Overview
The LM219D, produced by STMicroelectronics, is a precision high-speed dual comparator designed to operate over a wide range of supply voltages. It is capable of functioning with supply voltages from a single 5 V logic supply to ±15 V, making it highly versatile for various applications. The LM219D features low input currents and high gains, with an open collector output stage that is compatible with transistor-transistor logic (TTL) and can drive lamps and relays at currents up to 25 mA.
These comparators are optimized for high-speed operations, offering a typical response time of 80 ns at ±15 V. They are suitable for applications requiring operation from digital logic supplies and are fully specified for power supplies up to ±15 V.
Key Specifications
| Parameter | Conditions | Units | Min | Typ | Max |
|---|---|---|---|---|---|
| Supply Voltage | V | 5 | ±15 | ||
| Response Time | VCC = ±15 V | ns | 80 | ||
| Input Offset Voltage | TA = 25°C, RS ≤ 5 kΩ | mV | 0.7 | 4.0 | 7.0 |
| Input Offset Current | TA = 25°C | nA | 30 | 75 | 100 |
| Input Bias Current | TA = 25°C | nA | 150 | 500 | 1000 |
| Positive Supply Current | TA = 25°C, V+ = 5 V, V− = 0 V | mA | 4.3 | ||
| Positive Supply Current | TA = 25°C, VS = ±15 V | mA | 8 | 11.5 | |
| Negative Supply Current | TA = 25°C, VS = ±15 V | mA | 3 | 4.5 | |
| Operating Temperature Range | °C | -25 | 85 | ||
| Maximum Junction Temperature | °C | 110 |
Key Features
- Two independent comparators
- Wide supply voltage range: +5 V to ±15 V
- Typical response time of 80 ns at ±15 V
- Low input current: maximum of 1 μA over the operating temperature range
- Inputs and outputs can be isolated from system ground
- High common-mode slew rate
- Open collector output stage compatible with TTL and capable of driving lamps and relays up to 25 mA
Applications
The LM219D is suitable for a variety of applications, including:
- Industrial control systems
- Digital logic circuits
- Relay and lamp drivers
- Window detectors and other threshold detection circuits
- High-speed comparator applications requiring low input currents and high gains
Q & A
- What is the supply voltage range of the LM219D?
The LM219D can operate with supply voltages ranging from +5 V to ±15 V.
- What is the typical response time of the LM219D at ±15 V?
The typical response time is 80 ns at ±15 V.
- What is the maximum input current of the LM219D?
The maximum input current is 1 μA over the operating temperature range.
- Can the inputs and outputs of the LM219D be isolated from system ground?
- What is the maximum current that the LM219D can drive for lamps and relays?
The LM219D can drive currents up to 25 mA for lamps and relays.
- What is the operating temperature range of the LM219D?
The operating temperature range is -25°C to 85°C.
- What is the maximum junction temperature of the LM219D?
The maximum junction temperature is 110°C.
- Is the LM219D compatible with TTL logic?
- What are some common applications of the LM219D?
- What package types are available for the LM219D?
