AFE4400 alive or not

Abhishek Nair27

Other Parts Discussed in Thread: AFE4400, MSP430FR5969

Hi TI,

I am working with a custom board built around the MSP430FR5969 and the AFE4400. When I verified the voltages on the AFE4400 to check whether it was alive or not, I got the following values:

(1) Voltage between TX_REF/RX_ANA_GND (pins 3 and 9 of the AFE4400): Board 1 := 1.38 V, Board 2 := 3.2 V (expected voltage = 0.75 V).

(2) Voltage on VCM (pin 4 of the AFE4400): Board 1 := 0 V, Board 2:= 0 V (expected voltage = 0.9 V)

(3) Voltage on BG (pin 7 of the AFE4400): Board 1 := 0 V, Board 2 := 0 V (expected voltage = 1 V)

I wonder this is enough to comment whether the AFE4400 is dead or not.

Thanks,

Abhishek G Nair

over 10 years ago

0 Amy Schnoor over 10 years ago

TI__Mastermind 18285 points

Abhishek,

We have received your post and hope to have a response back to you soon.

0 Abhishek Nair27 over 10 years ago in reply to Amy Schnoor

Prodigy 220 points

Hi Amy,

Thanks for your response. I have, however, solved the problem.

The issue was that the AFE4400 pins RESETZ and AFE_PDNZ connected to GPIO pins of the MSP430FR5969 were not driven high in the microcontroller firmware. Doing so has given out the requisite voltages.

Thanks and Regards,
Abhishek G Nair.

0 Amy Schnoor over 10 years ago in reply to Abhishek Nair27

TI__Mastermind 18285 points

Abhishek,

Thank you for letting us know you resolved this issue and thank you for posting the resolution. Hopefully this helps someone else in the future.

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AFE4400 alive or not