OPA2325 - Precision, 10-MHz, Low-Noise, Low-Power, RRIO, CMOS Zero-Crossover Operational Amplifier

The OPA2325 is a dual, precision, low-voltage complementary metal-oxide semiconductor(CMOS) operational amplifier optimized for very low noise and wide bandwidth while operating on alow quiescent current of only 650 µA.

The OPA2325 features a linear input stage with zero-crossover distortion that deliversexcellent common-mode rejection ratio (CMRR) of typically 114 dB over the entire input range. Theinput common-mode range extends 100 mV beyond the negative and positive supply rails. The outputvoltage typically swings within 10 mV of the rails.

The zero-crossover distortion, combined with wide bandwidth (10 MHz), high slew rate (5V/µs), and low noise (9 nV/√Hz), make the OPA2325 a very goodsuccessive-approximation register (SAR) analog-to-digital converter (ADC) input driver amplifier.In addition, the OPA2325 has a wide supply-voltage range from 2.2 V to 5.5 V with excellentpower-supply rejection ratio (PSRR) over the entire supply range, making the device suitable forprecision, low-power applications that run directly from batteries without regulation.

• 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

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