MN1941WEN Input / Output 4-3
4.2 Analog I/O
The NextMove e100 provides:
Two 12-bit resolution analog inputs.
Four 12-bit resolution analog outputs.
4.2.1 Analog inputs
The analog inputs are available on connector X12, pins 1 & 2 (AIN0) and 4 & 5 (AIN1).
Differential inputs.
Voltage range: ±10 V.
Resolution: 12-bit with sign.
Input impedance: 120 kΩ.
Sampling frequency: 4 kHz maximum, 2 kHz if both inputs are enabled.
The analog inputs pass through a differential buffer and second order low-pass filter with a
cut-off frequency of approximately 1 kHz.
Both inputs are normally sampled at 2 kHz. However, an input can be disabled by setting
ADCMODE to 4 (_acOFF). With one input disabled, the remaining input will be sampled at
4 kHz. In Mint, analog inputs can be read using the ADC keyword. See the Mint help file for
full details of ADC, ADCMODE and other related ADC... keywords.
Figure 2: Analog input, AIN0 shown
For differential inputs connect input lines to AIN+ and AIN-. Leave AGND unconnected.
-
+
-
+
2
3
1
+15 V
-15 V
‘X12’
NextMove e100
AIN0-
AIN0+
AGND
Mint
ADC.(0)