User's Manual

GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 65 of 79
12. DAC and ADC section
12.1. DAC Converter
12.1.1. Description
The GL865 provides a Digital to Analog Converter. The signal
(named DAC_OUT) is available on pin 15 of the GL865.
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.