WM5620

Supply Voltage (VDD - VGND) . . . . . . . . . . . . . +7V
Digital Inputs . . . . . . . . . GND - 0.3 V, VDD + 0.3 V
Reference inputs . .  . . . .GND - 0.3 V, VDD + 0.3 V
Operating temperature nge, TA. . .. TMIN to TMAX
WM5620_C_ . . . . . . . . . . . . .  . . . . 0oC to +70oC
WM5620_I_ . . . . . . . . . ... . . . . . -40oC to +85oC
Storage Temperature_ . .  . .  . -50oC to +150oC
Lead Temperature 1.6mm (1/16 inch) from case
(soldering, 10 sec) . . . . .  . . . . . . . . . . + 260oC

WM5620L and WM5620 are quad 8-bit digital to analogueconverters (DAC) controlled via a serial interface. EachDAC's output voltage range isprogrammable for either x1or x 2 its reference input voltage, allowing near rail to railoperation for the x 2 output range. Separate highimpedance buffered voltage reference inputs are providedfor each DAC. WM5620L operates on a single supplyvoltage of 3 V while WM5620 operates on 5 V.

WM5620/L interfaces to all popular microcontrollers andmicroprocessors via a three wire serial interface with CMOScompatible, schmitt trigger, digital inputs. An 11 bitcommand word comprises 2 DAC select bits, an outputrange selection bit and 8-bits of data.

Individual or all DAC outputs are changed using WM5620/L's double buffered DAC registers and the separate LOADand LDAC inputs. DAC outputs are updatedsimultaneously by writing a complete set of new valuesand then pulsing the LDAC input.

The DAC outputs are optimised for single supplyoperation and driving ground referenced loads.An internal power-on-reset function sets the DAC's inputcodes to zero at power up.

Ideal in space critical applications WM5620/L is availablein small outline and DIP packages for commercial (0oC to70oC) and industrial (-40oC to 85oC) temperature ranges.