udance@Outlaw.UWyo.Edu (Jonathan J Smith) (12/19/90)
Just a quick note to those of you who were interested in ADC's (analog to digital converters..) Burr-Brown just recently (within a year) released a new ADC it is a 2 channel 18 bit jobber..(great to sterio audio..!) it runs up to /at 200kHz. Say 4 times oversampling of audio.. at 192kHz..might be a really good chip for some home projects. a few specs.. 18-bit successive-approximation registers..(2 of them! on 1 chip) its serial out data wise (but adding registers are no big deal) (ps the sampling is inherent in the process switched capacitors) both channels run in synch (solving yet another troublesome problem) typical jitter (apeture uncertianty ) is 50 ps and noise between channels of 20 uV. it has a built in voltage reference and inputs to add your own. power consumption is a mere 300mW maximum, 28mA from +5v rail, 13mA from -5V rail. it goes for less than $30 dollars..total . So a reasonable price for such a chip..(also maximum of -92dB total harmonic distortion plus noise.... and if you add say a DSP into the circuit with averaging and such it can only get better.. , just averaging puts you up to -101dB to -102dB..) anbody getting any ideas?? hope so and if not.. here te info anyway. Burr-Brown Corp. P.O. Box 11400 Tucson, AZ 85734 the part number for the chip is PCM1750 .. Jonathan Smith (full-time weirdo) udance@uwyo.outlaw.edu have fun :)