Wednesday, June 27, 2007

QS1RT Prototype 06272007

QS1RT:

Please click on the image to see a larger version.

Tuesday, June 19, 2007

TI PCM4222 ADC Now Available

PCM4222:

TI's 24 bit, 216 kHz, 2 channel ADC is now available. 122 dB dynamic range is claimed. The part comes in a 48 pin TQFP package. It is available from Digi-Key in single quantities at $22.42 each.

Here is the link: PCM4222

This is a FFT plot of the PCM4222 at 192 kHz with no input:


The rise in amplitude at about 65 kHz is a concern, but for SDR use a bandwidth of 130 kHz would still be useful.

The PCM4222 is definitely easier to get in single quantities for experimenters than the AKM AK5394 is, but the AKM chip is still probably the winner.