Overview
The LM311DRE4, produced by Texas Instruments, is a high-speed differential comparator that belongs to the LMx11 family, which includes the LM111, LM211, and LM311. These devices are renowned for their low input currents, which are nearly a thousand times lower than those of legacy standard devices. The LM311DRE4 can operate over a wide range of supply voltages, from standard ±15V op-amp supplies down to a single 5-V supply used in IC logic systems. This versatility makes it suitable for various applications, including level shifting to higher or lower voltages. The device is also capable of driving loads such as lamps or relays, switching voltages up to 50 V at currents as high as 50 mA.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Input Bias Current | 300 | nA |
| Maximum Input Offset Current | 70 | nA |
| Operating Temperature Range | 0 to 70 | °C |
| Response Time | 165 | ns |
| Output Current | Up to 50 | mA |
| Output Voltage Range | Up to 50 | V |
| Package Type | SOIC (D) | |
| Number of Pins | 8 |
Key Features
- Fast Response Time: 165 ns
- Strobe Capability: Allows the output to be in the off state when the strobe is low, regardless of the differential input.
- Low Input Bias Current: 300 nA maximum.
- Low Input Offset Current: 70 nA maximum.
- Wide Supply Voltage Range: Can operate from ±15V op-amp supplies to a single 5-V supply.
- High Voltage Capability: Can drive loads and switch voltages up to 50 V at 50 mA.
- Output Compatibility: Compatible with RTL, DTL, TTL, and MOS circuits.
- Offset Balancing: Available for precise voltage adjustments.
- Wire-OR Capability: Outputs can be wire-OR connected.
- Isolation from System Ground: Both inputs and outputs can be isolated from system ground.
Applications
- Level Shifting: Ideal for shifting voltage levels to higher or lower voltages.
- Zero-Crossing Detectors: Can be used to detect zero-crossing points in AC signals.
- Relay and Lamp Drivers: Capable of driving relays and lamps directly.
- Automotive Applications: Qualified for high-reliability automotive applications.
- Military and Industrial Applications: Compliant with MIL-PRF-38535 standards.
Q & A
- What is the maximum input bias current of the LM311DRE4?
The maximum input bias current is 300 nA.
- What is the operating temperature range of the LM311DRE4?
The operating temperature range is from 0°C to 70°C.
- Can the LM311DRE4 operate from a single 5-V supply?
- What is the response time of the LM311DRE4?
The response time is 165 ns.
- Can the outputs of the LM311DRE4 be wire-OR connected?
- What is the maximum output current of the LM311DRE4?
The maximum output current is up to 50 mA.
- Is the LM311DRE4 compatible with TTL and MOS circuits?
- Can the inputs and outputs of the LM311DRE4 be isolated from system ground?
- What is the strobe capability of the LM311DRE4?
The strobe capability allows the output to be in the off state when the strobe is low, regardless of the differential input.
- Is the LM311DRE4 qualified for automotive applications?
