3Si Security Systems Inc. GT83000A Benutzerhandbuch
GE865 Hardware User Guide
1vv0300799 Rev.15– 2012-04-23
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 59 of 77
12.
DAC and ADC section
12.1.
DAC Converter
12.1.1.
Description
The GE865 provides a Digital to Analog Converter. The signal (named DAC_OUT) is available
on BGA Ball G7 of the GE865 and on pin 17 of PL102 on GE865 Interface Board (CS1324).
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
on BGA Ball G7 of the GE865 and on pin 17 of PL102 on GE865 Interface Board (CS1324).
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.