WM5620

WM5620L, WM5620 Production Data Sept. 1996 Rev 2 3 & 5V Quad 8-Bit Voltage Output DAC with Serial Interface Description WM5620L and WM5620 are quad 8-bit digital to analogue converters (DAC) controlled via a serial interface. Each DAC's output voltage range isprogrammable for either x1 or x 2 its reference input voltage, allowing near rail to rail operation for the x 2 output range. Separate high impedance buffered voltage reference inputs are provided for each DAC. WM5620L operates on a single supply voltage of 3 V while WM5620 operates on 5 V. WM5620/L interfaces to all popular microcontrollers and microprocessors via a three wire serial interface with CMOS compatible, schmitt trigger, digital inputs. An 11 bit command word comprises 2 DAC select bits, an output range 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 LOAD and LDAC inputs. DAC outputs are updated simultaneously by writing a complete set of new values and then pulsing the LDAC input. The DAC outputs are optimised for single supply operation and driving ground referenced loads. An internal power-on-reset function sets the DAC's input codes to zero at power up. Ideal in space critical applications WM5620/L is available in small outline and DIP packages for commercial (0oC to 70oC) and industrial (-40oC to 85oC) temperature ranges. Features Four 8-bit voltage output DAC's Three wire serial interface Program...