http://www.cirrus.com/en/products/pro/detail/P1024.html http://www.cirrus.com/en/pubs/proDatasheet/CS5381_F2.pdf 120 dB DNR and I2S interface, differential. Bob N4HY -- AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman Laziness is the number one inspiration for ingenuity. Guilty as charged!