Overview
The LM311DR2, produced by onsemi, is a single voltage comparator that offers high versatility and reliability. It can operate from a single power supply of 5.0 V to 30 V or from ±15 V split supplies, making it compatible with a wide range of applications, including those using operational amplifiers. The device features low input currents and the ability to drive loads referenced to ground, VCC, or VEE, enabling it to interface with DTL, RTL, TTL, and MOS logic circuits. Additionally, the LM311DR2 can switch voltages up to 50 V at currents up to 50 mA, making it suitable for driving relays, lamps, or solenoids.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Total Supply Voltage | VCC + |VEE| | 36 | Vdc |
| Output to Negative Supply Voltage | VO - VEE | 50 | Vdc |
| Input Offset Voltage (RS ≤ 50 kΩ, TA = +25°C) | VIO | 0.7 - 7.5 | mV |
| Input Offset Current (TA = +25°C) | IIO | 1.7 - 70 | nA |
| Input Bias Current (TA = +25°C) | IIB | 45 - 300 | nA |
| Large Signal Voltage Gain | AV | 40 - 200 | V/mV |
| Response Time | t_res | 200 | ns |
| Saturation Voltage (VID ≤ -5.0 mV, IO = 50 mA, TA = 25°C) | VOL | 0.75 - 1.5 | V |
| Positive Supply Current (ICC+) | ICC+ | 2.4 - 7.5 | mA |
| Negative Supply Current (ICC-) | ICC- | 1.3 - 5.0 | mA |
| Operating Temperature Range | Toper | -40 to +105°C | °C |
Key Features
- Operates from a single power supply of 5.0 V to 30 V or from ±15 V split supplies.
- Low input currents: maximum input bias current of 300 nA and maximum input offset current of 70 nA.
- Differential input voltage range: ±30 V.
- Output compatible with RTL, DTL, TTL, and MOS logic circuits.
- Can switch voltages up to 50 V at currents up to 50 mA, suitable for driving relays, lamps, or solenoids.
- Strobe capability allows the output to be turned off regardless of the differential input.
- Offset balancing and wire-OR output connection capability.
- Pb-free and RoHS compliant).
Applications
- Driving relays, lamps, or solenoids due to its high output current capability).
- Interface with various logic circuits including DTL, RTL, TTL, and MOS).
- Used in systems requiring voltage comparison and high output drive capability, such as in industrial control systems, automotive systems, and medical devices).
- Suitable for applications requiring low power consumption and high reliability, such as in battery-powered devices and critical control systems).
Q & A
- What is the operating voltage range of the LM311DR2?
The LM311DR2 can operate from a single power supply of 5.0 V to 30 V or from ±15 V split supplies).
- What is the maximum output current of the LM311DR2?
The LM311DR2 can switch voltages up to 50 V at currents up to 50 mA).
- What is the input offset voltage range of the LM311DR2?
The input offset voltage range is 0.7 to 7.5 mV for RS ≤ 50 kΩ at TA = +25°C).
- Can the LM311DR2 drive TTL logic circuits?
Yes, the LM311DR2 output is compatible with TTL logic circuits among others).
- What is the strobe function in the LM311DR2?
The strobe function allows the output to be turned off regardless of the differential input when the strobe is low).
- Is the LM311DR2 Pb-free and RoHS compliant?
Yes, the LM311DR2 is Pb-free and RoHS compliant).
- What is the operating temperature range of the LM311DR2?
The operating temperature range is -40 to +105°C).
- Can the inputs of the LM311DR2 be isolated from system ground?
Yes, the inputs of the LM311DR2 can be isolated from system ground while the output can drive loads referenced to ground, VCC, or VEE).
- What is the typical response time of the LM311DR2?
The typical response time is 200 ns).
- What are the package options for the LM311DR2?
The LM311DR2 is available in SOIC-8 packages).
