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WM8725ED PDF даташит

Спецификация WM8725ED изготовлена ​​​​«Wolfson Microelectronics plc» и имеет функцию, называемую «99dB Stereo DAC».

Детали детали

Номер произв WM8725ED
Описание 99dB Stereo DAC
Производители Wolfson Microelectronics plc
логотип Wolfson Microelectronics plc логотип 

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WM8725ED Даташит, Описание, Даташиты
DESCRIPTION
WM8725 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 digital
inputs, high performance digital filters, and sigma-delta
output DACs, achieving an excellent 99dB signal-to-noise
performance.
The device is available in a 14-pin SO package that offers
selectable mute and de-emphasis functions using a
minimum of external components.
WM8725
99dB Stereo DAC
Production Data, July 2000, Rev 2.0
FEATURES
Compatible with PCM1725
99dB SNR performance
Stereo DAC with input sampling from 8kHz to 96kHz
Additional mute feature
Normal or I2S compatible data format
Sigma-delta design with 64x oversampling
System clock 256fs or 384fs
Supply range 3V to 5V
14-pin SOIC package
APPLICATIONS
Portable audio equipment
Video CD players
BLOCK DIAGRAM
FORMAT (13)
SCKI (14)
LRCIN (1)
DIN (2)
BCKIN (3)
SERIAL
INTERFACE
DIGITAL
FILTERS
DIGITAL
SIGMA-DELTA
MODULATOR
DIGITAL
SIGMA-DELTA
MODULATOR
WM8725
SWITCHED
CAPACITOR
DAC
SWITCHED
CAPACITOR
DAC
(6) VOUTR
(9) VOUTL
(12) (10)
DEEMPH MUTE
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
http://www.wolfson.co.uk
(8) (5) (7)
VDD CAP GND
Production Data datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and Conditions.
2000 Wolfson Microelectronics Ltd.









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WM8725ED Даташит, Описание, Даташиты
WM8725
PIN CONFIGURATION
LRCIN
DIN
BCKIN
NC
CAP
VOUTR
GND
1 14
2 13
3 12
WM8725
4 11
5 10
69
78
SCKI
FORMAT
DEEMPH
NC
MUTE
VOUTL
VDD
Production Data
ORDERING INFORMATION
DEVICE
WM8725ED
TEMP. RANGE
-25 to +85oC
PACKAGE
14-pin SOIC
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating
at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under
Electrical Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically
susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during
handling and storage of this device.
CONDITION
Supply voltage
Reference input
Operating temperature range, TA
Storage temperature
Lead temperature (soldering, 10 seconds)
Lead temperature (soldering, 2 minutes)
MIN
-0.3V
o
-25 C
o
-65 C
MAX
+7.0V
VCC+0.3V
o
+85 C
o
+150 C
o
+260 C
o
+183 C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Range
Ground
Supply Current
SYMBOL
VDD
GND
TEST
CONDITIONS
VDD = 5V
VDD = 3V
MIN TYP MAX
-10%
3.0 to 5.0
0
15
7.5
+10%
25
UNIT
V
V
mA
mA
WOLFSON MICROELECTRONICS LTD
PD Rev 2.0 July 2000
2









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WM8725ED Даташит, Описание, Даташиты
Production Data
WM8725
ELECTRICAL CHARACTERISTICS
Test Conditions
VDD = 5V, GND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Digital Logic Levels
Input LOW level
Input HIGH level
Analogue Output Levels
VIL
VIH
Minimum resistance load
To midrail or AC coupled
(5V supply)
To midrail or AC coupled
(3V supply)
Maximum capacitance load
5V or 3V
Output DC level
Reference Levels
Potential divider resistance
VDD to CAP and CAP to GND
Voltage at CAP
VDD = 5V
DAC Circuit Specifications
SNR (Note 1)
VDD = 5V
VDD = 3V
Full scale output voltage
Into 10kohm VDD = 5V, 0dB
Into 10kohm VDD = 3V, 0dB
THD (Full scale)
0dB
THD+N (Dynamic range)
-60dB
Frequency response
Transition band
Out of band rejection
Channel Separation
Gain mismatch
channel-to-channel
Audio Data Input and System Clock Timing Information
BCKIN pulse cycle time
tBCY
BCKIN pulse width high
tBCH
BCKIN pulse width low
BCKIN rising edge to LRCIN edge
LRCIN rising edge to BCKIN
rising edge
tBCL
tBL
tLB
DIN setup time
tDS
DIN hold time
tDH
System clock pulse width high
System clock pulse width low
tSCKIH
tSCKIL
Notes:
MIN
2.0
80
2.3
90
0.9
0
20,000
100
50
50
30
30
30
30
13
13
TYP
1
1
100
VDD/2
100
2.5
99
97
1.0
0.6
0.01
92
-40
90
±1
MAX
UNIT
0.8 V
V
kohms
kohms
pF
V
120 kohms
2.7 V
1.1
0.02
20,000
±5
dB
dB
VRMS
VRMS
%
dB
Hz
Hz
dB
dB
%FSR
ns
ns
ns
ns
ns
ns
ns
ns
ns
1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured
Aweighted over a 20Hz to 20kHz bandwidth.
2. All performance measurements done with 20kHz low pass filter. Failure to use such a filter will result in higher
THD+N and lower SNR and Dynamic Range readings than are found in the Electrical Characteristics. The low pass
filter removes out of band noise; although it is not audible, it may affect dynamic specification values.
WOLFSON MICROELECTRONICS LTD
PD Rev 2.0 July 2000
3










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Номер в каталогеОписаниеПроизводители
WM8725ED99dB Stereo DACWolfson Microelectronics plc
Wolfson Microelectronics plc

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