Voltage range and analog input pin handling of the ADAQ4224.

Question

Dear Analog Devices Support Team, 
 
 I hope this message finds you well. 
 
 I have a couple of questions regarding the voltage range and analog input pin handling of the ADAQ4224. 
 
 Question 1: VSSH Headroom 
 In the datasheet, the headroom requirement for VDDH is described on page 9. 
 However, I could not find a specific description regarding the required or recommended headroom for the VSSH pin. 
 Could you please advise the appropriate VSSH headroom for proper operation? 
 
 Question 2: Analog Input Pin Handling 
 For single-ended input operation, is it acceptable to connect the INN pin directly to GND? 
 Please let us know if there are any precautions or recommended configurations. 
 
 Thank you very much for your support. 
 I look forward to your guidance. 
 
 Best regards,

rrosario · Accepted Answer

Hi yoshibabababa735,

VSSH headroom should be 0.5V. Thanks for pointing this out, we will clarify this information on the next revision of the data sheet. 
 Yes, you can connect INN directly to ground for single-ended operation.

Best regards, 
 Rainier)

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Voltage range and analog input pin handling of the ADAQ4224.

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