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PCM1840EVM: PCM1840EVM

Mike Robinson
Prodigy 30 points
Part Number: PCM1840EVM

Tool/software:

We have a customer who is requesting the following regarding part number: PCM1840EVM.

"I am interested in part number: PCM1840EVM

A few questions:

0. Does the board do 4 ch at 192kHz sample rate for each channel?
0.5 The microphone inputs look like 'balanced' inputs - the differential
amplifier is on-board the EVM kit?
0.6 If so, is the diff amp circuit usable/licenseable IP?

1. Is it possible to 'clock synch' two or more of these boards?
1.5 How are they physically connected to do that?


2. Is there a software spec/example on how to get the digital audio
samples off the board?

3. Is there a path to production from the TI EVM kit? As in, how crazy is
it to go to fab on our own PCB boards, taking this kit as a reference?

4. What other licensing has to be taken into account in order to go from
this board to custom production?

Thanks much! I hope my question numbering scheme was taken at least as an
attempt at levity ..."

  • 0
    TI__Mastermind 27390 points

    0. Yes, each channel can be processed at 192kHz sampling

    0.5: The ADC only supports differential inputs and yes there is an onboard microphone designed into the EVM

    1. If by clock sync you mean daisy chaining the audio output to a shared TDM bus, then no. Because the device is hardware controlled, there isn't an algorithm coded in software to allow the user to configure the output data slot position. So if two devices were connected at SDOUT the data from each device would conflict with each other.

    2. You can probe SDOUT with an oscilloscope to validate recording. You can also use 'Audacity' digital audio analyzer to record audio as well.

    3. You can use EVM schematic, BOM and PCB pictures as reference for your own design

    4. No licensing required, just ensure Texas Instruments is not written on the silk screen as the designer for a custom built board.