For densely populated, thermally sensitive
instrumentation applications that
requires high-speed signal conditioning. Analog Devices’ single-channel 850-MHz
ADA4857 high-speed voltage feedback
op amp combines a number of desirable
features. It burns only 5 mA, less than
half that of other amps in its class. Also, it
reduces input noise to 4.4 nV/vHz, also
half that of competing amps. Its –91-dBc
distortion specification at 10 MHz gives it
a 10-dB improvement in that department.
Sampling now, full volume production
is scheduled for April. The chip comes in
3- by 3-mm chip-scale packaging and in
an eight-lead small-outline IC (SOIC).
A dual version comes in a slightly larger
(4- by 4-mm) package. The single version
costs $0.85 per unit, and the dual version
costs $1.39, both in quantities of 1000
units.
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