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?