Table of Contents
Advertisement
XPS-Q8 Controller
XPSDocumentation V1.4.x (EDH0301En1060 — 10/17)
20.5
Analog I/O (GPIO2 Connector)
20.5.1
Analog Inputs
The 4 analog inputs have a range of ±10 V, 14 Bit resolution, and a 15 kHz 2nd order
low pass filter.
In all cases, the analog input values must be within the ±10 V range. The analog input
impedance is typically 22 kΩ. The maximum input current is ±500 µA.
1 LSB = 20 V/16384 ≈ 1.22 mV
The maximum offset error is ±17.1 mV.
20.5.2
Analog Outputs
The 4 analog outputs have a range of ±10 V and 16 Bit resolution. The maximum offset
error is ±2 mV, and the maximum gain error is ±6 LSB. The output settling time is
typically 50 µsec at 1% of the target value (output filter is a 15 kHz 1st order low pass
filter).
Analog outputs are voltage outputs (output current less than 1 mA), so to use them
properly, they must be connected to an impedance higher than 10 kΩ.
1 LSB = 20 V/65536 ≈ 0.3 mV.
Analog outputs can be accessed via the GPIOAnalogSet(GPIO2.DACn,...) function.
208
Appendix
Advertisement
Table of Contents
