Datasheet

30
DIFFERENTIAL AMPLIFIERS
The DA1855A is a stand-alone, high-
performance 100 MHz differential
amplier. It is intended to act as a
signal conditioning preamplier for
oscilloscopes, digitizers and spectrum
analyzers, providing differential
measurement capability to instruments
having only a single-ended input. When
used with a DA1855A, oscilloscopes
can obtain Common Mode Rejection
Ratio (CMRR) and overdrive recovery
performance levels previously
unobtainable.
Amplier gain can be set to 1 or
10 A built-in input attenuator can be
separately set to attenuate signals by
a factor of 10, providing gains of 10,
1, or 0.1 and common mode dynamic
range of ±15.5 V (÷1) or ±155 V (÷10).
Optional probes increase the maximum
input signal and common mode ranges
in proportion to their attenuation ratio
but do not exceed their maximum input
voltage rating. Effective gain of the
DA1855A, including probe attenuation,
amplier gain and attenuator settings, is
automatically displayed.
The DA1855A features a built-in
Precision Voltage Generator (PVG) that
can be set to any voltage between
±15.5 V (±10 V in Differential Offset)
with up to 100 µV resolution. The PVG’s
output can be selected as an input to
the inverting (-) input of the amplier for
operation as a differential comparator,
or applied internally as a true
differential offset voltage independent
of oscilloscope offset. The differential
amplier is also available in a 2 channel
model. In addition, a rackmount is
available for each model for easy
installation with other instruments.
Teledyne LeCroy
Differential Amplier
and Accessory
Model Numbers:
DA1855A
DA1855-PR2
DA1855A-RM
DA1855A-PR2-RM
DXC5100
DXC100A
DXC200
DA101
DA1855A