Our customer uses AD7768 evaluation board then ,
it is seemed that the result of ADC is not 2's complement but offset binary.
Output coding of AD7768 is 2's complement only in datasheet .
Is this software issue ?
Could you teach me how to set 2's complement ?
Attachment is its result ( input 0~0.5V)
He inputs 0~0.5V to Ain+ pin and GNS is connected to AIN- pin.
Analog voltage is correct but LSB is not correct.
MAX: 0.49V , 9400273LSB
MIN: 0.001V, 8.3908 E+6
Pk-Pk: 0.49V, 1009469LSB ( about 490nV/LSB and this value is correct)
another attached file input 0 ~-0.5 V is input 0~0.5V to AIN-pin and GND to AIN+pin.
Register is not changed and remains default setting ( check AIN1 only).