features

High Linearity Near Limiting

Fast Recovery from Overdrive: 2.4 ns

IiMiting Voltage Accuracy: ±15 mV

−3dB Bandwidth (G = +1): 450 MHz

Slew Rate: 1000 V/μs

±5-V and 5-V Supply Operation

Unity Gain Version of the OPA689

IF Limiting Amplifiers

AM Signal Generation

Non−Linear Analog Signal Processing

High Speed Comparators

applications

Fast Limiting ADC Input Buffers

CCD Pixel Clock Stripping

Video Sync Stripping

HF Mixers

description

The OPA688 is a wideband, unity gain stable voltage-feedback op amp that offers bipolar output voltage limiting.

Two buffered limiting voltages take control of the output when it attempts to drive beyond these limits. This new

output limiting architecture holds the limiter offset error to ±15 mV. The op amp operates linearly to within

30 mV of the output limit voltages.

The combination of narrow nonlinear range and low limiting offset allows the limiting voltages to be set within

100 mV of the desired linear output range. A fast 2.4-ns recovery from limiting ensures that overdrive signals

will be transparent to the signal channel. Implementing the limiting function at the output, as opposed to the

input, gives the specified limiting accuracy for any gain, and allows the OPA688 to be used in all standard op

amp applications.

Non-linear analog signal processing will benefit from the OPA688s sharp transition from linear operation to

output limiting. The quick recovery time supports high-speed applications.

The OPA688M is available in an industry standard pinout CDIP-8 package. For higher gain, or transimpedance

applications requiring output limiting with fast recovery, consider the OPA689M.