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PDF WM8733 Data sheet ( Hoja de datos )
| Número de pieza | WM8733 | |
| Descripción | 102dB Stereo DAC | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM8733 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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WM8733
102dB Stereo DAC
Product Preview, July 2000, Rev 1.3
DESCRIPTION
FEATURES
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 I2S 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.
• 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 I2S 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] (4)
SEL[1] (11)
FORMAT (13)
SCKI (14)
LRCIN (1)
DIN (2)
BCKIN (3)
SEL[0]
0
0
1
1
SEL[1]
0
1
0
1
MODE
Normal stereo
Power down
Left only differential output
Right only differential output
SERIAL
INTERFACE
DIGITAL
FILTERS
DIGITAL
SIGMA-DELTA
MODULATOR
DIGITAL
SIGMA-DELTA
MODULATOR
WM8733
SWITCHED
CAPACITOR
DAC
SWITCHED
CAPACITOR
DAC
(6) VOUTR
(9) VOUTL
INFINITE
ZERO
DETECT
10k
Wired
OR
(12) (10)
DEEMPH MUTE
DIGITAL
VDD
DIGITAL
GND
(8) (5) (7)
VDD CAP 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: [email protected]
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.
1 page  
Product Preview
WM8733
DEVICE DESCRIPTION
INTRODUCTION
WM8733 is a complete high performance stereo audio 18-bit digital-to-analogue converter, including
digital interpolation filter, multibit sigma-delta with dither, and switched capacitor multibit stereo DAC
and output smoothing filters.
Special functions of soft mute and de-emphasis are provided, and operation using system clock of
256fs, or 384fs or 512fs is provided, selection between either clock rate being automatically
controlled. Sample rates (fs) from less than 8ks/s to 96ks/s are allowed, provided the appropriate
system clock is input.
An auto mute function is provided which is enabled if MUTE (pin 10) is left at high impedance. If 64
successive left and right channel data samples of value 0 are received, auto mute is achieved. This
signal is wire ORed to MUTE (pin 10) via 10K resistor. If MUTE (pin 10) internally is not externally
driven, the internal auto mute state is visible on this pin as a weak drive strength signal (10kΩ
source).
MUTE
0
Z
1
Table 1 Soft Mute Control
DESCRIPTION
Soft mute is OFF
Auto mute is enabled
Soft mute is ON
A novel multi bit sigma-delta DAC design is used, utilising a 64x oversampling rate, to optimise
signal to noise performance and offer increased clock jitter tolerance.
Internally generated midrail references are used to DC bias output signals, requiring only a single
external capacitor for decoupling purposes.
The device is packaged in a small 14-pin SOIC package, offering pin compatibility with Burr Brown
PCM1733, but with added functionality of a soft mute input pin, which may be left floating to enable
auto mute detection, or held ‘low’ leaving the device operational.
Single 3V to 5V supplies may be used, the output amplitude scaling with absolute supply level. Low
supply voltage operation and low current consumption, and the low pin count small package, make
the WM8733 attractive for many consumer type applications.
WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 July 2000
5
5 Page 
Product Preview
PACKAGE DIMENSIONS
D: 14 PIN SOIC 3.9mm Wide Body
WM8733
DM001.C
e
14
B
8
E
H
17
D
h x 45o
A1
SEATING PLANE
-C-
α
A
0.10 (0.004)
Symbols
A
A1
B
C
D
E
e
H
h
L
α
Dimensions
(MM)
MIN MAX
1.35 1.75
0.10 0.25
0.33 0.51
0.19 0.25
8.55 8.75
3.80 4.00
1.27 BSC
5.80 6.20
0.25 0.50
0.40
0o
1.27
8o
Dimensions
(Inches)
MIN MAX
0.0532
0.0688
0.0040
0.0098
0.0130
0.0200
0.0075
0.0098
0.3367
0.3444
0.1497
0.1574
0.05 BSC
0.2284
0.2440
0.0099
0.0196
0.0160
0o
0.0500
8o
REF:
JEDEC.95, MS-012
NOTES:
A. ALL LINEAR DIMENSIONS ARE IN MILLIMETERS (INCHES).
B. THIS DRAWING IS SUBJECT TO CHANGE WITHOUT NOTICE.
C. BODY DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSION, NOT TO EXCEED 0.25MM (0.010IN).
D. MEETS JEDEC.95 MS-012, VARIATION = AB. REFER TO THIS SPECIFICATION FOR FURTHER DETAILS.
L
C
WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 July 2000
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet WM8733.PDF ] | |
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