User's Manual

GE864
GE864GE864
GE864-
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-QUAD Automotive V2 Hardware User Guide
QUAD Automotive V2 Hardware User GuideQUAD Automotive V2 Hardware User Guide
QUAD Automotive V2 Hardware User Guide
1vv0300840 Rev.3 2010-04-08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 55 of 71
12. DAC and ADC section
12.1.
12.1.12.1.
12.1. DAC Converter
DAC ConverterDAC Converter
DAC Converter
12.1.1.
12.1.1.12.1.1.
12.1.1. Description
DescriptionDescription
Description
The GE864-QUAD Automotive V2 module provides a Digital to Analog Converter. The
signal (named DAC_OUT) is available on BGA Ball C7 of the GE864-QUAD Automotive V2
module and on pin 17 of PL102 on EVK2 Board (CS1302).
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
MinMin
Min Max
MaxMax
Max Units
UnitsUnits
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
Integrated output voltage = 2 * value / 1023Integrated output voltage = 2 * value / 1023
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.