Telit Wireless Solutions HE910-EU V2, Hardware User'S Manual

Page: 56 / 78

The HE910 V2 module provides a Digital to Analog Converter. The signal (named
DAC_OUT) is available on pin C13 of the HE910 V2 module and on pin 6 of PL302 on
Interface Board (CS1467D).
The on board DAC is in the range from 0 to 1023. However, an external low-pass filter is
necessary.
Parameter Min Max Units
Voltage range (filtered) 0 1.8 Volt
Range
0 1023 Steps
The precision is 1023 steps, so since 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.
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:
The DAC frequency is selected internally. D/A converter must not be used during
POWERSAVING.