Overview
The LM311P3, produced by Texas Instruments, is a single high-speed voltage comparator. This device is part of the LM311 series, which includes the LM111 and LM211. The LM311P3 is designed to operate from a wide range of power-supply voltages, including single 5-V supplies for logic systems and ±15-V supplies for operational amplifiers. It is capable of driving lamps or relays and switching voltages up to 50 V at 50 mA. All inputs and outputs can be isolated from system ground, and the outputs can drive loads referenced to ground, VCC+ or VCC−. The device features offset balancing and strobe capabilities, and the outputs can be wire-OR connected.
Key Specifications
| Parameter | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage | VIO | - | - | 7.5 | mV |
| Input Offset Current | IIO | - | - | 70 | nA |
| Input Bias Current | IBIAS | - | - | 300 | nA |
| Response Time | TRES | - | - | 200 | ns |
| Saturation Voltage | VSAT | - | - | 1.5 | V |
| Positive Supply Current | ICC | - | - | 7.5 | mA |
| Negative Supply Current | IEE | - | - | 5.0 | mA |
| Operating Temperature Range | TOPR | 0 | - | 70 | °C |
| Storage Temperature Range | TSTG | -65 | - | 150 | °C |
Key Features
- Fast Response Time: 165 ns to 200 ns.
- Strobe Capability: Allows the output to be turned off regardless of the differential input when the strobe is low.
- Low Input Bias Current: Maximum of 300 nA.
- Low Input Offset Current: Maximum of 70 nA.
- Can Operate From Single 5-V Supply: Also compatible with ±15-V supplies.
- Offset Balancing Capability: Allows for offset voltage nulling.
- High-Reliability Automotive Applications: Compliant to automotive standards and MIL-PRF-38535.
- Differential Input Voltage: Up to ±30 V.
Applications
- Desktop PCs: Used in various PC applications for voltage comparison and switching.
- Body Control Modules: Utilized in automotive systems for control and monitoring.
- White Goods: Applied in household appliances for control circuits.
- Building Automation: Used in automation systems for building management.
- Oscillators and Peak Detectors: Employed in signal processing and detection circuits).
Q & A
- What is the maximum response time of the LM311P3? The maximum response time is approximately 200 ns for a 100 mV input step with 5 mV overdrive).
- Can the LM311P3 operate from a single 5-V supply? Yes, it can operate from a single 5-V supply as well as from ±15-V supplies).
- What is the maximum input bias current of the LM311P3? The maximum input bias current is 300 nA).
- Does the LM311P3 have strobe capability? Yes, it has strobe capability, allowing the output to be turned off regardless of the differential input when the strobe is low).
- What is the maximum differential input voltage for the LM311P3? The maximum differential input voltage is ±30 V).
- Can the outputs of the LM311P3 be isolated from system ground? Yes, all inputs and outputs can be isolated from system ground).
- What is the maximum output current of the LM311P3? The device can drive loads up to 50 mA).
- Is the LM311P3 compliant with automotive standards? Yes, it is compliant with automotive standards and MIL-PRF-38535).
- What is the operating temperature range of the LM311P3? The operating temperature range is from 0°C to 70°C).
- Can the LM311P3 be used in building automation systems? Yes, it can be used in various automation systems, including building automation).
