ALD4302A_05 ALD | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 6

Technical content

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

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 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 10 12Ω ; low input bias current of 10pA; fast response time of 120ns; very low power dissipation of 150µA per compara- tor; 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. ADVANCED LINEAR D EVICES, INC. QUAD PRECISION CMOS VOLTAGE COMPARATOR WITH PUSH-PULL DRIVER ALD4302A/ALD4302 Operating Temperature Range* -55°C to +125°C0 °C to 70°C0 °C to +70°C 14-Pin 14-Pin 14-Pin CERDIP Small Outline Plastic Dip Package Package( SOIC) Package ALD4302A DB ALD4302A SB ALD4302A PB ALD4302 DB ALD4302 SB ALD4302 PB PIN CONFIGURATION DB, PB, SB PACKAGE +IN 1 -IN 2 +IN 2 GND -IN 4 +IN 3 -IN 3 -IN 1 +IN 4 1 14 (3) INVERTING INPUT - IN 1 (4) NONINVERTING INPUT +IN 1 (5) NONINVERTING INPUT + IN 2 (7) INVERTING INPUT - IN 2 (6) NONINVERTING INPUT + IN 3 (9) INVERTING INPUT - IN 3 (8) INVERTING INPUT - IN 4 (10) (12) NONINVERTING INPUT + IN 4 (11) (2) OUT 1 (1) OUT 2 (14) OUT 3 (13) OUT 4 * Contact factory for industrial temperature range

ORDERING INFORMATION

© 2005.1 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 T el: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com

ALD4302/ALD4302 Advanced Linear Devices 2 Notes: 1 Consists of junction leakage currents

2 Sample tested parameters

Voltage V S ±1.5 ±6 ±1.5 ±6 V Dual Supply Supply V + 3 12 3 12 V Single Supply Supply I S 600 1000 600 1000 µAR LOAD = ∞ Current Voltage A VD 30 100 30 100 V/mV R LOAD ≥15K Ω Gain Input Offset VOS 51 0 m V R LOAD =1.5KΩ Voltage Input Offset IOS 10 200 10 200 pA Current 1 800 800 Input Bias I B 10 200 10 200 pA 0 °C ≤ TA ≤ 70°C Current 1 1000 1000 Common Mode Input V ICR -0.3 V +-1.5 -0.3 V + -1.5 V0 °C ≤ TA ≤ 70°C Voltage Range Low Level ISINK =12mA Output V OL 0.18 0.4 0.18 0.4 V V INPUT =1V Voltage Differential Low Level Output I OL 24 60 24 60 mA V OL =1.0V Current High Level Output V OH 3.5 4.5 3.5 4.5 V I OH = -2mA Voltage Response RL = 5.1KΩ Time 2 tRP 400 400 ns C L = 15pF 100mV Input Step/5mV Overdrive R L = 5.1KΩ 120 120 ns C L = 15pF TTL- Level Input Step OPERATING ELECTRICAL CHARACTERISTICS TA = 25°C V+= +5V unless otherwise specified 4302A 4302 Test Parameter Symbol Min Typ Max Min Typ Max Unit Conditions ABSOLUTE MAXIMUM RATINGS Supply voltage, V+ 13.2V Differential input voltage range -0.3V to V + +0.3V Power dissipation 600 mW Operating temperature range PB, SB package 0 °C to +70°C DB package -55 °C to +125°C Storage temperature range -65°C to +150°C Lead temperature, 10 seconds +260°C

