Overview
The LM393DT, produced by STMicroelectronics, is a low-power dual voltage comparator. It consists of two independent low-voltage comparators designed to operate from a single supply over a wide range of voltages, as well as from split power supplies. This device is notable for its ability to operate with input common-mode voltage ranges that include ground, even when powered from a single supply voltage. The LM393DT is part of the LM393 series, which also includes variants with enhanced ESD protection, such as the LM393W.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2 V to 36 V or ±1 V to ±18 V | V |
| Supply Current | 0.45 mA | mA |
| Input Bias Current | 20 nA (typ.) | nA |
| Input Offset Current | ±3 nA (typ.) | nA |
| Input Offset Voltage | ±1 mV (typ.) | mV |
| Input Common-Mode Voltage Range | Includes ground | |
| Output Saturation Voltage | 80 mV (typ., Isink = 4 mA) | mV |
| Differential Input Voltage Range | Equal to the supply voltage | V |
| Output Compatibility | TTL, DTL, ECL, MOS, CMOS | |
| Package Types | DFN8 2x2, MiniSO8, TSSOP8, SO8 | |
| Operating Temperature Range | 0 °C to 70 °C | °C |
Key Features
- Wide single-supply voltage range or dual supplies: 2 V to 36 V or ±1 V to ±18 V
- Very low supply current (0.45 mA) independent of supply voltage
- Low input bias current: 20 nA typical
- Low input offset current: ±3 nA typical
- Low input offset voltage: ±1 mV typical
- Input common-mode voltage range includes ground
- Low output saturation voltage: 80 mV typical (Isink = 4 mA)
- Differential input voltage range equal to the supply voltage
- TTL, DTL, ECL, MOS, CMOS compatible outputs
- Available in DFN8 2x2, MiniSO8, TSSOP8, and SO8 packages
- LM393W variant with internal ESD protection: 2 kV HBM
Applications
The LM393DT is suitable for various applications, including:
- Sensing and Instrumentation: Due to its low power consumption and wide operating voltage range, it is ideal for sensor circuits and instrumentation systems.
- Industrial Control Systems: The device's robustness and compatibility with various logic families make it a good choice for industrial control systems.
- Automotive Systems: Its ability to operate over a wide temperature range and with low power consumption makes it suitable for automotive applications.
Q & A
- What is the supply voltage range of the LM393DT?
The LM393DT can operate from a single supply voltage of 2 V to 36 V or from dual supplies of ±1 V to ±18 V. - What is the typical supply current of the LM393DT?
The typical supply current is 0.45 mA, independent of the supply voltage. - What is the input bias current of the LM393DT?
The input bias current is typically 20 nA. - Does the LM393DT have ESD protection?
The LM393W variant of this series has internal ESD protection of 2 kV HBM, but the LM393DT does not have this feature. - What are the available package types for the LM393DT?
The LM393DT is available in DFN8 2x2, MiniSO8, TSSOP8, and SO8 packages. - What is the operating temperature range of the LM393DT?
The operating temperature range is 0 °C to 70 °C. - Is the LM393DT compatible with different logic families?
Yes, it is compatible with TTL, DTL, ECL, MOS, and CMOS logic families. - What is the typical output saturation voltage of the LM393DT?
The typical output saturation voltage is 80 mV when Isink = 4 mA. - Can the LM393DT operate with input common-mode voltage including ground?
Yes, the input common-mode voltage range includes ground. - What is the differential input voltage range of the LM393DT?
The differential input voltage range is equal to the supply voltage.
