Overview
The LM211DR2, produced by ON Semiconductor, is a single comparator integrated circuit that offers high versatility and reliability in various electronic applications. This device is part of the LM211/LM311 family, known for its ability to operate from a single power supply of 5.0 V to 30 V or ±15 V split supplies. The LM211DR2 is designed to be Pb-free and RoHS compliant, making it suitable for modern electronic designs.
The comparator features isolated inputs that can be referenced to system ground, while the output can drive loads referenced to ground, VCC, or VEE. This flexibility allows it to drive DTL, RTL, TTL, or MOS logic, as well as relays, lamps, or solenoids.
Key Specifications
| Characteristic | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Total Supply Voltage | VCC + |VEE| | Vdc | - | - | 36 |
| Output to Negative Supply Voltage | VO - VEE | Vdc | - | - | 50 |
| Input Offset Voltage (RS ≤ 50 kΩ, TA = +25°C) | VIO | mV | -0.7 | 3.0 | 4.0 |
| Input Offset Current (TA = +25°C) | IIO | nA | -1.7 | 10 | 20 |
| Input Bias Current (TA = +25°C) | IIB | nA | -45 | 100 | 150 |
| Voltage Gain | AV | V/mV | 40 | 200 | - |
| Response Time | - | ns | - | - | 200 |
| Saturation Voltage (VID ≤ -5.0 mV, IO = 50 mA, TA = 25°C) | VOL | V | - | 0.75 | 1.5 |
| Positive Supply Current | ICC | mA | - | 2.4 | 6.0 |
| Negative Supply Current | IEE | mA | - | -1.3 | -5.0 |
| Operating Ambient Temperature Range | TA | °C | -25 | - | 85 |
Key Features
- Operates from a single power supply of 5.0 V to 30 V or ±15 V split supplies.
- Isolated inputs can be referenced to system ground.
- Output can drive loads referenced to ground, VCC, or VEE.
- Can drive DTL, RTL, TTL, or MOS logic.
- Capable of switching voltages up to 50 V at currents up to 50 mA.
- Pb-free and RoHS compliant.
- Strobe capability for additional control.
- High voltage gain (40 to 200 V/mV).
- Fast response time (200 ns).
Applications
- Relay drivers with strobe capability.
- Lamp and solenoid drivers.
- Zero-crossing detectors.
- Driving CMOS logic.
- General-purpose comparator applications in industrial, automotive, and consumer electronics.
- Systems requiring high-speed and stable output responses.
Q & A
- What is the operating voltage range of the LM211DR2?
The LM211DR2 operates from a single power supply of 5.0 V to 30 V or ±15 V split supplies.
- What is the maximum output voltage and current the LM211DR2 can handle?
The LM211DR2 can switch voltages up to 50 V at currents up to 50 mA.
- Is the LM211DR2 Pb-free and RoHS compliant?
Yes, the LM211DR2 is Pb-free and RoHS compliant.
- What is the typical response time of the LM211DR2?
The typical response time of the LM211DR2 is 200 ns.
- Can the LM211DR2 drive different types of logic?
Yes, the LM211DR2 can drive DTL, RTL, TTL, or MOS logic.
- What is the strobe capability of the LM211DR2?
The LM211DR2 has a strobe capability that allows for additional control over the output.
- What are the input offset voltage and current specifications for the LM211DR2?
The input offset voltage is -0.7 to 4.0 mV, and the input offset current is -1.7 to 20 nA at TA = +25°C.
- What is the operating ambient temperature range for the LM211DR2?
The operating ambient temperature range for the LM211DR2 is -25°C to +85°C.
- How should the power supply bypass capacitors be placed in relation to the LM211DR2?
The power supply bypass capacitors should be located within a couple of inches of the LM211DR2.
- What precautions should be taken to avoid oscillations in comparator applications?
To avoid oscillations, ensure that the inputs are as small and compact as possible, surrounded by ground foil, and that power supplies are bypassed with capacitors. Additionally, adding hysteresis can prevent oscillation and excessive noise.
