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WM8721L PDF даташит

Спецификация WM8721L изготовлена ​​​​«Wolfson Microelectronics plc» и имеет функцию, называемую «portable digital audio solutions».

Детали детали

Номер произв WM8721L
Описание portable digital audio solutions
Производители Wolfson Microelectronics plc
логотип Wolfson Microelectronics plc логотип 

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WM8721L Даташит, Описание, Даташиты
WM8721
Internet Audio DAC with Integrated Headphone Driver
Product Preview, November 2000, Rev 1.3
DESCRIPTION
The WM8721 is a low power stereo DAC with an integrated
headphone driver. The WM8721 is designed specifically for
portable MP3 audio and speech players. The WM8721 is
also ideal for MD, CD machines and DAT players.
Stereo 24-bit multi-bit sigma delta DACs are used with
oversampling digital interpolation filters. Digital audio input
word lengths from 16-32 bits and sampling rates from 8KHz
to 96KHz are supported.
Stereo audio outputs are buffered for driving headphones
from a programmable volume control, line level outputs are
also provided along with anti-thump mute and power
up/down circuitry.
The device is controlled via a 2 or 3 wire serial interface.
The interface provides access to all features including
volume controls, mutes, de-emphasis and extensive power
management facilities. The device is available in a small 20-
pin SSOP package.
A USB mode is provided where all audio rates can be
derived from a simple 12MHz MCLK, saving on need for
PLL or multiple crystals.
FEATURES
Audio Performance
100dB SNR (‘A’ weighted @ 48kHz) DAC
1.42 – 3.6V Digital Supply Operation
2.7 – 3.6V Analogue Supply Operation
DAC Sampling Frequency: 8KHz – 96KHz
2 or 3-Wire MPU Serial Control Interface
Programmable Audio Data Interface Modes
I2S, Left, Right Justified or DSP
16/20/24/32 bit Word Lengths
Stereo Audio Outputs
Output Volume and Mute Controls
Highly Efficient Headphone Driver
Playback Mode Power Consumption < 18mW
20-Pin SSOP Package
APPLICATIONS
Portable MP3 Players
CD and Minidisc Players
BLOCK DIAGRAM
DACDAT (3)
DACLRC (4)
BCLK (2)
(15) (16) (17) (14)
(11) (13) (12)
WM8721
CONTROL INTERFACE
DIGITAL
FILTERS
DAC
+6 to -73dB
1 dB Steps
VOL/
MUTE
H/P
DRIVER
CLKIN
DIVIDER
(Div x1, x2)
(18)
DAC
(19) (1) (20)
VOL/
MUTE
H/P
DRIVER
+6 to -73dB
1 dB Steps
(5) HPVDD
(8) HPGND
(7) RHPOUT
(10) ROUT
(9) LOUT
(6) LHPOUT
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
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.









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WM8721L Даташит, Описание, Даташиты
WM8721
Product Preview
PIN CONFIGURATION
DBVDD
BCLK
DACDAT
DACLRC
HPVDD
LHPOUT
HPOUT
HPGND
LOUT
ROUT
1
2
3
4
5
WM8721
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DGND
DCVDD
MCLK
SCLK
SDIN
CSB
MODE
VMID
AGND
AVDD
ORDERING INFORMATION
DEVICE
XWM8721EDS
TEMP. RANGE
-10 to +70oC
PACKAGE
20-pin SSOP
PIN DESCRIPTION
PIN NAME
1 DBVDD
2 BCLK
3 DACDAT
4 DACLRC
5 HPVDD
6 LHPOUT
7 RHPOUT
8 HPGND
9 LOUT
10 ROUT
11 AVDD
12 AGND
13 VMID
14 MODE
15 CSB
16 SDIN
17 SCLK
18 MCLK
19 DCVDD
20 DGND
TYPE
Supply
Digital Input/Output
Digital Input
Digital Input/Output
Supply
Analogue Output
Analogue Output
Ground
Analogue Output
Analogue Output
Supply
Ground
Analogue Output
Digital Input
Digital Input
Digital Input
Digital Input
Digital Input
Supply
Ground
DESCRIPTION
Digital Buffers VDD
Digital Audio Port Clock
DAC Digital Audio Data Input
DAC Sample Rate Clock
Headphone VDD
Left Channel Headphone Output
Right Channel Headphone Output
Headphone GND
Left Channel Line Output
Right Channel Line Output
Analogue VDD
Analogue GND
Mid-rail reference decoupling point
Control Interface Selection, Pull up (on power up only)
3-Wire MPU Chip Select/ 2-Wire MPU interface address selection, active
low, Pull up (on power up only)
3-Wire MPU Data Input / 2-Wire MPU Data Input
3-Wire MPU Clock Input / 2-Wire MPU Clock Input
Master Clock Input (MCLK)
Digital Core VDD
Digital GND
WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 November 2000
2









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WM8721L Даташит, Описание, Даташиты
WM8721
Product Preview
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
MIN MAX
Digital supply voltage
-0.3V
+3.63V
Analogue supply voltage
-0.3V
+3.63
Voltage range digital inputs
DGND -0.3V
DVDD +0.3V
Voltage range analogue inputs
AGND -0.3V
AVDD +0.3V
Master Clock Frequency
18.432MHz
Operating temperature range, TA
Storage temperature
-10°C
-65°C
+70°C
+150°C
Package body temperature (soldering 10 seconds)
+240°C
Package body temperature (soldering 2 minutes)
+183°C
Notes:
1. Analogue and digital grounds must always be within 0.3V of each other.
2. The digital supply core voltage (DCVDD) must always be less than or equal to the analogue supply voltage (AVDD) or
digital supply buffer voltage (DBVDD).
3. The digital supply buffer voltage (DBVDD) must always be less than or equal to the analogue supply voltage (AVDD).
WOLFSON MICROELECTRONICS LTD
PP Rev 1.3 November 2000
3










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Номер в каталогеОписаниеПроизводители
WM8721Internet Audio DAC with Integrated Headphone DriverWolfson Microelectronics plc
Wolfson Microelectronics plc
WM8721portable digital audio solutionsWolfson Microelectronics plc
Wolfson Microelectronics plc
WM8721Lportable digital audio solutionsWolfson Microelectronics plc
Wolfson Microelectronics plc

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