Ultrahigh Speed IC D/A Converter

The Analog Devices AD9768SD D/A converter is a monolithic current-output converter

which can accept 8 bits of ECL-level digital input voltages and convert them into analog signals

at update rates as high as 100MSPS. In addition to its use as a standard D/A converter,

it can also be utilized as a two-quadrant multiplying D/A at multiplying bandwidths as high

as 40MHz.

An inherently low glitch design is used, and the complementary current outputs are suitable

for driving transmission lines directly. Nominal full-scale output is 20mA, which corresponds

to a 1-volt drop across a 50 Ohm load, or ±1 volt across 100 Ohm returned to +1volt.

The actual output current is determined by the on-chip reference voltage

(VREF-1.26V) and an external current setting resistor, RSET.