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.