Overview
The OPA325IDBVR, produced by Texas Instruments, is a precision, low-voltage complementary metal-oxide semiconductor (CMOS) operational amplifier. It is part of the OPAx325 family, which includes the OPA2325 and OPA4325. This device is optimized for very low noise and wide bandwidth while operating on a low quiescent current. The OPA325 is particularly suited for applications requiring high dc precision, low noise, and wide bandwidth, making it an excellent choice for battery-powered devices without regulation.
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 |
| Power-Supply Rejection Ratio (PSRR) | - | - | - | dB |
| Common-Mode Rejection Ratio (CMRR) | - | 114 | - | dB |
| Bandwidth | - | 10 | - | MHz |
| Quiescent Current per Amplifier (IQ) | 0.65 | 0.75 | 0.8 | mA |
| Input Bias Current | - | 0.2 | - | pA |
| Noise (at 10 kHz) | - | 9 | - | nV/√Hz |
| Slew Rate | - | 5 | - | V/μs |
| Output Voltage Swing from Rails | 10 | - | 30 | mV |
Key Features
- Precision with zero-crossover distortion
- Low offset voltage: up to 150 μV
- High CMRR: typically 114 dB
- Rail-to-rail I/O
- Wide bandwidth: 10 MHz
- Low quiescent current: 650 μA per channel
- Single-supply voltage range: 2.2 V to 5.5 V
- Low input bias current: 0.2 pA
- Low noise: 9 nV/√Hz at 10 kHz
- Slew rate: 5 V/μs
- Unity-gain stable
Applications
- High-Z sensor signal conditioning
- Transimpedance amplifiers
- Test and measurement equipment
- Programmable logic controllers (PLCs)
- Motor control loops
- Communications
- Input, output ADC, and DAC buffers
- Active filters
Q & A
- What is the typical bandwidth of the OPA325?
The OPA325 has a typical bandwidth of 10 MHz. - What is the input offset voltage of the OPA325?
The input offset voltage of the OPA325 is up to 150 μV. - What is the common-mode rejection ratio (CMRR) of the OPA325?
The CMRR of the OPA325 is typically 114 dB. - What is the quiescent current per amplifier for the OPA325?
The quiescent current per amplifier for the OPA325 is 650 μA. - What is the slew rate of the OPA325?
The slew rate of the OPA325 is 5 V/μs. - What are the typical applications of the OPA325?
The OPA325 is typically used in high-Z sensor signal conditioning, transimpedance amplifiers, test and measurement equipment, PLCs, motor control loops, communications, and as input/output buffers for ADCs and DACs. - What is the supply voltage range for the OPA325?
The supply voltage range for the OPA325 is from 2.2 V to 5.5 V. - Is the OPA325 rail-to-rail?
Yes, the OPA325 has rail-to-rail I/O. - What is the noise level of the OPA325 at 10 kHz?
The noise level of the OPA325 at 10 kHz is 9 nV/√Hz. - What package options are available for the OPA325?
The OPA325 is available in the SOT23-5 package.
