Overview
The LM219DT, produced by STMicroelectronics, is a high-speed dual comparator integrated circuit. This component is designed to operate over a wide range of supply voltages, from a single 5 V logic supply to ±15 V. It features two independent comparators, making it versatile for various applications requiring precision and speed.
The LM219DT is part of the LM119, LM219, and LM319 family, which are known for their low input currents, high gains, and compatibility with transistor-transistor logic (TTL) as well as the ability to drive lamps and relays at currents up to 25 mA.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | +5 V to ±15 V | V |
| Response Time | Typically 80 ns at ±15 V | ns |
| Input Offset Voltage | 0.7 to 7 mV (Rs ≤ 5 kΩ) | mV |
| Input Offset Current | 30 to 100 nA | nA |
| Input Bias Current | 150 to 1000 nA | nA |
| Large Signal Voltage Gain | 10 to 40 V/mV | V/mV |
| Output Current (Sink) | Up to 25 mA | mA |
| Operating Temperature Range | -45 °C to +105 °C | °C |
| Maximum Junction Temperature | 150 °C | °C |
Key Features
- Two independent high-speed comparators.
- Wide supply voltage range: +5 V to ±15 V.
- Low input currents and high gains.
- Open collector output stage compatible with TTL and capable of driving lamps and relays up to 25 mA.
- High common-mode slew rate and fast response times.
- Inputs and outputs can be isolated from system ground.
- Available in DIP14 and SO-14 packages.
Applications
- Digital logic circuits requiring high-speed comparisons.
- Relay and lamp drivers.
- Window detectors and threshold detectors.
- General-purpose comparator applications in industrial, automotive, and consumer electronics.
- Circuits requiring isolation between inputs and outputs.
Q & A
- What is the supply voltage range for the LM219DT?
The LM219DT operates over a supply voltage range of +5 V to ±15 V.
- What is the typical response time of the LM219DT?
The typical response time is 80 ns at ±15 V supply voltage.
- What is the maximum output current of the LM219DT?
The LM219DT can drive currents up to 25 mA.
- What are the package options for the LM219DT?
The LM219DT is available in DIP14 and SO-14 packages.
- What is the operating temperature range for the LM219DT?
The operating temperature range is -45 °C to +105 °C.
- Can the LM219DT be used in TTL logic circuits?
- What is the maximum junction temperature for the LM219DT?
The maximum junction temperature is 150 °C.
- What are some common applications of the LM219DT?
- Can the inputs and outputs of the LM219DT be isolated from system ground?
- What is the input offset voltage range for the LM219DT?
The input offset voltage range is typically 0.7 to 7 mV (Rs ≤ 5 kΩ).
