User's Manual

GE865 Hardware User Guide
1vv0300799 Rev.6 - 04/06/09
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12 DAC and ADC section
12.1 DAC Converter
12.1.1 Description
The GE865 module provides a Digital to Analog Converter. The signal (named DAC_OUT) is available
on BGA Ball G7 of the GE865 module and on pin 17 of PL102 on EVK2 Board (CS1324).
The on board DAC is a 10 bit converter, able to generate a analogue value based a specific input in
the range from 0 up to 1023. However, an external low-pass filter is necessary
Min
Max
Units
Voltage range (filtered) 0 2,6 Volt
Range 0 1023 Steps
The precision is 10 bits so, if we consider that the maximum voltage is 2V, the integrated voltage could
be calculated with the following formula:
Integrated output voltage = 2 * value / 1023
DAC_OUT line must be integrated (for example with a low band pass filter) in order to obtain an
analog voltage.