Elton User Manual Rev 1.04
Page 51
Analog Outputs
Analog Output sensors convert digital values into analog voltages or current signals that can be analyzed
and controlled.
A single-ended output is a signal that is always referenced to the shield -which is typically earth Ground, on
the output connector. The voltage should be measured in proportion to the analog Ground pins.
The two analog outputs feature a 12-bit resolution and single-ended 0-3.3V output range.
Analog Output
No. of Channels
3 Single-Ended
Resolution
0x00112-bits (1 part in 4096) Native
Output Voltage Range
0-3.3V
Maximum Current
NOTE
: Do not use the digital Ground pins for analog output measurements since it has a higher noise-
level and will result in poor quality output voltage signals.
The 12-bit resolution refers to the output of the requested voltage in 12-bit integers with an accuracy of 3.3V
/ 4096 or approximately 0.81mV. The conversion formulas between D/A code and output voltage shown
below are based on the ideal case scenario.
D/A Conversion Formulas
D/A code = desired output voltage / 3.3V x 4096 (min value 0, max value 4095)
Output voltage = D/A code / 4096 x 3.3V
The following table uses specific data for input voltage and A/D values based on the ideal case scenario.
NOTE
: Based on convention, the top end of the range (3.3V) must correspond to a code of 4096, which
requires 13-bits. Therefore, the maximum D/A code of 4095 corresponds to 1 LSB less than 3.3V
as shown in the table below.
D/A code Hex
D/A code Dec
Output voltage
0x000
0
0.0000V
0x001
1
0.0008V
0x002
2
0.0016V
0x7FF
2047
1.6592
0x800
2048
1.6500V
0x801
2049
1.6508V
0xFFE
4094
3.2984
0xFFF
4095
3.2992V
