1 Features
• Wide bandwidth:
– Gain-bandwidth product: 390 MHz
– Bandwidth (G = 1 V/V): 800 MHz
– Large-signal bandwidth (2 VPP): 245 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
• Low distortion (RL = 100 Ω, VO = 2 VPP):
– 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

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 fieldeffect
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.