Overview
The OPA2325IDR, part of the OPAx325 family, is a precision, low-voltage complementary metal-oxide semiconductor (CMOS) operational amplifier produced by Texas Instruments. This dual-channel operational amplifier is optimized for very low noise and wide bandwidth while operating on a low quiescent current. It features a linear input stage with zero-crossover distortion, delivering an excellent common-mode rejection ratio (CMRR) of typically 114 dB over the entire input range. The device is suitable for a wide range of applications requiring high precision and low power consumption.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 2.2 | - | 5.5 | V |
| Input Offset Voltage (VOS) | 40 | 150 | - | µV |
| Input Offset Voltage Drift (dVOS/dT) | 2 | 7.5 | - | µV/°C |
| Common-Mode Rejection Ratio (CMRR) | - | 114 | - | dB |
| Power-Supply Rejection Ratio (PSRR) | - | - | - | dB |
| Quiescent Current per Amplifier (IQ) | 0.65 | 0.75 | 0.8 | mA |
| Bandwidth | - | 10 | - | MHz |
| Slew Rate | - | 5 | - | V/µs |
| Input Bias Current | - | 0.2 | - | pA |
| Noise (at 10 kHz) | - | 9 | - | nV/√Hz |
| Output Voltage Swing from Rails | 10 | 20 | - | mV |
Key Features
- Rail-to-Rail I/O: The output voltage typically swings within 10 mV of the supply rails.
- High CMRR: Common-mode rejection ratio of typically 114 dB over the entire input range.
- Wide Bandwidth: 10 MHz bandwidth for high-frequency applications.
- Low Quiescent Current: Only 650 µA per amplifier, making it suitable for low-power applications.
- Low Noise: 9 nV/√Hz at 10 kHz, ideal for precision applications.
- High Slew Rate: 5 V/µs for fast signal response.
- Unity-Gain Stable: Stable operation at unity gain.
- Wide Supply-Voltage Range: Operates from 2.2 V to 5.5 V, suitable for battery-powered devices.
Applications
- High-Z Sensor Signal Conditioning: Ideal for conditioning signals from high-impedance sensors.
- Transimpedance Amplifiers: Suitable for converting current signals to voltage signals.
- Test and Measurement Equipment: Used in various test and measurement instruments.
- Programmable Logic Controllers (PLCs): Employed in industrial control systems.
- Motor Control Loops: Used in motor control circuits for precise control.
- Communications: Applied in communication systems for signal amplification.
- Input, Output ADC, and DAC Buffers: Acts as a buffer for analog-to-digital and digital-to-analog converters.
- Active Filters: Used in active filter circuits for signal processing.
Q & A
- What is the typical bandwidth of the OPA2325?
The typical bandwidth of the OPA2325 is 10 MHz.
- What is the quiescent current per amplifier for the OPA2325?
The quiescent current per amplifier is 650 µA.
- What is the common-mode rejection ratio (CMRR) of the OPA2325?
The CMRR is typically 114 dB over the entire input range.
- What is the slew rate of the OPA2325?
The slew rate is 5 V/µs.
- What is the input bias current of the OPA2325?
The input bias current is 0.2 pA.
- What is the noise level of the OPA2325 at 10 kHz?
The noise level is 9 nV/√Hz at 10 kHz.
- What are the typical output voltage swing limits from the supply rails?
The output voltage typically swings within 10 mV of the supply rails.
- Is the OPA2325 unity-gain stable?
Yes, the OPA2325 is unity-gain stable.
- What is the operating supply voltage range for the OPA2325?
The operating supply voltage range is from 2.2 V to 5.5 V.
- In what packages is the OPA2325 available?
The OPA2325 is available in SO-8 and MSOP-8 packages.
