Overview
The LM211P, produced by Texas Instruments, is a single high-speed voltage comparator. It is part of the LMx11 series, which includes the LM111 and LM311. These devices are 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. The LM211P is specifically rated for a temperature range of –40°C to +85°C, making it suitable for various industrial and automotive applications.
The comparator features low input currents, fast response times, and the ability to drive loads such as lamps or relays, switching voltages up to 50 V at currents up to 50 mA. The outputs are compatible with most TTL, DTL, and MOS circuits, and can be isolated from system ground, allowing flexibility in circuit design.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Offset Voltage | 0.7 | 3.0 | 7.5 | mV |
| Input Offset Current | 4.0 | 10 | 50 | nA |
| Input Bias Current | 60 | 100 | 250 | nA |
| Voltage Gain | 40 | 200 | V/mV | |
| Response Time | 115 | 200 | ns | |
| Saturation Voltage | 0.75 | 1.5 | V | |
| Output Current | 50 | mA | ||
| Positive Supply Current | 5.1 | 6.0 | mA | |
| Negative Supply Current | 4.1 | 5.0 | mA | |
| Operating Temperature Range | –40 | 85 | °C |
Key Features
- Fast response time: 115 ns to 200 ns for low-to-high and high-to-low level output transitions.
- Low input bias current: Maximum of 250 nA.
- Low input offset current: Maximum of 50 nA.
- Wide supply voltage range: From single 5-V supply to ±15-V supplies.
- Output compatible with TTL, DTL, and MOS circuits.
- Ability to drive lamps or relays, switching voltages up to 50 V at 50 mA.
- Offset balancing and strobe capabilities.
- Outputs can be wire-OR connected.
- Isolated inputs and outputs from system ground.
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.
- Zero-crossing detectors and other general comparator applications.
Q & A
- What is the typical response time of the LM211P?
The response time of the LM211P is typically around 115 ns to 200 ns for low-to-high and high-to-low level output transitions.
- What is the maximum input bias current of the LM211P?
The maximum input bias current of the LM211P is 250 nA.
- What is the operating temperature range of the LM211P?
The operating temperature range of the LM211P is –40°C to +85°C.
- Can the LM211P drive loads such as lamps or relays?
- What is the input voltage range for the LM211P?
The input voltage range for the LM211P can go up to ±30 V, with the positive input voltage limit being 30 V above the negative supply, and the negative input voltage limit being equal to the negative supply voltage or 30 V below the positive supply, whichever is less.
- Does the LM211P have strobe capability?
- Can the outputs of the LM211P be isolated from system ground?
- What are some common applications of the LM211P?
- Is the LM211P compatible with TTL and MOS circuits?
- How does the LM211P handle offset balancing?
