The AD8260 includes a high current driver, usable as a
transmitter, and a low noise digitally programmable variable
gain amplifier (DGA), useable as a receiver. The receiver section consists of a single-ended input preampli-
fier, and linear-in-dB, differential-output DGA. The receiver has a small signal –3 dB bandwidth of 230 MHz; the driver small
signal bandwidth is 195 MHz. The driver delivers ±300 mA,
well suited for driving low impedance loads, even when connected to a 3.3 V supply. The AD8260 DGA is ideal for trim applications and has a gain
span of 30 dB, in 3 dB steps. Excellent bandwidth uniformity is maintained across the entire frequency range. The low output-
referred noise of the DGA is advantageous in driving high speed ADCs. The differential output facilitates the interface to modern low voltage high speed ADCs. Single-supply and dual-supply operation makes the part versatile and enables gain control of negative-going pulses, such as those
generated by photodiodes or photo-multiplier tubes, as well as processing band-pass signals on a single supply. For maximum