DAEWOO ELECTRONICS DSL-19M1WCD Service Manual page 51

10. WM8714
The WM8714 is a high performance stereo DAC designed for audio applications such as
DVD, home theatre systems, and digital TV. The WM8714 supports data input word lengths
from 16 to 24-bits and sampling rates up to 96kHz. The WM8714 consists of a serial interface
port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a 14-pin
SOIC package.
The WM8714 has a hardware control interface for selection of audio data interface format,
mute and de-emphasis. The WM8714 supports I
The WM8714 is an ideal device to interface to AC-3
decoders for surround sound applications, or for use in DVD players.
·FEATURES
·Stereo DAC
·Audio Performance
- 95dB SNR ('A' weighted @ 48kHz) DAC
Boxes
- -90dB THD
·DAC Sampling Frequency: 8kHz – 96kHz
·Pin Selectable Audio Data Interface Format
2
- I S, Right Justified or DSP
·3-5V Supply Operation
·14-pin SOIC Package
·Pin Compatible with WM8725
·Pin Description
PIN NAME
1 LRCIN
2 DIN
3 BCKIN
4 NC
5 CAP
6 VOUTR
7 GND
8 VDD
9 VOUTL
10 MUTE
11 NC
12 DEEMPH
13 FORMAT
14 MCLK
24-bit, 96kHz Stereo DAC
TYPE
Digital input
Digital input
Digital input
No connect
Analogue output
Analogue output
Supply
Supply
Analogue output
Digital input
No connect
Digital input
Digital input
Digital input
2
S, and right Justified audio data interfaces.
TM TM
, DTS
·APPLICATIONS
DESCRIPTION
Sample rate clock input
Serial audio data input
Bit clock input
No internal connection
Analogue internal reference
Right channel DAC output
Negative supply
Positive supply
Left channel DAC output
Soft mute control, Internal pull down
High = Mute ON Low = Mute OFF
No internal connection
De-emphasis select, Internal pull up
High = de-emphasis ON
Data input format select, Internal pull up
Low = 16-bit right justified
System clock input
50
, and MPEG audio
·DVD Players
·Digital TV
·Digital Set Top
Low = de-emphasis OFF
2
High = 16-24-bit I S