Overview
The LM211, part of the LMx11 series, is a high-speed voltage comparator produced by Texas Instruments. These devices are designed to operate from a wide range of power-supply voltages, including ±15-V supplies for operational amplifiers and 5-V supplies for logic systems. The LM211 is particularly noted for its operation over a temperature range of −40°C to +85°C, making it suitable for various industrial and automotive applications. The output levels of the LM211 are compatible with most TTL and MOS circuits, and it can drive loads such as lamps or relays, switching voltages up to 50 V at currents as high as 50 mA.
Key Specifications
| Parameter | Test Conditions | Unit | Typical | Maximum |
|---|---|---|---|---|
| Input Offset Voltage (VIO) | TA = 25°C | mV | 2 | 7.5 |
| Input Offset Current (IIO) | TA = 25°C | nA | 10 | 70 |
| Input Bias Current (IIB) | 1 V ≤ VO ≤ 14 V, TA = 25°C | nA | 100 | 300 |
| Response Time (Low-to-High-Level Output) | RC = 500 Ω to 5 V, CL = 5 pF, TA = 25°C | ns | 115 | - |
| Response Time (High-to-Low-Level Output) | RC = 500 Ω to 5 V, CL = 5 pF, TA = 25°C | ns | 165 | - |
| Supply Voltage (VCC+ - VCC-) | - | V | - | 36 |
| Supply Current from VCC+ (ICC+) | VID = –10 mV, No load, TA = 25°C | mA | 5.1 | 7.5 |
| Supply Current from VCC- (ICC-) | VID = 10 mV, No load, TA = 25°C | mA | -4.1 | -5 |
Key Features
- Fast Response Time: 165 ns for high-to-low-level output and 115 ns for low-to-high-level output.
- Strobe Capability: Allows for external control of the output state.
- Low Input Bias Current: Maximum of 300 nA.
- Low Input Offset Current: Maximum of 70 nA.
- Single 5-V Supply Operation: Compatible with logic systems.
- Output Compatibility: Compatible with TTL, DTL, and MOS circuits.
- High Voltage Capability: Can drive loads up to 50 V at 50 mA.
- Offset Balancing: External adjustment or trimming available.
- Wire-OR Capability: Outputs can be connected in a wire-OR configuration.
Applications
- Desktop PCs: For voltage monitoring and level detection.
- Body Control Modules: In automotive systems for various control functions.
- White Goods: In household appliances for control and monitoring.
- Building Automation: For sensor and control systems.
- Oscillators and Peak Detectors: In various signal processing applications.
Q & A
- What is the typical response time of the LM211?
The typical response time for the LM211 is 165 ns for high-to-low-level output and 115 ns for low-to-high-level output.
- What is the maximum input bias current of the LM211?
The maximum input bias current is 300 nA.
- Can the LM211 operate from a single 5-V supply?
- What is the temperature range for the LM211?
The LM211 operates over a temperature range of −40°C to +85°C.
- What are the typical applications of the LM211?
The LM211 is used in desktop PCs, body control modules, white goods, building automation, and as oscillators and peak detectors.
- How does the strobe capability work in the LM211?
The strobe capability allows for external control of the output state. If the strobe is low, the output is in the off state, regardless of the differential input.
- Can the outputs of the LM211 be wire-OR connected?
- What is the maximum voltage that the LM211 can drive?
The LM211 can drive loads up to 50 V at currents as high as 50 mA.
- Is the LM211 compatible with TTL and MOS circuits?
- How can the offset be balanced in the LM211?
The LM211 provides balance and strobe pins for external offset adjustment or trimming.
