Hi,

I'm trying to configure AD7124-4 to read from a RTD.

I've set my registers as follow:

ADC_CONTROL(0x01) = 0x1080

IO_CONTROL_1(0x03) = 0x0024BA

CHANNEL_0(0x09) = 0x8043

CONFIG_0(0x19) = 0x9EC

If i set a 100 ohm resistance i read from the data register the value "8A0C2A"

If i convert the value in ohm using the formula described in the document *"Completely Integrated 3-Wire RTD Measurement System Using a Low Power,Precision, 24-Bit Sigma-Delta ADC" i obtain a value of 25 ohm.*

*If i set a 200 ohm value i obtain a value of 50 ohm, every time 1/4 of the set resistance.*

*I have forgot to set some configuration in the register?*

Hi,

Can I have also your schematic diagram? Can you also check or probe the voltage across the reference resistors? as well as the RTD equivalent resistor?

Thanks,

Jellenie