User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
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Reserved. Page 81 of 97
13. DAC and ADC Converter
13.1. DAC Converter
13.1.1. Description
Ball
GE864
Pin
GC864
Signal I/O Function
DAC Converter
C7 40
DAC_OUT AO Digital/Analog converter output
The GE/GC864-QUAD V2 AND GE864-GPSmodules provide one Digital
to Analog Converter.
The on board DAC is a 10-bit converter, able to generate an
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.