LM392 Dual low power comparator | TI.com

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Dual low power comparator

Dual low power comparator - LM392


The LM392 consists of two independent building-block circuits. One is a high-gain internally-frequency-compensated operational amplifier, and the other is a precision voltage comparator. Both the operational amplifier and the voltage comparator are designed to operate from a single power supply over a wide range of voltages. Both circuits have input stages that force the common-mode input down to ground when operating from a single power supply. Operation from split power supplies also is possible, and the low power-supply current is independent of the magnitude of the supply voltage.

Applications include transducer amplifiers with pulse shapers, DC gain blocks with level detectors, and VCOs, as well as all conventional operational amplifier or voltage-comparator circuits. The LM392 can be operated directly from the standard 5-V power-supply voltage used in digital systems, and the output of the comparator interfaces directly with either TTL or CMOS logic. In addition, the low-power drain makes the LM392 extremely useful in the design of portable equipment.


  • Wide Power-Supply Voltage Range
    • Single Supply: 3 V to 32 V
    • Dual Supply: ±1.5 V to ±16 V
  • Low Supply-Current Drain Essentially Independent of Supply Voltage: 600 µA
  • Low Input Biasing Current: 50 nA
  • Low Input Offset Voltage: 2 mV
  • Low Input Offset Current: 5 nA
  • Input Common-Mode Voltage Range Includes Ground
  • Differential Input Voltage Range Equals Power-Supply Voltage
  • Additional Operational Amplifier Features
    • Internally Frequency Compensated for Unity Gain
    • Large DC Voltage Gain: 100 dB
    • Wide Bandwidth (Unity Gain): 1 MHz
    • Large Output Voltage Swing: 0 V to V+ - 1.5 V
  • Additional Comparator Features
    • Low Output Saturation Voltage: 250 mV at 4 mA
    • Output Voltage Compatible With All Types of Logic Systems
    • Eliminates Need for Dual Power Supplies
    • An Internally Compensated Operational Amplifier and a Precision Comparator in the Same Package
    • Allows Sensing at or Near Ground


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Part number Order Number of channels (#) Package Group Vos (offset voltage @ 25 C) (Max) (mV) Iq per channel (Typ) (mA) Rail-to-rail Rating Operating temperature range (C) Package size: mm2:W x L (PKG) Features Approx. price (US$)
LM392 Order now 2     PDIP | 8
SOIC | 8
VSSOP | 8    
5     0.5     In to V-     Catalog     0 to 70     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
    0.39 | 1ku