2.7-GHz, 13-V, decompensated 7-V/V, FET-input operational amplifier

The OPA818 is a decompensated,

voltage-feedback operational amplifier for high-speed and

wide-dynamic-range applications. The OPA818 has a low-noise JFET input stage that combines high

gain-bandwidth with a wide supply range from 6V to 13V. The

fast slew rate (1400V/µs) provides high, large-signal

bandwidth and low distortion. This amplifier is manufactured

using TI’s proprietary, high-speed, silicon-germanium (SiGe)

process to achieve significant performance improvements over

other high-speed, FET-input amplifiers.

The OPA818 is an extremely versatile,

wideband TIA photodiode amp for use in optical test and

communication equipment, and many medical, scientific, and

industrial instruments. The OPA818

showcases a 2.7GHz GBWP, low 2.4pF total input capacitance,

and 2.2nV/√Hz input noise. The OPA818

achieves over 85MHz signal bandwidth in a TIA configuration

with 20kΩ TIA gain (RF) and 0.5pF photodiode

capacitance (CD) with wide output swings. The

low-noise architecture with picoampere of input bias current

is also an excellent choice for test and measurement

applications. Though typically stable in gains ≥ 7V/V, the

OPA818 is designed for use in

applications with lower gains by applying noise-gain shaping

techniques.

The OPA818 is available in an 5-pin

SOT-23 package and an 8-lead WSON package with an exposed

thermal pad for heat dissipation. This device is specified

for operation over the industrial temperature range of –40°C

to +85°C.