User's Manual
GE865 Hardware User Guide
1vv0300799 Rev.11 – 13-07-2010
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12 DAC and ADC section
12.1 DAC Converter
12.1.1 Description
The GE865 provides a Digital to Analog Converter. The signal (named DAC_OUT) is
available on BGA Ball G7 of the GE865 and on pin 17 of PL102 on GE865 Interface 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.