The AD8138 is a major advancement over op amps for differential
signal processing. The AD8138 can be used as a single-ended-
to-differential amplifier or as a differential-to-differential
amplifier. The AD8138 is as easy to use as an op amp, and
greatly simplifies differential signal amplification and driving.
Manufactured on ADI’s proprietary XFCB bipolar process, the
AD8138 has a –3 dB bandwidth of 320 MHz and delivers a
differential signal with the lowest harmonic distortion available
in a differential amplifier. The AD8138 has a unique internal
feedback feature that provides balanced output gain and phase
matching, suppressing even order harmonics. The internal feed-
back circuit also minimizes any gain error that would be associated
with the mismatches in the external gain setting resistors.