Overview
The LM293N, 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 by a single supply voltage.
The LM293N is part of the LMx93 series, which includes other models like the LM193 and LM393. These comparators are optimized for low power consumption and high precision, making them suitable for various applications, including battery-powered devices and industrial systems.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value |
|---|---|---|---|
| Supply Voltage Range | 2 V to 36 V or ±1 V to ±18 V | 2 V | 36 V |
| Supply Current | 0.45 mA | 0.4 mA | 1.0 mA |
| Input Bias Current | 20 nA | 25 nA | 100 nA |
| Input Offset Current | ±3 nA | ±3 nA | ±5 nA |
| Input Offset Voltage | ±1 mV | ±1 mV | ±5 mV |
| Input Common-Mode Voltage Range | 0 to V+ - 1.5 V | 0 V | V+ - 1.5 V |
| Output Saturation Voltage | 80 mV (Isink = 4 mA) | 80 mV | 250 mV |
| Differential Input Voltage Range | Equal to the supply voltage | 0 V | 36 V |
| Output Compatibility | TTL, DTL, ECL, MOS, CMOS | - | - |
| Operating Temperature Range | -25°C to +85°C | -25°C | +85°C |
| Package Options | DFN8 2x2, MiniSO8, TSSOP8, SO8 | - | - |
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
- Output voltage compatible with TTL, DTL, ECL, MOS, and CMOS logic systems
- Available in DFN8 2x2, MiniSO8, TSSOP8, and SO8 packages
Applications
- Battery-powered applications
- Industrial applications
- Limit comparators
- Simple analog to digital converters
- Pulse, squarewave, and time delay generators
- Wide range VCO (Voltage-Controlled Oscillators)
- MOS clock timers
- Multivibrators
- High voltage digital logic gates
Q & A
- What is the supply voltage range of the LM293N?
The LM293N can operate from a single supply voltage range of 2 V to 36 V or from dual supplies of ±1 V to ±18 V.
- What is the typical supply current of the LM293N?
The typical supply current is 0.45 mA, which is independent of the supply voltage.
- What is the input bias current of the LM293N?
The input bias current is typically 20 nA.
- What is the input offset voltage of the LM293N?
The input offset voltage is typically ±1 mV.
- Can the input common-mode voltage range include ground?
- What is the output saturation voltage of the LM293N?
The output saturation voltage is typically 80 mV at an output sink current of 4 mA.
- What logic systems are the outputs of the LM293N compatible with?
The outputs are compatible with TTL, DTL, ECL, MOS, and CMOS logic systems.
- In what packages is the LM293N available?
The LM293N is available in DFN8 2x2, MiniSO8, TSSOP8, and SO8 packages.
- What is the operating temperature range of the LM293N?
The operating temperature range is -25°C to +85°C.
- Are there any special features for ESD protection in the LM293N series?
The LM393W, a variant in the same series, offers additional ESD robustness of 2 kV HBM on all pins.
