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SONY,
CXD2555Q
IBit
AD/DA
Converter
for
Audio
Application
Preliminary
Description
The
CXD2555Q,
which
features
a
2nd
order
AX
noise shaper,
is
an
extremely
cost-effective
1-bit,
1
-Chip stereo
AD/DA
converter with
ort-chip digital
filters.
Features
•
2-channel
AD
and
DA
converters, plus
digital
fil-
ters for
decimation
and
over-sampling
for
each
converter,
all
on
a single
chip.
•
Use
of
internal
peripheral
analog
circuits for
AD
converter
greatly
simplifies
external elements,
•
Distortion: within
0.01%
(both
AD
and DA)
•
S/N
ratio;
DA
converter: At
least
90d8
AD
converter:
At
least
80dB
Structure
Silicon-gate
CMOS
Functions
•
On-chip
digital
filter
enables data input/output
at
rate of
IXFs
•
Simple connection
of multiple
CXD2555QS
enable
multi-channel
system
•The
32
slot
serial
data
interface
enables
in-
dependent
selection
of
data forward-packing/
rearward-packing
and
MSB-first/LSB-first,
•
Applicable
to
four
master
clocks:
256Fs,
512Fs,
768Fs,and 1024Fs
•
Applicable
to
low
Fs
frequencies of 16k,
Sk and
etc
in
addition
to
usual Fs frequencies
of
48k,
44.1k,
and 32k
•
Outputs
different division
clocks
according
to
the
type
of LSI
chips
connected
Block
Diagram
oie
'*L
H.lifl
A0C1
-
"
©
A
94
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