TFP401A-Q1: Analog input common mode voltage range issue

Jeff Xie

Part Number: TFP401A-Q1

Hi team,

Customer tested two input, one has a common mode level of 2.91V measured at the TFP401 input, and another has a common mode level of 3.05V measured at the TFP401 input, 
and AVDD = 3.3V.

1. What is the risk when common mode resonance does not meet the chip requirements? What are the undesirable consequences?
2. What is the probability of risk?
3. Does the chip have an interface to adjust the common mode?
4. Could customer adjust the AVDD to 3.0V? Thanks.

over 4 years ago

0 Ikechukwu Anyiam over 4 years ago

TI__Mastermind 35130 points

Hi Jeff,

1. The risk is the device not operating as intended, as is the case when operating outside of datasheet specifications for all specs

2. This has not been quantified

3. The chip does not have an interface to adjust the common mode

4. Yes, as 3V is within datasheet specifications

Regards,

I.K.

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TFP401A-Q1: Analog input common mode voltage range issue