AnsweredAssumed Answered

Unipolar input to Differential ADC

Question asked by lopez.zoni on Jun 27, 2018
Latest reply on Jun 27, 2018 by JinoL



I have a linear image sensor application where the output signal from the sensor is a unipolar signal ranging from 0-3V. I want to convert this signal into a differential signal for ADC (1.8V such as LTC2188). The input signal can be considered as a DC signal since I am sampling the charge accumulated on a capacitor. 


The problem I have seen in using FDA such as ADA4932 was that the output signal clips due to the input range being high. I cannot put a series capacitor eliminate the DC since my signal is actually a DC.


Are there any recommendations about how to interface the sensor and the differential ADC?