Overview
The LM211DR, 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 operational amplifier supplies and single 5-V logic supplies. The LM211DR is known for its fast response time, low input bias current, and compatibility with various logic circuits such as TTL and MOS.
The device features an open-collector output stage, allowing it to drive loads referenced to ground, VCC+, or VCC–. It also includes offset balancing and strobe capabilities, making it versatile for various applications. The LM211DR is particularly suited for environments requiring operation over a temperature range of −40°C to +85°C, making it suitable for automotive and industrial applications.
Key Specifications
| Parameter | Test Conditions | Typical Value | Maximum Value | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VIO) | TA = 25°C | 3 | 10 | mV |
| Input Offset Current (IIO) | TA = 25°C | 10 | 70 | nA |
| Input Bias Current (IIB) | 1 V ≤ VO ≤ 14 V, TA = 25°C | 100 | 300 | nA |
| Response Time (Low-to-High-Level Output) | RC = 500 Ω to 5 V, CL = 5 pF, TA = 25°C | 115 | - | ns |
| Response Time (High-to-Low-Level Output) | RC = 500 Ω to 5 V, CL = 5 pF, TA = 25°C | 165 | - | ns |
| Supply Current from VCC+ (ICC+) | VID = –10 mV, No load, TA = 25°C | 5.1 | 7.5 | mA |
| Supply Current from VCC– (ICC–) | VID = 10 mV, No load, TA = 25°C | –4.1 | –5 | mA |
| Operating Temperature Range | - | - | −40°C to +85°C | - |
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.
- Operates from a single 5-V supply or ±15-V supplies.
- Output compatible with TTL, DTL, and MOS circuits.
- Can drive lamps or relays, switching voltages up to 50 V at 50 mA.
- Offset balancing and wire-OR output capabilities.
- Available in various packages including SOIC, PDIP, and TSSOP.
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 signal processing and measurement applications.
- Level Shifting: To convert signals between different voltage levels.
Q & A
- What is the typical response time of the LM211DR?
The typical response time for the LM211DR 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 LM211DR?
The maximum input bias current is 300 nA.
- Can the LM211DR operate from a single 5-V supply?
- What is the strobe capability of the LM211DR?
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 LM211DR?
The LM211DR is used in desktop PCs, body control modules, white goods, building automation, oscillators, and peak detectors.
- What is the operating temperature range of the LM211DR?
The operating temperature range is −40°C to +85°C.
- Can the LM211DR drive lamps or relays?
- What are the available packages for the LM211DR?
The LM211DR is available in SOIC, PDIP, and TSSOP packages.
- Is the output of the LM211DR compatible with TTL and MOS circuits?
- Can the outputs of the LM211DR be wire-OR connected?
