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GE864 Hardware User Guide
1vv0300694 Rev.10 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 55 of 69
11 DAC and ADC section
11.1 DAC Converter
11.1.1 Description
The GE864-QUAD / PY module provides a Digital to Analog Converter. The signal (named
DAC_OUT) is available on BGA Ball C7 of the GE864-QUAD / PY module and on pin 17 of PL102 on
EVK2 Board (CS1152).
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.