Overview
The LM311PSRE4 from Texas Instruments is a high-speed, differential input voltage comparator. It is part of the LMx11 family, which includes the LM111, LM211, and LM311 models. These devices are designed for rapid switching and are generally operated in open-loop mode, making them ideal for applications requiring fast response times and high differential input voltage tolerance.
Key Specifications
| Attribute | Value |
|---|---|
| Comparator Type | General Purpose |
| Mounting Type | Through Hole |
| Package Type | PDIP, SO (for different variants) |
| Power Supply Type | Dual, Single |
| Output Type | Open Collector/Emitter |
| Number of Channels per Chip | 1 |
| Typical Response Time | 0.165µs (200 ns for some conditions) |
| Pin Count | 8 |
| Typical Single Supply Voltage | 5 → 28 V |
| Typical Dual Supply Voltage | ±12 V, ±3 V, ±5 V, ±9 V |
| Dimensions | 9.81 x 6.35 x 4.57mm (for PDIP package) |
| Maximum Operating Temperature | +70 °C |
| Minimum Operating Temperature | 0 °C |
| Differential Input Voltage | ±30 V |
| Input Bias Current | 250 nA (Max) |
| Input Offset Current | 50 nA (Max) |
Key Features
- Low input bias current: 250 nA (Max)
- Low input offset current: 50 nA (Max)
- Differential input voltage capability: ±30 V
- Offset voltage null capability
- Strobe capability for external control
- Outputs can drive loads referenced to ground, VCC+, or VCC-
- Compatible with most TTL and MOS circuits
- Can operate from single 5-V supply to ±15 V dual supply
Applications
- Desktop PCs
- Body Control Modules
- White Goods
- Building Automation
- Oscillators
- Peak Detectors
Q & A
- What is the typical response time of the LM311PSRE4? The typical response time is 0.165µs, but it can be as low as 200 ns under certain conditions.
- What are the operating temperature ranges for the LM311PSRE4? The operating temperature range is from 0°C to +70°C.
- Can the LM311PSRE4 operate from a single supply voltage? Yes, it can operate from a single supply voltage ranging from 5 V to 28 V.
- What is the maximum differential input voltage for the LM311PSRE4? The maximum differential input voltage is ±30 V.
- Does the LM311PSRE4 have strobe capability? Yes, it has strobe capability for external control.
- What is the maximum output current of the LM311PSRE4? The device can drive loads up to 50 mA.
- Is the LM311PSRE4 compatible with TTL and MOS circuits? Yes, the output levels are compatible with most TTL and MOS circuits.
- What are the package types available for the LM311PSRE4? The LM311PSRE4 is available in PDIP and SO packages.
- Can the inputs and outputs of the LM311PSRE4 be isolated from system ground? Yes, all inputs and outputs can be isolated from system ground.
- What is the input bias current of the LM311PSRE4? The maximum input bias current is 250 nA.
