Functions of the board
APCI-3xxx
38
8.3
Analog outputs
There are 4 analog output channels with a resolution of 12-bit and a
precision of 11-bit on the
APCI-3100, APCI-3106
and
APCI-3500.
The analog outputs are updated by 32-bit writing on the I/O addresses. The
status bit (DAC Ready) indicates if the analog outputs are ready for a new
update.
The time ("Time to ready"; see Fig. 8-4) between the writing on the I/O
addresses (DAC register) and the update of the analog outputs is 5 µs.
Further accesses to the DAC register will not be considered in this period.
The time between writing in the software command and reaching the set
value for the analog outputs is 15 µs (settling time).
Fig. 8-4: Reaction time of the analog outputs
After the Power-ON reset of the OC the analog outputs are set to voltage
value of 0 V.
Switch of the analog ground lines (voltage version)