• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 46 subscribers
  • Views 215 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AFE4403 sign of life

Jeff Bondy
Prodigy 110 points
Other Parts Discussed in Thread: AFE4403

Hi,

I don't get the sign-of-life voltages or the 4 MHz clock out from our AFE4403. I have 3.3V applied to RX_ANA_SUP, RX_DIG_SUP, and 5V applied to TX_CTRL_SUP and LED_DRV_SUP. I also have AFE_PDNZ and RESETZ pulled high through a 10K to 3.3V. I have a clean 8 MHz going into Xin, Xout is floating. Grounds are all common. There is a 2.2 uF at TX_REF and BG.

I read 5 V at TX_REF

0V at BG

nothing on clock out

nothing in TXN/TXP

Did I break my part? I'm a little leery about 0V at BG and 5V at TX_REF. I guess I'd like to know if this is a known state and I'm missing something or if I'm mishandling the parts in some way. I'd like to know minimum sign-of-life. If I put in 3.3V RX_DIG_SUP and a 8 MHz clock will I get something out of CLKOUT? What inputs/power can control TX_REF or BG?

thanks,

j