STAC9750 Datasheet, PDF (72/73 Pages) Integrated Device Technology – VALUE-LINE TWO-CHANNEL AC’97 CODECS

STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
PC AUDIO
16. REVISION HISTORY
Revision
5.2
5.3
5.4
5.5
5.6
5.7
5.8
Date
October 2003
June 2004
January 2005
February 2005
March 2005
December 2005
30 October 2006
Description of Change
Corrected error on page 26: Slot 1 Status Address Port, bit D2 is a SLot Request not Reserved as
stated in rev 5.1
Added CD_GND elaboration note on connection diagram, pin list and pin out diagrams:
The CD_GND signal is an AC signal return for the two CD input channels. It is normally biased at
about 2.5V. The name of the pin in the AC97 specification is CD_GND, and this has confused many
designers. It should not have any DC path to GND. Connecting the CD_GND signal directly to
ground will change the internal bias of the entire CODEC, and cause significant distortion. If there is
no analog CD input, then this pin can be No-Connect.
Corrected Note 4 in performance characteristics, was missing the text “Ratio of Full Scale signal to
THD+N output with -3dB signal, measured “A weighted” over a”. Complete note now reads “Ratio of
Full Scale signal to THD+N output with -3dB signal, measured “A weighted” over a 20 Hz to a 20
KHz bandwidth. 48 KHz Sample Frequency”.
Added updated 48-pin package drawing. Added reflow profile information.
Revised reflow profile information
Revised TQFP to say LQFP.
Updated with new logo template
Added Part order information for RoHS package, with EOL information to Pb-bearing
Removed references to older revisions (CA3) and their relationship to CC1, as CA3 is EOL and CC1
is the only production revision.
Initial release in IDT format.
IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
72
STAC9750/9751
V 5.8 103106