Two capacitive input for AD7747

Question

I need two capacitive input for my application in using AD7747 for grounded sensing. The AD7747 only has one input and I wander if I can use the AD7746 instead. However, I'm unable to shield my setup well enough for floating sensing using AD7746 which makes it unsuitable for my application. 
 Is there a way I can use the AD7746 for grounded sensing perhaps by connecting the excitation pins to the input pins? 
 Or is there another device used for grounded sensor (similar to the AD7747) that has two capacitive input? 
 Thanks for your support!

ADIApproved · Accepted Answer

Hello Idowu, 
 The AD7746 cannot be used for single electrode sensing; shorting the Excitation pins to the CIN pins will saturate the readings of the sensor. 
 The AD7747 is the only single ended device in this family, but you could look at the CapTouch family: AD7143, AD7148, AD7147/A, AD7142. 
 Regards, 
 Sean)

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Two capacitive input for AD7747