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PGA460: Need to purchase a PGA460 Daughter Card alone

Kevin Abishek
Prodigy 160 points
Part Number: PGA460
Other Parts Discussed in Thread: ENERGIA,

Hey Akeem,

I have been using the PGA460 EVM for a long time. It has been working well until a few days ago when I made the following changes to the daughter card:

1. Soldering the transformer driven transducer directly to the daughter card (eliminating the connector in between)

2. Desoldering the 6 pin male header and soldering wires directly to the pads

For the same settings on Energia's GetDistance code, the same setup doesn't seem to work and returns junk values. Isolating the transducer from the horn doesn't make any difference. I think the issue might have to do with damaged components while desoldering (at 460 deg Celsius) or the wires connecting the daughter card to the EVM being too long. 

Assuming the worst case scenario of a completely damaged daughter card, I'd like to purchase just that alone. 

  • 0
    TI__Mastermind 27950 points
    Hi Kevin,

    Unfortunately, we do not sell the BOOSTXL-PGA460 daughtercard alone. However, I have made the daughtercard's design output files available on the Ultrasonic E2E FAQ ( e2e.ti.com/.../3607.everything-you-need-to-know-for-ultrasonic-tof-air-coupled-collateral-tools-designs-faq ) for you to have additional boards fabricated. See the following download:
    e2e.ti.com/.../boostxl_2D00_pga460_5F00_daughtercard.zip

    I am curious as the why you made the solder modifications in the first place? Did you make a change to a net connection, or are the net connections all the same and now fixed rather than modular?

    Can you oscilloscope probe the OUTA/B pins, the transducer's positive terminal, and the INP pin to check if there is activity at all these points? This debug will help determine where the solder/connection fault may be.
  • 0 in reply to Akeem Whitehead
    Prodigy 160 points

    Thank you, I will take a look at the design files.

    The first one was a repair job. The transducer leads were accidentally yanked off the crimp connectors during a routine casing disassembly procedure. 

    The second one was to replace the male headers with a relimate connector. Needed to connect the daughter card to the EVM placed about 30 cms away. What temperature of the solder iron do you recommend I use to melt down the solder holding the male headers in place?

    Yes. I will try connecting the oscilloscope leads to the pins. I will get back to you with a picture of the output.

  • 0 in reply to Kevin Abishek
    TI__Mastermind 27950 points
    Hi Kevin,
    I typically use a solder iron at 350-400°C when reworking the PGA460 EVM hardware. You must be cautious when reworking the transducer, as the transducer can become damaged if exposed to a high/solder temperature for extended durations.