Here's the schematic.
Test Code: (UPDATED) This is a complete ISE 10.3 SP3 project targeting the Avnet Spartan 3A EVK which drives the DAC at a rate of 41.7kHz for evaluation purposes. It provides a sawtooth on the left channel and a sine on the right channel. The A and B capsense pads raise and lower the pitch and the C pad serves as a gate.
Price is $25 (US) each and $5 shipping for any quantity up to 5. Payment via Paypal is preferred. Please contact me prior to paying to ensure that I've got sufficient stock to cover your order.
Update 03-17-10: uh-bdee..ub-bdee..That's all folks! I've sold
27 of these to customers across the world over the last 15 months and
I'm not making any more of them. You can buy bare boards from BatchPCB here:
AudioDAC PCB @ BatchPCB
Update 03-25-10: Several folks are interested in building these for
themselves, so here's the BOM with Digi-Key part numbers:
Update 01-13-11: Digilent is now selling their own version of the Audio DAC: Digilent I2S PMOD I believe that it is pin-for-pin compatible with my old one, but I've ordered one to check for certain. More to come...
Update 04-10-11: I've gotten a couple of Digilent's I2S PMODs to try out and they appear to work just fine. One major caution: Digilient's documentation appears to be wrong - their datasheet and schematic have the pinout shown reversed. The correct pinout is:
Here's a copy of my test design targeted at the Nexsys2 board. A README.TXT file is included to explain how to use it:
Nexsys2 I2S PMOD design (ISE 10.3 and 11.5)
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