Overview
The LM211DE4, produced by Texas Instruments, is a high-speed voltage comparator that belongs to the LMx11 family. This device is designed to operate from a wide range of power-supply voltages, including standard ±15V op-amp supplies and single 5-V supplies for logic systems. The LM211 is particularly noted for its performance over a temperature range of −40°C to +85°C, making it suitable for various industrial and automotive applications. The comparator features low input bias and offset currents, fast response times, and the ability to drive loads up to 50 V at 50 mA. The outputs are compatible with TTL, DTL, and MOS circuits, and can be isolated from system ground, allowing for flexible integration into different systems.
Key Specifications
| Parameter | Test Conditions | Unit | Typical Value | Maximum Value |
|---|---|---|---|---|
| Input Offset Voltage (VIO) | TA = 25°C | mV | 3 | 10 |
| 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 |
| Output Current | - | mA | - | 50 |
| Operating Temperature Range | - | °C | -40 | 85 |
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 the output to be in the off state 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.
- Single 5-V supply operation: Compatible with logic systems.
- Output compatibility: Compatible with TTL, DTL, and MOS circuits.
- Isolated inputs and outputs: Can be isolated from system ground.
- Offset balancing: External offset adjustment or trimming available.
- Wire-OR capability: Outputs can be wire-OR connected.
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 environmental control and monitoring systems.
- Oscillators and Peak Detectors: In signal processing and measurement applications.
Q & A
- What is the typical response time of the LM211DE4?
The typical response time for the LM211DE4 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 LM211DE4?
The maximum input bias current is 300 nA.
- Can the LM211DE4 operate from a single 5-V supply?
- What is the strobe capability of the LM211DE4?
The strobe capability allows the output to be in the off state regardless of the differential input when the strobe is low.
- What are the typical applications of the LM211DE4?
The LM211DE4 is used in desktop PCs, body control modules, white goods, building automation, oscillators, and peak detectors.
- How can the inputs and outputs of the LM211DE4 be isolated?
The inputs and outputs of the LM211DE4 can be isolated from system ground, allowing for flexible integration into different systems.
- What is the maximum output current of the LM211DE4?
The maximum output current is 50 mA.
- What is the operating temperature range of the LM211DE4?
The operating temperature range is −40°C to +85°C.
- Is the LM211DE4 compatible with TTL and MOS circuits?
- Can the outputs of the LM211DE4 be wire-OR connected?
