The LM393 series are dual independent precision voltage comparators capable of single or split supply operation. These devices are designed to permit a common mode range–to–ground level with single supply operation. Input offset voltage specifications as low as 2.0 mV make this device an excellent selection for many applications in consumer automotive, and industrial electronics.
The LM393 family are dual independent precision voltage comparators designed for single‑ or split‑supply operation. They feature a low input offset voltage (2 mV max for LM393A, 5 mV max for LM293/LM393), very low input bias (25 nA) and offset currents (5 nA), and output compatibility with DTL, ECL, TTL, MOS and CMOS logic levels.
The datasheet lists maximum ratings such as a single‑supply range of 2 V to 36 V, split‑supply range of +1 V to +18 V, typical supply current of 0.4 mA, and a maximum output sink current of 20 mA. Operating temperature ranges cover –40 °C to +125 °C depending on the part, and detailed electrical characteristics, pin connections, package dimensions, and application circuits are provided.
| Supply Voltage Range (single) | 2.0 V to 36 V |
|---|---|
| Supply Voltage Range (split) | +1.0 V to +18 V |
| Typical Supply Current | 0.4 mA |
| Input Bias Current | 25 nA |
| Input Offset Current | 5.0 nA |
| Input Offset Voltage (max) | 2.0 mV (LM393A) / 5.0 mV (LM293/LM393) |
| Power Dissipation (typical at 25 °C) | 570 mW |
| Maximum Output Sink Current | 20 mA |
| Operating Temperature Range (LM393) | -40 °C to +70 °C |
| Operating Temperature Range (LM2903V) | -40 °C to +125 °C |
The LM393 series can operate from 2 V up to 36 V on a single supply.
Typical supply current is about 0.4 mA, independent of the supply voltage.
The device can sink up to 20 mA of output current.
The LM393A has a maximum input offset voltage of 2.0 mV.