ADC09QJ1300: Full Scale Range Adjust FS_RANGE does not work

also, if you simply change the gain/Full Scale setting, the ADC data becomes noisy.

one needs to initiate a (re)calibration (i was not running the background cal to save power and avoid the glitch that it causes) to get the ADC to produce clean signals.

this is also not mentioned in the documentation.

regards,

joseph

Hi Joseph,

Here is where this is indicated in the datasheet.

We indicate that the LSB byte at the lowest address.

9.5.4 SDI

Each register access requires a specific 24-bit pattern at this input. This pattern consists of a read-and-write

(R/W) bit, register address, and register value. The data are shifted in MSB first and multi-byte registers are

always in little-endian format (least significant byte stored at the lowest address).

Regards,

Rob

yes. true. i missed it. thanks.