Description
WM5621L is a quadruple 8-bit digital to analogue converter (DAC) with buffered reference inputs (high impedance). The DAC produces an output voltage that ranges between either one or two times the reference voltage and GND. The DAC is monotonic. The device operates from a single supply in the range 2.7V to 5.5V. A power-on reset function is incorporated to provide repeatable start-up conditions. A global hardware shut-down terminal and the capacity to shut-down each individual DAC with software are provided to minimize power consumption.

Features
• Individual (or all) DAC's can be powered-down
• One low-power 8-bit voltage output DAC
• Three 8-bit voltage output DACs
• Fast serial interface (1 MHz max)
• Simple 2 or 3 wire interface
• Programmable for 1 or 2 times output range
• High impedance reference inputs for each DAC
• Simultaneous update facility
• Extended temperature range (-25oC to 85oC)
• Single supply operation, range 2.7 V to 5.5 V
• 0 to 4 V output (x2 output range) at 5 V VDD
• 0 to 2.5 V output (x2 output range) at 3 V VDD
• Low power specification:
All DACs on : 3.6 mW at 3.6 V typ
                 : 6 mW at 5 V typ
Low power DAC : 0.54 mW at 3.6V typ
All DAC's shutdown : 0.18 mW at 3.6V typ
• Guaranteed monotonic output

APPLICATIONs
• Mobile Communications
• Programmable d.c. voltage sources
• Digitally controlled attenuator/amplifier
• Signal synthesis
• Automatic test equipment