Analog Devices has a digitally programmable variable gain amplifier with transmit driver for transmitting signals over power lines, cables, and other applications with low impedance.

The AD8260 operates on a single 3.3V supply and has a transmit driver that produces +/-200mA output up to 100kHz, and greater than +/-100mA above that frequency.  It operates at -3dB bandwidth of 200MHz and includes a 30dB gain range digitally adjustable in 3dB gain steps providing the headroom needed for losses introduced in various cabling systems.

The VGA features 2.4nV/[root]Hz input voltage noise and driver with a built-in gain of 1.5, which is suitable for converting the differential output signals of DACs to a voltage that can directly drive very low impedances.

The AD8260 preamplifier is user-configurable with external resistors for gains greater than 6 dB.
The driver is set-up to be driven by modern current output DACs, like the high-speed AD9742 12 bit, 3.3 V supply DAC.

It is available in a 32-Lead LFCSP (lead-frame chip-scale package) over the extended industrial temperature range -40 to 105 deg C.

See www.analog.com