Hi Sadoun, You care correct. REFP0 (pin 9) should connect to your excitation + and REFPN (pin 8) should connect to your excitation -. You would connect your first bridge to AIN0 (pin 11) and AIN1 (pin 10) and your second bridge to AIN2 (pin 7) and AIN1 (pin 6). These are all inputs and none of them are outputs. These pins when floating could be at any voltage, but they have no driving strength. AIN3 (pin 6) does also have a low-side switch to AVSS, but by default this switch is open. If you see a low Ohm connection between pin 9 and AVSS, then it is possible the device was damaged in some way. Best regards, Bob B
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