GE866-QUAD Hardware User Guide
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 64 of 82
Mod. 0805 2011-07 Rev.2
12.
DAC and ADC section
12.1.
DAC Converter
12.1.1.
Description
The GE866-QUAD provides a Digital to Analog Converter. The signal (named
DAC_OUT) is available on pin E4 of the GE866-QUAD.
The on board DAC is a 10 bit converter, able to generate an analogue value based on
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
1.8
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.
12.1.2.
Enabling DAC
An AT command is available to use the DAC function.
The command is: AT#DAC= [<enable> [, <value>]]
<value> - scale factor of the integrated output voltage (0..1023 - 10 bit precision)
it must be present if <enable>=1
Refer to SW User Guide or AT Commands Reference Guide for the full description of
this function.
NOTE:
