1 Features

• Gain-bandwidth product: 70MHz

• Small-signal bandwidth: 140MHz

• Slew rate: 200V/μs

• Wide supply range: 4.75V to 27V

• Low noise:

– Input voltage noise: 6.3nV/√Hz (f = 500kHz)

– Input current noise: 5fA/√Hz (f = 10kHz)

• Rail-to-rail input and output:

– FET input stage: 2pA input bias current (typical)

– High linear output current: 75mA

• Input offset: ±500μV (maximum)

• Offset drift: ±2.5μV/°C (typical)

• Low power: 3.7mA/channel

• Extended temperature range: –40°C to +125°C

• Dual-channel version: OPA2810

2 Applications

• Wideband photodiode transimpedance amplifier

• Analog input and output module

• Impedance measurement

• Power analyzer

• High-Z voltage and current measurement

• Data acquisition

• Multichannel sensor interfaces

• Optoelectronic drivers

3 Description

The OPA810 is a single-channel, field-effect transistor

(FET) input, voltage-feedback operational amplifier

with bias current in the picoampere (pA) range.

The OPA810 is unity-gain stable with a small-signal,

unity-gain bandwidth of 140MHz, and offers excellent

dc precision and dynamic ac performance at a

low quiescent current (IQ) of 3.7mA per channel.

The OPA810 is fabricated on Texas Instruments'

proprietary, high-speed SiGe BiCMOS process and

achieves significant performance improvements over

comparable FET-input amplifiers at similar levels

of quiescent power. With a gain-bandwidth product

(GBWP) of 70MHz, slew rate of 200V/μs, and lownoise

voltage of 6.3nV/√Hz, the OPA810 is designed

for use in a wide range of high-fidelity data-acquisition

and signal-processing applications.

The OPA810 features rail-to-rail inputs and outputs,

and delivers 75mA of linear output current designed to

drive optoelectronic components and analog-to-digital

converter (ADC) inputs or buffer digital-to-analog

converter (DAC) outputs into heavy loads.

The OPA810 is specified over the extended industrial

temperature range of –40°C to +125°C. The OPA2810

is a dual-channel variant of the OPA810, available in

8-pin SOIC, SOT-23, and VSSOP packages.