1 Features

• Wide power-supply range: 8V to 85V

• High output current: 350mA

• Low noise: 6nV/√Hz at 10kHz

• Wide bandwidth: 10MHz GBW

• High slew rate: 40V/μs

• Low offset voltage: ±50μV

• Low offset voltage drift: ±1μV/°C

• Rail-to-rail output

• Disable function

• Quiescent current:

Enabled: 3.25mA

Disabled: 250μA

• Overtemperature and overcurrent flags

• Temperature range: –40°C to +125°C

• For higher dc precision see the OPA593

2 Applications

• Semiconductor test

• LCD test

• Programmable DC power supply

• CT and PET scanner

3 Description

The OPA598 is a high-voltage (85V), highoutput-

current (350mA), unity-gain-stable operational

amplifier with a high bandwidth (10MHz).

The OPA598 power amplifier combines low offset

voltage (50μV) and offset voltage drift (1μV/°C) with

additional features, including a programmable current

limit and overcurrent flags. The OPA598 features

mux-friendly inputs that enable differential input

voltage range to the supply rails and help improve

settling performance in multichannel systems.

The programmable current limit can be set with an

external resistor or voltage source to limit the output

current and protect downstream devices. In case

of an overcurrent or overtemperature condition, the

device indicates erroneous operation through a status

flag. An included disable feature is used to shut down

the device, saving power and placing the output into a

high-impedance state.

The device is unity-gain stable, enabling operation as

a high-impedance buffer, while the wide bandwidth

and high slew enable high signal gains. The high

output current and capacitive drive allow the device

to drive external field-effect transistors (FETs) used to

provide higher system currents, such as in a digital

power supply.

If higher dc precision is required then the OPA593 can

be used as a direct replacement.