Overview
The LM393N is a dual-voltage comparator integrated circuit produced by Fairchild Semiconductor. It consists of two independent voltage comparators designed to operate from a single power supply over a wide voltage range, as well as from split power supplies. This versatility makes the LM393N suitable for a variety of electrical configurations. The device is notable for its ability to compare voltages near ground potential, even when operated from a single supply voltage, and its compatibility with all forms of logic (TTL, DTL, ECL, MOS, CMOS).
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Supply Voltage Range | VCC | +2 V to +36 V (single-supply) or ±1 V to ±18 V (dual supply) | V |
| Supply Current | 0.45 mA (typical at +5 V) | mA | |
| Input Bias Current | IBIAS | 20 nA (typical) | nA |
| Input Offset Current | IIO | ±3 nA (typical) | nA |
| Input Offset Voltage | VIO | ±1 mV (typical) | mV |
| Input Common-Mode Voltage Range | VI(R) | Includes ground | |
| Output Saturation Voltage | 80 mV (typical, Isink = 4 mA) | mV | |
| Differential Input Voltage Range | VI(DIFF) | Equal to the supply voltage | V |
| Operating Temperature | TOPR | 0°C to +70°C | °C |
| Response Time | 1300 ns | ns | |
| Package | 8-DIP |
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 (1 mW/comparator at +5 V).
- 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.
- Compatible with TTL, DTL, ECL, MOS, CMOS outputs.
Applications
The LM393N is versatile and can be used in a variety of applications. It is particularly useful in battery-powered devices due to its low power consumption and ability to operate over a wide voltage range. This makes it ideal for monitoring battery status and extending battery life in portable electronics.
In industrial systems, the LM393N is used for signal processing and decision-making. For example, in temperature control systems, it can compare temperature readings to set benchmarks and trigger control processes to maintain desired environmental conditions.
Other applications include automated systems, embedded systems, and any scenario where precise voltage comparison is necessary under varying power conditions.
Q & A
- What is the supply voltage range of the LM393N?
The LM393N 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 LM393N?
The typical supply current is 0.45 mA, independent of the supply voltage.
- What is the input bias current of the LM393N?
The input bias current is typically 20 nA.
- What is the input offset voltage of the LM393N?
The input offset voltage is typically ±1 mV.
- Can the LM393N operate with ground as the input common-mode voltage?
- What is the output saturation voltage of the LM393N?
- Is the LM393N compatible with different logic types?
- What is the response time of the LM393N?
- What are some common applications of the LM393N?
- Can the LM393N be replaced by other comparators?
