Overview
The LM293ST, produced by STMicroelectronics, is a low-power dual voltage comparator designed to operate from a single supply over a wide range of voltages or from dual supplies. This device consists of two independent comparators, each capable of operating from 2 V to 36 V or from ±1 V to ±18 V. The LM293ST is notable for its ability to include ground within the input common-mode voltage range, even when operated from a single power supply voltage.
This component is part of the LM193, LM293, and LM393 family, known for their low power consumption and versatile operating conditions. The LM293ST is suitable for various applications requiring precise voltage comparison and low power consumption.
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 (typical at 5 V) | mA |
| Input Bias Current | 20 nA (typical) | nA |
| Input Offset Current | ±3 nA (typical) | nA |
| Input Offset Voltage | ±1 mV (typical) | mV |
| Output Saturation Voltage | 80 mV (typical at Isink = 4 mA) | mV |
| Response Time | 300 ns (typical) | ns |
| Output Compatibility | TTL, DTL, ECL, MOS, CMOS | - |
| Package Type | MiniSO8 | - |
| Pin Count | 8 | - |
| Operating Temperature Range | -25°C to 85°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 at Isink = 4 mA
- Differential input voltage range equal to the supply voltage
- Output compatible with TTL, DTL, ECL, MOS, and CMOS
- Available in various packages including MiniSO8, SO8, TSSOP8, and QFN8
- Fast response time: 300 ns typical
Applications
The LM293ST is versatile and can be used in a variety of applications, including:
- Voltage monitoring and detection circuits
- Threshold detectors
- Window comparators
- Automotive and industrial control systems
- Medical devices requiring low power consumption
- Consumer electronics where precise voltage comparison is necessary
Q & A
- What is the supply voltage range of the LM293ST?
The LM293ST can operate from a single supply voltage ranging from 2 V to 36 V or from dual supplies ranging from ±1 V to ±18 V.
- What is the typical supply current of the LM293ST?
The typical supply current is 0.45 mA, independent of the supply voltage.
- What is the input bias current of the LM293ST?
The input bias current is typically 20 nA.
- What is the input offset voltage of the LM293ST?
The input offset voltage is typically ±1 mV.
- Is the output of the LM293ST compatible with other logic families?
Yes, the output is compatible with TTL, DTL, ECL, MOS, and CMOS logic families.
- What is the response time of the LM293ST?
The typical response time is 300 ns.
- In what packages is the LM293ST available?
The LM293ST is available in MiniSO8, SO8, TSSOP8, and QFN8 packages.
- What is the operating temperature range of the LM293ST?
The operating temperature range is -25°C to 85°C.
- Does the LM293ST include ground within its input common-mode voltage range?
Yes, the input common-mode voltage range includes ground even when operated from a single power supply voltage.
- What are some common applications of the LM293ST?
Common applications include voltage monitoring, threshold detection, window comparators, automotive and industrial control systems, and medical devices.
