The DA1855A (1 channel) and DA1855A-PR2 (2 channels) are stand-alone, high-performance 100MHz differential amplifiers. They act as signal conditioning preamplifiers 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. The DA1855A has a bandwidth of 100MHz but any one of the three 3-pole bandwidth limit filters can be selected to reduce bandwidth to 20MHz, 1MHz or 100kHz to limit noise above the frequency of interest.

Full control from oscilloscope through ProBus interface
DC to 100MHz bandwidth
Outstanding 100,000: 1 Common Mode Rejection Ratio (CMRR)
Gain of X1 or X10
Industry-leading overdrive recovery
Low noise
Selectable BW limiting
Two gain control modes when connected to a LeCroy oscilloscope
Built-in Precision Voltage Generator (PVG)
Comparator and true differential offset modes