Overview
The OPA342NA/3K is a part of the OPA342 series of rail-to-rail CMOS operational amplifiers designed by Texas Instruments. These amplifiers are optimized for low-cost, low-power, and miniature applications. They are particularly suited for single-supply operations with a voltage range as low as 2.5V and an input common-mode voltage range that extends 300mV beyond the supply rails. This makes them highly versatile and easy to use in various applications, including communications, data acquisition, process control, audio processing, and consumer electronics.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VCM = VS/2 | ±1 | ±6 | ±6 | mV |
| Power Supply Rejection Ratio (PSRR) | VS = 2.7V to 5.5V, VCM < (V+) -1.8V | 30 | 200 | 250 | µV/V |
| Input Bias Current (IB) | ±0.2 | nA | |||
| Common-Mode Rejection Ratio (CMRR) | VS = +2.7V, –0.3V < VCM < 3V | 62 | 74 | dB | |
| Open-Loop Gain (AOL) | RL = 100kΩ, 10mV < VO < (V+) – 10mV | 104 | 124 | dB | |
| Gain-Bandwidth Product (GBW) | G = 1 | 1 | MHz | ||
| Slew Rate (SR) | 1 | V/µs | |||
| Quiescent Current (IQ) | IO = 0A | 150 | 250 | µA | |
| Operating Temperature Range | –40 | +85 | °C | ||
| Supply Voltage Range | 2.7 | 5.5 | V |
Key Features
- Rail-to-Rail Input and Output: The OPA342NA/3K features rail-to-rail input and output, allowing for a wider dynamic range, especially in low supply voltage applications.
- Low Quiescent Current: With a typical quiescent current of 150µA, these amplifiers are suitable for low-power applications.
- Single Supply Capability: The amplifiers can operate on a single supply as low as 2.5V.
- High-Speed Operation: The amplifiers have a gain-bandwidth product of 1MHz and a slew rate of 1V/µs, making them suitable for high-speed applications.
- Low Total Harmonic Distortion + Noise (THD+N): The THD+N is as low as 0.006% at 1kHz, ensuring high signal fidelity.
- MicroSIZE Package Options: Available in SOT23-5, MSOP-8, and other compact packages, making them ideal for space-limited applications.
Applications
- Communications: Suitable for various communication systems due to their high-speed and low-noise characteristics.
- Data Acquisition: Ideal for driving sampling Analog-to-Digital Converters (ADC) and providing signal conditioning in data acquisition systems.
- Process Control: Used in process control systems where precision and stability are crucial.
- Audio Processing: Well-suited for audio applications, including I/V conversion at the output of Digital-to-Analog Converters (DAC).
- Active Filters: Can be used in active filter circuits due to their high gain-bandwidth product and low distortion.
- Test Equipment: Suitable for use in test and measurement equipment where high accuracy and stability are required.
- Consumer Electronics: Used in various consumer electronic devices where low power and compact size are important.
Q & A
- What is the typical quiescent current of the OPA342NA/3K?
The typical quiescent current is 150µA.
- What is the gain-bandwidth product of the OPA342NA/3K?
The gain-bandwidth product is 1MHz.
- What is the slew rate of the OPA342NA/3K?
The slew rate is 1V/µs.
- What is the total harmonic distortion + noise (THD+N) of the OPA342NA/3K at 1kHz?
The THD+N is as low as 0.006% at 1kHz.
- What are the available package options for the OPA342NA/3K?
The available package options include SOT23-5, MSOP-8, SO-8, TSSOP-14, and others.
- What is the operating temperature range of the OPA342NA/3K?
The operating temperature range is from –40°C to +85°C.
- Can the OPA342NA/3K operate on a single supply?
Yes, it can operate on a single supply as low as 2.5V.
- What is the input common-mode voltage range of the OPA342NA/3K?
The input common-mode voltage range extends 300mV beyond the supply rails.
- How does the OPA342NA/3K handle capacitive loads?
The OPA342NA/3K can handle capacitive loads effectively, and a series resistor in the unity-gain configuration can improve capacitive load drive.
- What are some typical applications of the OPA342NA/3K?
Typical applications include communications, data acquisition, process control, audio processing, active filters, test equipment, and consumer electronics.
