Overview
The LM311DT, produced by STMicroelectronics, is a high-speed voltage comparator designed to operate over a wide range of supply voltages. This device is part of the LM111, LM211, and LM311 series, known for their low input currents and versatility in various electronic systems. The LM311DT can operate from a single 5V supply or from standard ±15V operational amplifier supplies, making it compatible with TTL, DTL, MOS, and other logic circuits. It features a strobe capability and can drive loads up to 50V at currents as high as 50mA, making it suitable for applications requiring high output drive capability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | +5V to ±15V | V |
| Differential Input Voltage Range | ±30V | V |
| Maximum Input Bias Current | 150nA | A |
| Maximum Input Offset Current | 20nA | A |
| Output Current | 50mA | A |
| Operating Temperature Range | 0°C to +70°C | °C |
| Power Consumption | 135mW at ±15V | mW |
| Junction Temperature | +150°C | °C |
| Storage Temperature Range | -65°C to +150°C | °C |
Key Features
- Low input bias current: 150nA maximum.
- Low input offset current: 20nA maximum.
- Wide differential input voltage range: ±30V.
- High output drive capability: up to 50V at 50mA.
- Strobe capability for external control of the output state.
- Offset balancing pins for external offset adjustment.
- Output compatible with TTL, DTL, MOS, and other logic circuits.
- Isolated emitter from VCC–, allowing flexible output configurations.
Applications
- Desktop PCs and other computer systems.
- Body Control Modules in automotive systems.
- White Goods and home appliances.
- Building Automation and control systems.
- Oscillators and peak detectors in various electronic circuits.
- Relay and lamp drivers in industrial and consumer electronics.
Q & A
- What is the supply voltage range for the LM311DT?
The LM311DT can operate from a single 5V supply or from standard ±15V operational amplifier supplies. - What is the maximum differential input voltage range for the LM311DT?
The maximum differential input voltage range is ±30V. - What is the maximum output current of the LM311DT?
The maximum output current is 50mA. - Can the LM311DT operate in high-temperature environments?
Yes, it can operate in temperatures ranging from 0°C to +70°C. - What is the power consumption of the LM311DT at ±15V supply?
The power consumption is 135mW at ±15V supply. - Does the LM311DT have strobe capability?
Yes, it has a strobe capability for external control of the output state. - Is the output of the LM311DT compatible with TTL and MOS circuits?
Yes, the output is compatible with TTL, DTL, MOS, and other logic circuits. - Can the LM311DT drive loads referenced to ground, VCC+, or VCC-?
Yes, the output can drive loads referenced to ground, VCC+, or VCC-. - What is the maximum junction temperature for the LM311DT?
The maximum junction temperature is +150°C. - What is the storage temperature range for the LM311DT?
The storage temperature range is -65°C to +150°C.
