1FEATURES
2• UNITY-GAIN BANDWIDTH: 400MHz
• GAIN-BANDWIDTH PRODUCT: 200MHz
• LOW INPUT VOLTAGE NOISE: 2.6nV/√Hz
• VERY LOW DISTORTION: –93dBc (5MHz)
• HIGH OPEN-LOOP GAIN: 110dB
• FAST 12-BIT SETTLING: 22ns (0.01%)
• LOW DC VOLTAGE OFFSET: 300mV Typical
• PROFESSIONAL LEVEL DIFF GAIN/PHASE
ERROR: 0.003%/0.008°

APPLICATIONS
• ADC/DAC BUFFER DRIVER
• LOW DISTORTION IF AMPLIFIER
• ACTIVE FILTER CONFIGURATION
• LOW-NOISE DIFFERENTIAL RECEIVER
• HIGH-RESOLUTION IMAGING
• TEST INSTRUMENTATION
• PROFESSIONAL AUDIO
• OPA642 UPGRADE

DESCRIPTION
The OPA842 provides a level of speed and dynamic
range previously unattainable in a monolithic op amp.
Using unity-gain stable, voltage-feedback architecture
with two internal gain stages, the OPA842 achieves
exceptionally low harmonic distortion over a wide
frequency range. The classic differential input
provides all the familiar benefits of precision op amps,
such as bias current cancellation and very low
inverting current noise compared with wideband
current differential gain/phase performance,
low-voltage noise, and high output current drive make
the OPA842 ideal for most high dynamic range
applications.
Unity-gain stability makes the OPA842 particularly
suitable for low-gain differential amplifiers,
transimpedance amplifiers, gain of +2 video line
drivers, wideband integrators, and low-distortion analog-to-digital converter (ADC) buffers. Where
higher gain or even lower harmonic distortion is
required, consider the OPA843—a higher-gain
bandwidth and lower-noise version of the OPA842.