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OPA2325

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

OPA2325

SBOS637 – OCTOBER 2016

OPA2325

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

1

1 Features

1

•

Precision with Zero-Crossover Distortion:

–

Low Offset Voltage: 150 μV (max)

–

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

3 Description

The OPA2325 device is a dual, precision, low-voltage

complementary metal oxide semiconductor (CMOS)

operational amplifier optimized for very low noise and

wide bandwidth when operating on a low quiescent

current of only 650 μA.

The OPA2325 features a linear input stage with zero-

crossover distortion that delivers excellent common-

mode 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. 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 OPA2325 a very good

successive-approximation register (SAR) analog-to-

digital converter (ADC) input driver amplifier. The low

offset, and 0.2-pA input bias current make this device

ideal for a wide range of precision applications with

high-impedance sensors. The unique feature of

interfacing to high-impedance sensors on the input

and being able to drive ADC inputs with very little

distortion make the OPA2325 suitable for various

data acquisition and process control applications.

In addition, the OPA2325 has a wide supply voltage

range from 2.2 V to 5.5 V with excellent power-supply

rejection ratio (PSRR) over the entire supply range,

making the device suitable for precision, low-power

applications that run directly from batteries without

regulation.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

OPA2325

SOIC (8)

3.91 mm × 4.90 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

The OPA2325 as an ADC Driver Amplifier