5V INPUT OFFSET VOLTAGE (mV) INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE REPRESENTATIVE SAMPLES 6 4 2 0 -2 -4 -6 TA = 25C +3 +2 +1 0 -1 -2 -3 -55 -25 0 25 50 75 100 125 2 4 TEMPERATURE (C) 6 8 SUPPLY VOLTAGE (V) 10 12 OUTPUT HIGH VOLTAGE vs. SUPPLY VOLTAGE OUTPUT HIGH VOLTAGE FROM V+ (V) V+ -0.6 V+ -0.5 V+ -0.4 V+ -0.3 V+ -0.2 OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE 0.6 TA = 25C IOH = -2mA OUTPUT LOW VOLTAGE (V) 0.5 0.4 0.3 0.2 0.1 0.0 TA = 25C IOL= 12mA V+ -0.1 V+ 2 4 8 SUPPLY VOLTAGE (V) 6 10 12 2 4 6 8 SUPPLY VOLTAGE (V) 10 12 ALD2302A/ALD2302 Advanced Linear Devices 4 TYPICAL APPLICATIONS ZERO CROSSING DETECTOR DOUBLE DUAL LIMIT WINDOW COMPARATOR +3V ALD2302 +12V 50K VIN VOUT +12V VH2 +12V + -5V 1/2 ALD2302 50K + VH1 + +12V MULTIPLE RELAY DRIVE 47K VIN +12V +5V VREF VIN +5V + VL1 + + 1/2 ALD2302 50K VL2 ALD2302 VOLTAGE LEVEL TRANSLATOR VL1 and VH1 first limit window send warning VL2 and VH2 second limit window execute system cutoff V+ = +10V VREF VOUT VIN + 1/2 ALD2302 VREF VREF = 1.4V for TTL input = 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 10K V1 VIN 40K +12V V2 +12V P- Channel VP 02 Power MOSFET + 2A Source 2A Sink + N - Channel VN 01 Power MOSFET 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 ALD2302 TIME DELAY GENERATOR V+ RF1 1/2 ALD 2302 V+ VREF VIN RT RF2 V1 1/2 ALD 2302 + 1/2 ALD 2302 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 |
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