Overview
The LM211D from Texas Instruments is a single high-speed voltage comparator. It is part of the LM111, LM211, and LM311 family, designed to operate over a wide range of power-supply voltages, from standard ±15 V operational amplifier supplies down to a single 5-V supply used for IC logic. The LM211D is specifically rated for an operating temperature range of −40°C to +85°C, making it suitable for various industrial and automotive applications. The device features low input currents and is compatible with RTL, DTL, TTL, and MOS circuits. 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 | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage | RS ≤ 50kΩ, TA = 25°C | 0.7 | 3 | 4 | mV |
| Input Offset Current | TA = 25°C | 4 | 10 | 20 | nA |
| Input Bias Current | 1 V ≤ VO ≤ 14 V, TA = 25°C | 60 | 100 | 150 | nA |
| Common-Mode Input-Voltage Range | VCC± = ±15 V | -14.7 | -14.5 | -14.7 | V |
| Response Time | TA = 25°C | - | 165 | - | ns |
| Output Current | VIN ≤ -5 mV, IOUT = 50 mA | - | - | 50 | mA |
| Supply Voltage | - | 5 | - | ±15 | V |
| Operating Temperature Range | - | -40 | - | 85 | °C |
Key Features
- Fast Response Time: 165 ns response time, making it suitable for high-speed applications.
- Strobe Capability: The device includes a strobe pin that allows for external control of the output state.
- Low Input Currents: Maximum input bias current of 150 nA and maximum input offset current of 20 nA.
- Wide Supply Voltage Range: Can operate from a single 5-V supply to ±15 V supplies.
- Output Compatibility: Output levels are compatible with TTL, DTL, and MOS circuits.
- Isolated Inputs and Outputs: All inputs and outputs can be isolated from system ground, and the output can drive loads referenced to ground, VCC+, or VCC-.
- Offset Balancing and Wire-OR Capability: Provides balance and strobe pins for external offset adjustment or trimming, and outputs can be wire-OR connected.
Applications
- Desktop PCs: Used in various PC applications requiring voltage comparison.
- Body Control Modules: Suitable for automotive body control modules due to its automotive-grade temperature range.
- White Goods: Used in household appliances for voltage monitoring and control.
- Building Automation: Employed in building automation systems for sensor and control applications.
- Oscillators and Peak Detectors: Can be used in oscillator circuits and peak detector applications.
Q & A
- What is the operating temperature range of the LM211D?
The LM211D operates over a temperature range of −40°C to +85°C.
- What is the maximum input bias current of the LM211D?
The maximum input bias current is 150 nA.
- Can the LM211D drive loads directly?
Yes, the LM211D can drive loads such as lamps or relays, switching voltages up to 50 V at 50 mA.
- What is the response time of the LM211D?
The response time is 165 ns.
- Is the LM211D compatible with TTL and MOS circuits?
Yes, the output levels of the LM211D are compatible with TTL, DTL, and MOS circuits.
- Can the inputs and outputs of the LM211D be isolated from system ground?
Yes, all inputs and outputs can be isolated from system ground.
- What is the strobe capability of the LM211D?
The LM211D includes a strobe pin that allows for external control of the output state, keeping the output in the off state if the strobe is low.
- What is the common-mode input-voltage range of the LM211D?
The common-mode input-voltage range is from -14.7 V to 13.8 V when VCC± = ±15 V.
- Can the LM211D be used in automotive applications?
Yes, the LM211D is suitable for automotive applications due to its temperature range and reliability features.
- What is the power dissipation of the LM211D?
The power dissipation is approximately 135 mW at ±15 V supply.
