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| ADVANCED LINEAR DEVICES, INC. ALD4302A/ALD4302 QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER GENERAL DESCRIPTION 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 ; low input bias current of 10pA; fast response time of 120ns; very low power dissipation of 150A 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 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. 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 200 loads Fanout of 30 LS TTL loads Low supply current of 150A 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 APPLICATIONS * 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 PIN CONFIGURATION 02 01 V+ -IN 1 +IN 1 -IN 2 +IN 2 1 14 03 04 GND +IN 4 -IN 4 +IN 3 -IN 3 2 13 3 4 12 11 5 10 6 9 7 8 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 ORDERING INFORMATION -55C to +125C 14-Pin CERDIP Package ALD4302A DB ALD4302 DB Operating Temperature Range* 0C to 70C 0C to +70C 14-Pin Small Outline Package( SOIC) ALD4302A SB ALD4302 SB 14-Pin Plastic Dip Package ALD4302A PB ALD4302 PB + (14) OUT 3 + (13) OUT 4 + * Contact factory for industrial temperature range (12) (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 PB, SB package DB 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 4302A 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 1.5 3 600 Typ Max 6 12 1000 Min 1.5 3 600 4302 Typ Max 6 12 1000 Unit V V A Test Conditions Dual Supply Single Supply RLOAD = RLOAD 15K AVD 30 100 30 100 V/mV VOS 5 10 mV RLOAD =1.5K IOS 10 200 800 200 1000 10 200 800 200 1000 pA 0C TA 70C 0C TA 70C 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 VOH 3.5 4.5 3.5 4.5 V IOH = -2mA tRP 400 400 ns RL = 5.1K CL = 15pF 100mV Input Step/5mV Overdrive RL = 5.1K CL = 15pF TTL- Level Input Step 120 120 ns Notes: 1 2 Consists of junction leakage currents Sample tested parameters ALD4302/ALD4302 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 ISINK = 50mA +6.0 TA = 25C VS = 6V RL = 5.1K 0.0 -6.0 -2.5 0.0 DIFFERENTIAL INPUT VOLTAGE (mV) +2.5 TEM PERATURE (C) COMMON - MODE VOLTAGE REFERRED TO SUPPL VOLTAGE Y 0.5 RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES INPUT VOLTAGE (mV) 0 100 VIN V+ VOUT COMMON - MODE LIMITS (V) V+ -0.5 -1.0 0.5 V-0.5 -55 VS = 2.5V +2.5 + 0V V- TA = 25C VS = 2.5V 5mV 10mV OUTPUT VOLTAGE (V) TTL 50mV 0.0 20mV -2.5 0.0 0.1 0.2 0.3 0.4 -25 0 25 50 75 100 125 0.5 0.6 0.7 TEMPERATURE (C) TIM E (s) SATURATION VOL TAGE vs. SINK CURRENT INPUT VOLTAGE (mV) 1.5 VS = 2.5V RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES 100 0 TA = 25C VS = 2.5V VIN V+ OUTPUT SATURATION VOLTAGE (V) 1.2 0.9 0.6 0.3 0.0 0 15 30 45 60 75 125C 85C +2.5 0V + V- VOUT 5mV 10mV 20mV 50mV OUTPUT VOLTAGE (V) 25C -25C -55C TTL 0.0 -2.5 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 OUTPUT SINK CURRENT (mA) TIM E (s) ALD4302/ALD4302 Advanced Linear Devices 3 TYPICAL PERFORMANCE CHARACTERISTICS TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE 1000 SUPPLY CURRENT vs. TEMPERATURE V+ SUPPLY CURRENT ( A) SUPPLY CURRENT (A) 1000 800 600 400 200 2.0 + TA = 25C RL = 900 800 700 600 500 400 300 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 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 OUTPUT HIGH VOLTAGE vs. SUPPLY VOLTAGE OUTPUT HIGH VOLTAGE FROM V+ (V) V+ -0.6 OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE 0.6 OUTPUT LOW VOLTAGE (V) V+ -0.5 V+ -0.4 V+ -0.3 V+ -0.2 V+ -0.1 V+ TA = 25C IOH = -2mA 0.5 0.4 0.3 0.2 0.1 0.0 TA = 25C IOL= 12mA 2 4 8 SUPPLY VOLTAGE (V) 6 10 12 2 4 6 8 SUPPLY VOLTAGE (V) 10 12 ALD4302/ALD4302 Advanced Linear Devices 4 TYPICAL APPLICATIONS ZERO CROSSING DETECTOR DOUBLE DUAL LIMIT WINDOW COMPARATOR +5V +12V +12V VH2 +12V VIN VOUT + -5V 1/4 ALD4302 50K + VH1 + +12V MULTIPLE RELAY DRIVE 47K VIN +5V +5V VREF VIN VL1 + + VL2 + 50K 1/4 ALD4302 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 VREF = 1.4V for TTL input = 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 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. 10K 1/4 ALD4302 TIME DELAY GENERATOR V+ RF1 1/4 ALD4302 V+ VREF VIN RT RF2 V1 1/4 ALD4302 + 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 |
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