Overview
The OPA344NA/250G4, part of the OPA344 series from Texas Instruments, is a rail-to-rail CMOS operational amplifier designed for precision, low-power, and miniature applications. This amplifier is optimized for single-supply operation from 2.5V to 5.5V, making it highly versatile and easy to use in various electronic systems. The OPA344 is unity gain stable, which means it can operate effectively without the need for additional gain-setting components. It is well-suited for general-purpose, audio, and data acquisition applications, as well as for driving sampling analog-to-digital converters and providing I/V conversion at the output of D/A converters.
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 | |
| Gain-Bandwidth Product | 1 | MHz | |||
| Slew Rate | 0.8 | V/µs | |||
| Quiescent Current (IQ) | VS = 5.5V, IO = 0 | 150 | 250 | 300 | µA |
| Operating Temperature Range | –40 | 85 | °C | ||
| Thermal Resistance (θJA) | SOT23-5 Surface Mount | 200 | °C/W |
Key Features
- Rail-to-Rail Input and Output: The OPA344 has an input common-mode voltage range that extends 300mV beyond the supply rails, and the output voltage swing is within 1mV of the supply rails, enhancing dynamic range in low supply applications.
- Low Quiescent Current: With a typical quiescent current of 150µA, this amplifier is suitable for low-power applications.
- Unity Gain Stability: The OPA344 is unity gain stable, making it easy to use in a variety of configurations without additional gain-setting components.
- High Gain-Bandwidth Product: The OPA344 has a gain-bandwidth product of 1MHz, ensuring good performance in high-frequency applications.
- Low Total Harmonic Distortion + Noise (THD+N): With a THD+N of 0.006%, this amplifier is suitable for audio and other high-fidelity applications.
- Multiple Package Options: Available in SOT23-5, MSOP-8, SO-8, TSSOP-14, and other packages, offering design flexibility.
- Wide Operating Temperature Range: Specified for operation from –40°C to 85°C, making it suitable for a wide range of environmental conditions.
Applications
- PCMCIA Cards: Ideal for use in PCMCIA cards due to its low power consumption and small package size.
- Data Acquisition: Suitable for data acquisition systems where precision and low noise are critical.
- Process Control: Used in process control systems for precise signal amplification and conditioning.
- Audio Processing: Well-suited for audio applications due to its low THD+N and rail-to-rail output swing.
- Communications: Applied in communication systems for signal amplification and conditioning.
- Active Filters: Used in active filter circuits to provide precise filtering with low power consumption.
- Test Equipment: Utilized in test equipment for precise signal measurement and conditioning.
Q & A
- What is the typical quiescent current of the OPA344?
The typical quiescent current of the OPA344 is 150µA.
- What is the gain-bandwidth product of the OPA344?
The gain-bandwidth product of the OPA344 is 1MHz.
- What is the slew rate of the OPA344?
The slew rate of the OPA344 is 0.8V/µs.
- What is the operating temperature range of the OPA344?
The OPA344 is specified for operation from –40°C to 85°C.
- What are the available package options for the OPA344?
The OPA344 is available in SOT23-5, MSOP-8, SO-8, TSSOP-14, and other packages.
- Is the OPA344 suitable for audio applications?
Yes, the OPA344 is well-suited for audio applications due to its low THD+N and rail-to-rail output swing.
- Can the OPA344 operate on a single supply?
Yes, the OPA344 is optimized to operate on a single supply from 2.5V to 5.5V.
- What is the input common-mode voltage range of the OPA344?
The input common-mode voltage range of the OPA344 extends 300mV beyond the supply rails.
- Is the OPA344 unity gain stable?
Yes, the OPA344 is unity gain stable.
- What is the thermal resistance of the OPA344 in a SOT23-5 package?
The thermal resistance of the OPA344 in a SOT23-5 package is 200°C/W.
