LM393ADT
Overview
The LM393ADT is a versatile dual independent precision voltage comparator designed to operate from a single power supply over a wide range of voltages from 2V to 36V. It features an open-collector output, allowing for easy level shifting and logical integration with various digital logic families including TTL, DTL, ECL, and CMOS. This specific variant from STMicroelectronics is housed in a compact 8-SOIC package and includes integrated ESD protection up to 2kV.
Why Choose This Part
The LM393ADT offers a broad supply range up to 36V and a very low input bias current of 0.1uA at 5V, minimizing loading effects on high-impedance sensors. Its dual-channel configuration in a small SOIC footprint provides high functional density, while the output stage's ability to swing to the rail simplifies interfacing with low-voltage microcontrollers.
Applications
Key Specifications
Getting Started
To use the LM393ADT, ensure a pull-up resistor is connected to the output pin, as the open-collector stage cannot drive a high signal on its own. For rapid prototyping, this 8-SOIC part can be used with a standard SOIC-to-DIP adapter on a breadboard. Bypass the supply pins with a 0.1uF ceramic capacitor placed close to the IC to maintain stability during high-speed switching.
LM393 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Current - Output (Typ) | Current - Input Bias (Max) | Voltage - Input Offset (Max) | Stock |
|---|---|---|---|---|
| LM393ADT (this part) | 18mA | 0.1uA | 2mV | 185,022 |
| LM393DR (Texas Instruments) | 20mA | 0.25uA | 5mV | 159,557 |
Also Consider
STMicroelectronics
- Select this for applications requiring an extended automotive temperature range of -40C to +125C.
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