WM8733
102dB Stereo DAC
Product Preview, July 2000, Rev 1.3
DESCRIPTION
WM8733 is a high performance stereo DAC designed for use in
portable audio equipment, video CD players and similar
applications. It comprises selectable normal or I
2
S compatible
serial data interfaces for 16 to 24-bit inputs, high performance
digital filters, and sigma-delta output DACs, achieving an 102dB
signal-to-noise ratio.
The device is available in a 14-pin SOIC package that offers
selectable mute and de-emphasis functions using a minimum of
external components.
Low supply voltage operation and low current consumption are
valuable features, particularly for use in portable equipment.
Additional modes consist of a powerdown option and the
possibility of generating separate differential left and right
outputs for applications demanding higher performance.
FEATURES
•
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High tolerance to clock jitter
Compatible with PCM1733
Distortion > 90dB, SNR > 102dB, dynamic range
performance > 100dB
Stereo DAC with input sampling from 8kHz to 96kHz
Additional mute feature and high performance
differential modes
Normal or I
2
S compatible data format
Sigma-delta design with 64x oversampling
System clock 256fs or 384fs or 512fs
Supply range 3V to 5V
Analogue voltage output to drive 2kΩ load
14-pin SOIC package
APPLICATIONS
•
High performance consumer audio
BLOCK DIAGRAM
SEL[0] SEL[1] MODE
0
0
Normal stereo
0
1
Power down
1
0
Left only differential output
1
1
Right only differential output
SEL[0] (4)
SEL[1] (11)
FORMAT (13)
SCKI (14)
LRCIN (1)
DIN (2)
BCKIN (3)
WM8733
SWITCHED
CAPACITOR
DAC
DIGITAL
SIGMA-DELTA
MODULATOR
SERIAL
INTERFACE
DIGITAL
FILTERS
DIGITAL
SIGMA-DELTA
MODULATOR
(6) VOUTR
SWITCHED
CAPACITOR
DAC
(9) VOUTL
INFINITE
ZERO
DETECT
10k
Wired
OR
(12) (10)
DEEMPH MUTE
DIGITAL
VDD
DIGITAL
GND
(8)
VDD
(5)
CAP
(7)
GND
WOLFSON MICROELECTRONICS LTD.
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
http://www.wolfson.co.uk
Product Preview
data sheets contain
specifications for products in the formative
phase of development. These products may
be changed or discontinued without notice.
2000
Wolfson Microelectronics Ltd
.
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
