Overview
The OPA344NA/3KG4 is a part of the OPA344 series of rail-to-rail CMOS operational amplifiers produced by Texas Instruments. These amplifiers are designed for precision, low-power, and miniature applications. The OPA344 is unity gain stable, making it highly versatile and easy to use in a variety of configurations. It operates on a single supply voltage ranging from 2.5V to 5.5V, with an input common-mode voltage range that extends 300mV beyond the supply rails. This amplifier is well-suited for general-purpose, audio, and other applications requiring low power consumption and high precision.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = +5.5V, VCM = VS/2 | ±0.2 | ±1 | ±1.2 | mV |
| Power Supply Rejection Ratio (PSRR) | VS = 2.7V to 5.5V, VCM < (V+) -1.8V | 30 | 200 | - | µV/V |
| Common-Mode Rejection Ratio (CMRR) | VS = +2.7V, –0.3V < VCM < 3V | 66 | 80 | - | dB |
| Open-Loop Voltage Gain (AOL) | RL = 100kΩ, 10mV < VO < (V+) –10mV | 104 | 122 | - | dB |
| Gain-Bandwidth Product (GBW) | - | - | 1 | - | MHz |
| Slew Rate (SR) | - | - | 0.8 | - | V/µs |
| Quiescent Current (IQ) | VS = 5.5V, IO = 0 | 150 | 250 | 300 | µA |
| Operating Temperature Range | - | -40 | - | 85 | °C |
Key Features
- Rail-to-Rail Input and Output: The OPA344 has rail-to-rail input and output capabilities, allowing the input common-mode voltage range to extend 300mV beyond the supply rails and the output to swing to within 1mV of the supply rails.
- Low Power Consumption: The amplifier has a low quiescent current of 150µA (typical) and 250µA (maximum), making it suitable for low-power applications.
- Unity Gain Stability: The OPA344 is unity gain stable, which simplifies its use in various configurations.
- High Precision: Features low input offset voltage and high open-loop voltage gain, ensuring high precision in applications.
- Compact Packages: Available in SOT23-5, MSOP-8, SO-8, TSSOP-14, and other compact packages, making it ideal for space-constrained designs.
- Wide Operating Temperature Range: Specified to operate from –40°C to +85°C, ensuring reliability in a variety of environmental conditions.
Applications
- PCMCIA Cards: Suitable for use in PCMCIA cards due to its low power consumption and compact size.
- Data Acquisition: Ideal for data acquisition systems requiring high precision and low noise.
- Process Control: Used in process control systems where precision and reliability are crucial.
- Audio Processing: Well-suited for audio applications due to its low distortion and high dynamic range.
- Communications: Applied in communication systems for signal amplification and conditioning.
- Active Filters: Used in active filter designs to provide precise filtering capabilities.
- Test Equipment: Employed in test equipment for accurate signal measurement and amplification.
Q & A
- What is the typical quiescent current of the OPA344NA/3KG4?
The typical quiescent current is 150µA, with a maximum of 250µA.
- What is the gain-bandwidth product of the OPA344NA/3KG4?
The gain-bandwidth product is 1 MHz.
- What is the slew rate of the OPA344NA/3KG4?
The slew rate is 0.8 V/µs.
- What is the operating temperature range of the OPA344NA/3KG4?
The specified operating temperature range is from –40°C to +85°C.
- What are the available package types for the OPA344NA/3KG4?
The OPA344 is available in SOT23-5, MSOP-8, SO-8, TSSOP-14, and other compact packages.
- Is the OPA344NA/3KG4 suitable for audio applications?
Yes, it is well-suited for audio applications due to its low distortion and high dynamic range.
- Can the OPA344NA/3KG4 operate on a single supply voltage?
Yes, it can operate on a single supply voltage ranging from 2.5V to 5.5V.
- What is the input common-mode voltage range of the OPA344NA/3KG4?
The input common-mode voltage range extends 300mV beyond the supply rails.
- Is the OPA344NA/3KG4 unity gain stable?
Yes, the OPA344 is unity gain stable.
- What is the typical input offset voltage of the OPA344NA/3KG4?
The typical input offset voltage is ±1 mV.
