Keith Bowers wrote:
AD2S90-EB PRODUCTION Evaluation Boards - COMMERCIAL $89.06 AD2S90AP PRODUCTION PLASTIC LEAD CHIP CARRIER 20 COMMERCIAL $29.16
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I expect to need a 2-axis resolver to quadratyre board, so I did a bit more checking.
The evaluation board price above is quantity 1.
Unfortunately the above price for the chip is quantity 100 and is not available for online purchase from Analog Devices WEB site.
Pioneer has ad2s90ap in stock with the quantity 1 price as $44.86. You probably want an ad2s99 reference oscillator @$10.73 too, but out of stock.
At a guess a 2-axis board with just quadrature output could probably be hand wired for around $125 with all new parts.
More thinking is in order; such as serial out to a computer.
I have looked at these, and someone finally got smart! The cost for a 12 bit board back in 99 was very high. It took 2 8 bit convertor chips, a special chip to add their outputs together, and a high priced osc. The 8 bit chips were on the order of $300.00 each as I remember, and the adder was about the same.
Bill Higdon
