Overview
The LM321MFX is a low power, wide supply range performance operational amplifier produced by Texas Instruments. It is designed to bring performance and economy to low power systems, making it suitable for a wide range of applications. The LM321MFX features a high unity gain frequency and a specified 0.4-V/µs slew rate, with a quiescent current of only 430 µA per amplifier at 5 V. This operational amplifier can operate with either a single or dual power supply voltage and includes ground in its input common mode range, enabling it to function in both single and dual supply applications. It is available in the SOT-23 package, making it an economical choice without sacrificing valuable board space.
Key Specifications
| Parameter | Value |
|---|---|
| Gain-Bandwidth Product | 1 MHz |
| Low Supply Current | 430 µA |
| Low Input Bias Current | 45 nA |
| Wide Supply Voltage Range | 3 V to 32 V |
| Slew Rate | 0.4 V/µs |
| Phase Margin | 60 ° |
| Equivalent Input Noise Voltage | 40 nV/√Hz |
| Operating Temperature Range | -40°C to 85°C |
| Package | SOT-23 (DBV) |
Key Features
- High unity gain frequency and a specified 0.4-V/µs slew rate.
- Low supply current of 430 µA per amplifier at 5 V.
- Low input bias current of 45 nA.
- Wide supply voltage range from 3 V to 32 V.
- Stable with high capacitive loads.
- Single version of the LM324 operational amplifier.
- Capable of operating in single and dual supply applications.
- Class A output stage for small signal levels, converting to class B for large signal modes.
Applications
The LM321MFX is versatile and can be used in a variety of applications, including:
- Low power systems where economy and performance are crucial.
- Single and dual supply applications.
- Driving large capacitive loads.
- AC applications with capacitively coupled loads.
- Systems requiring high input common mode range, including ground.
Q & A
- What is the typical supply current of the LM321MFX?
The typical supply current is 430 µA per amplifier at 5 V.
- What is the gain-bandwidth product of the LM321MFX?
The gain-bandwidth product is 1 MHz.
- What is the slew rate of the LM321MFX?
The slew rate is 0.4 V/µs.
- What is the operating temperature range of the LM321MFX?
The operating temperature range is -40°C to 85°C.
- Can the LM321MFX operate with a single or dual power supply?
Yes, it can operate with either a single or dual power supply voltage.
- What package is the LM321MFX available in?
The LM321MFX is available in the SOT-23 (DBV) package.
- How does the LM321MFX handle capacitive loads?
The LM321MFX is stable with high capacitive loads and can accommodate values up to 50 pF in worst-case non-inverting unity gain connections.
- What is the input bias current of the LM321MFX?
The input bias current is 45 nA.
- Can the LM321MFX be used in AC applications?
Yes, it can be used in AC applications, especially with capacitively coupled loads, by using a resistor from the output to ground to increase class A bias current and reduce distortion.
- What is the phase margin of the LM321MFX?
The phase margin is 60 °.
