Texas Instruments OPA325
The OPA325, OPA2325, and OPA4325 (OPAx325) are precision, low-voltage complementary metal-oxide semiconductor (CMOS) operational amplifiers optimized for very low noise and wide bandwidth, while operating on a low quiescent current of only 650 μA. The OPAx325 feature a linear input stage with zerocrossover distortion that delivers excellent commonmode rejection ratio (CMRR) of typically 114 dB over the entire input range. The input common-mode range extends 100 mV beyond the negative and positive supply rails.| Part No. | OPA325 |
|---|---|
| Datasheet | OPA325 Download |
| Manufacturer |  Texas Instruments |
| Description | CMOS Operational Amplifier |
| Buy | Stock & Price |
FEATURES
●1 Precision with zero-crossover distortion: – Low offset voltage: 150 μV (maximum) – High CMRR: 114 dB – Rail-to-rail I/O● Wide bandwidth: 10 MHz
● Quiescent current: 650 μA/ch
● 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 2
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 Offset Voltage vs Input Common-Mode Voltage VOS ( V) 150 125 100 75 50 25 0 ±25 ±50 ±75 ±100 ±125 ±150 ±3 VCM = ±2.85 V ±2 ±1 0 VCM (V) VCM = 2.85 V 12 3 C003 3
DESCRIPTION
The output voltage typically swings within 10 mV of the rails. The zero-crossover distortion, combined with wide bandwidth (10 MHz), high slew rate (5 V/µs), and low noise (9 nV/√Hz), make the OPAx325 a very good successive-approximation register (SAR) analog-todigital converter (ADC) input driver amplifier.
