OPA817 800-MHz, High-Precision, Unity-Gain Stable, FET-Input Operational Amplifier

1 Features

• Wide bandwidth:

– Gain-bandwidth product: 390 MHz

– Bandwidth (G = 1 V/V): 800 MHz

– Slew rate: 970 V/µs

• High precision:

– Input offset voltage: 250 μV (maximum)

– Input offset voltage drift: 4 μV/°C (maximum)

• Input voltage noise: 4.5 nV/√Hz

• Input bias current: 4 pA

– HD2, HD3 at 10 MHz: –86 dBc, –99 dBc

• Supply range: 6 V to 12.6 V

• Supply current: 23.5 mA

• Shutdown current: 55 µA

• Performance upgrade to OPA656

2 Applications

• High-speed data acquisition (DAQ)

• Active probes

• Oscilloscopes

• Wideband transimpedance amplifiers (TIAs)

• Wafer scanning equipment

• Optical communication modules

• Optical time-domain reflectometry (OTDR)

• Test and measurement front-ends

• Medical and chemical analyzers

.

.

.

.

.

.

.

+

–

ADC

+

–

+5 V

5 V

OPA817

Input

THS4541

ADS4149

High Input Impedance Digitizer Front-End

3 Description

The OPA817 is a unity-gain stable, voltage-feedback

operational amplifier for high-speed, high-precision

and wide dynamic range applications.

The OPA817 has a low-noise junction gate field-

effect transistor (JFET) input stage that features

a wide gain-bandwidth of 390-MHz and a supply

range from 6-V to 12.6-V. The fast slew rate of 970-

V/µs allows a wide large-signal bandwidth and low

distortion when used as high impedance buffer in

high-speed digitizers, active probes and other test and

measurement applications.

The OPA817 offers extremely low input offset voltage

of ±250-μV and offset voltage drift of ±4-μV/°C. The

combination of pico-amperes of input bias current

and low input voltage noise (4.5-nV/√Hz) makes the

OPA817 an ideal wideband transimpedance amplifier

in optical test and communication equipment as well

as medical and scientific instrumentation.

The OPA817 is available in an 8-lead WSON package

with an exposed thermal pad for heat dissipation.

This device is specified to operate over the industrial

temperature range of –40°C to +105°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

OPA817

WSON (8)

3.00 mm × 3.00 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

.

.

.

Large-Signal Frequency Response

OPA817

SBOS847 – JULY 2022

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. ADVANCE INFORMATION for preproduction products; subject to change

without notice.