Overview
The LM211QD, produced by Texas Instruments, is a high-speed voltage comparator that belongs to the LMx11 family. These devices are designed to operate over a wide range of power supply voltages, from standard ±15V operational amplifier supplies down to a single 5-V supply used in IC logic systems. The LM211QD is specifically tailored for high-reliability applications, with a temperature range of −40°C to +125°C, making it suitable for demanding environments.
The LM211QD features low input bias and offset currents, fast response times, and the ability to drive loads such as lamps or relays, switching voltages up to 50 V at currents of up to 50 mA. The device also includes offset balancing and strobe capabilities, and its outputs can be wire-OR connected, enhancing its versatility in various applications.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Maximum Input Bias Current | 300 | nA |
| Maximum Input Offset Current | 70 | nA |
| Response Time (Low-to-High Level Output) | 115 | ns |
| Response Time (High-to-Low Level Output) | 165 | ns |
| Operating Temperature Range | −40°C to +125°C | °C |
| Supply Voltage Range | ±15 V, single 5-V supply | V |
| Output Voltage Capability | Up to 50 V at 50 mA | V, mA |
Key Features
- Fast response time: 115 ns (low-to-high level output) and 165 ns (high-to-low level output)
- Strobe capability: Allows the output to be in the off state when the strobe is low, regardless of the differential input
- Low input bias and offset currents: Maximum input bias current of 300 nA and maximum input offset current of 70 nA
- Wide supply voltage range: Can operate from ±15 V supplies to a single 5-V supply
- Output compatibility: Compatible with TTL, DTL, RTL, and MOS circuits
- Isolated inputs and outputs: Can be isolated from system ground, and outputs can drive loads referenced to ground, VCC+, or VCC−
- Offset balancing: External offset adjustment or trimming available
- Wire-OR capability: Outputs can be wire-OR connected
Applications
- Desktop PCs
- Body Control Modules
- White Goods
- Building Automation
- Oscillators
- Peak Detectors
- Level shifting to higher or lower voltage levels
- General comparator applications in various electronic systems
Q & A
- What is the temperature range of the LM211QD?
The LM211QD operates over a temperature range of −40°C to +125°C
- What is the maximum input bias current of the LM211QD?
The maximum input bias current is 300 nA
- Can the LM211QD operate from a single 5-V supply?
- What is the response time of the LM211QD?
The response time is 115 ns for low-to-high level output and 165 ns for high-to-low level output
- What is the maximum output voltage and current capability of the LM211QD?
The LM211QD can switch voltages up to 50 V at currents as high as 50 mA
- Does the LM211QD have strobe capability?
- Can the inputs and outputs of the LM211QD be isolated from system ground?
- What types of circuits is the output of the LM211QD compatible with?
The output is compatible with TTL, DTL, RTL, and MOS circuits
- Can the outputs of the LM211QD be wire-OR connected?
- What are some common applications of the LM211QD?
