Specifications

WA_DEV_FEX20_PTS_004 Rev 001 June 30, 2010 35
Expansion Card Product Technical
Specification
Signals and Indicators
Table 31: Electrical Characteristics of the Analog to Digital Converter
Parameter
Minimum
Typical
Maximum
Unit
Resolution
10
bits
Sampling rate
138*
sps
Input signal range
0
2
V
INL (Integral non linearity)
15
mV
DNL (Differential non linearity)
2.5
mV
Input impedance
AUX-ADC
1M

* Sampling rate only for AUX-ADC and Sierra Wireless Software Suite application
5.6. Digital to Analog Converter
One Digital to Analog Converter output is available from the Expansion Card. The converter is an 8-bit
resolution DAC ranging from 0 to 2V.
5.6.1. Pin Description
Refer to the following table for the pin description of the digital to analog converter.
Table 32: Digital to Analog Pin Description
Pin Number
Signal
I/O
I/O Type
Description
40
AUX-DAC
O
Analog
D/A converter
Note: This output assumes a typical external load of 2kΩ and 50pF in parallel to GND.
5.6.2. Electrical Characteristics
Refer to the following table for the electrical characteristics of the digital to analog converter.
Table 33: Electrical Characteristics of the Digital to Analog Converter
Parameter
Minimum
Typical
Maximum
Unit
Resolution
8
bits
Output signal range
0
2.3
V
Output voltage after reset
1.147
V
INL (Integral non linearity)
-5
+5
LSB
DNL (Differential non linearity)
-1
+1
LSB