Hi,
I have two issues but perhaps related in that they involve reading from the device.
The first issue is that the CONFIG register doesn’t read-out. The READ_EN bit is set in a write to the configuration register but there is no reply, as shown below. (The write to the CONFIG register is successful as Vref can be setup and observed on pin 56. Vref can be changed from 2.5V to 3V.)
The second issue is that the A/D conversion codes returned are a factor of 2 from the input voltage.
i.e. with Vref at 2.5V
using a x4 range, a -5V to +5V input range is returned as -10V to +10V (voltage from code equivalent)
and using a x2 range, a -2.5V to +2.5V input range is returned as -5V to +5V (voltage from code equivalent)
Returned codes are saturated beyond these inputs. Although changing the scales shows that the ranges can be changed I expected that an x4 range would have accepted a -10V to +10V input and an x2 range would have accepted a -5V to +5V input.
(All dc voltages)
Regards,