ALD4302/ALD4302 Advanced Linear Devices 3 TYPICAL PERFORMANCE CHARACTERISTICS SA TURA TION VOL TAGE vs. SINK CURRENT OUTPUT SINK CURRENT (mA) 0 1 53 04 56 07 5 1.5 1.2 0.9 0.6 0.3 0.0 OUTPUT SATURATION VOLTAGE (V) VS = –2.5V -55°C 25°C -25°C 85°C 125°C TIME (µs) RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES +2.5 100 0.0 -2.5 INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V) TTL 5mV 10mV 20mV 50mV TA = 25°C VS = –2.5V VIN V+ VOUT+ TRANSFER FUNCTION DIFFERENTIAL INPUT VOLTAGE (mV) +6.0 -6.0 0.0 OUTPUT VOLTAGE (V) +2.50.0-2.5 TA = 25°C VS = –6V R L = 5.1K COMMON - MODE VOL TAGE REFERRED TO SUPPL Y VOL TAGE TEMPERATURE ( °C) 0.5 -0.5 -1.0 0.5 -0.5 COMMON - MODE LIMITS (V) -55 -25 0 25 50 125 10075 VS = – 2.5V SA TURA TION VOL TAGE vs. TEMPERATURE TEMPERATURE ( °C) -55 -25 0 25 50 125 10075 1.4 1.2 1.0 0.8 0.6 0.4 0.2 SATURATION VOLTAGE (V) VS = – 2.5V ISINK = 50mA TIME (µs) RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES +2.5 100 0.0 -2.5 INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V) TTL 50mV 20mV 5mV 10mV TA = 25°C VS = –2.5V VIN V+ VOUT+

ALD4302/ALD4302 Advanced Linear Devices 4 TYPICAL PERFORMANCE CHARACTERISTICS 600 500 400 300 700 02 5 50 75-25-55 TEMPERATURE ( °C) SUPPLY CURRENT ( µA) 100 800 900 1000 125 VS = –2.5V No Load All comparators SUPPLY CURRENT vs. TEMPERATURE 6 8 10 1242 SUPPLY VOLTAGE (V) OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE OUTPUT LOW VOLTAGE (V) TA = 25°C IOL = 12mA 0.0 0.2 0.4 0.5 0.6 0.1 0.3 800 600 400 200 1000 SUPPLY VOLTAGE (V) SUPPLY CURRENT ( µA) TA = 25°C R L = ∞ TOTAL SUPPLY CURRENT vs. TOTAL SUPPLY VOLTAGE 6 8 10 1242 SUPPLY VOLTAGE (V) OUTPUT HIGH VOLTAGE vs. SUPPLY VOLTAGE OUTPUT HIGH VOLTAGE FROM V + (V) TA = 25°C IOH = -2mA V+ -0.6 V+ -0.1 V+ -0.2 V+ -0.3 V+ -0.4 V+ -0.5 NORMALIZED INPUT OFFSET VOLTAGE vs. TEMPERATURE TEMPERATURE ( °C) -55 -25 0 25 50 125 10075 NORMALIZED INPUT OFFSET VOLTAGE (mV) VCM = 0V VS = –2.5V 6 8 10 1242 SUPPLY VOLTAGE (V) INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE REPRESENTATIVE SAMPLES INPUT OFFSET VOLTAGE (mV) TA = 25°C

ALD4302/ALD4302 Advanced Linear Devices 5 TYPICAL APPLICATIONS DOUBLE DUAL LIMIT WINDOW COMPARATORZERO CROSSING DETECTOR +5V -5V 1/4 ALD4302 VOUT VIN MULTIPLE RELAY DRIVE +5V +5V 1/4 ALD4302 VREF VIN VL1 and VH1 first limit window send warning. VL2 and VH2 second limit window execute system cutoff. +12V+12V +12V +12V 50K 47K 50K VH 2 VH 1 VL1 VL2 ALD4302 VIN VOLTAGE LEVEL TRANSLATOR 1/4 ALD4302 = 1.4V for TTL input = V+ for CMOS input VOUT VREF VIN VREF VREF Output VOUT swings from rail- to- rail V+ = +10V

ALD4302/ALD4302 Advanced Linear Devices 6 TIME DELAY GENERATOR 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. TYPICAL APPLICATIONS PUSH-PULL COMPLEMENTARY POWER MOSFET DRIVER R F4 1/4 ALD4302 1/4 ALD4302 R F3 R F2 R F1 1/4 ALD4302 1/4 ALD4302 R T C T +VIN VREF +12V +12V +12V P- Channel VP 02 Power MOSFET 2A Source 2A Sink N - Channel VN 01 Power MOSFET +12V 10K 40K 10K VIN 1/4 ALD4302 1/4 ALD4302 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.