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PDF WM8711L Data sheet ( Hoja de datos )
| Número de pieza | WM8711L | |
| Descripción | Internet Audio DAC | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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WM8711 / WM8711L
Internet Audio DAC with Integrated Headphone Amplifier
DESCRIPTION
FEATURES
The WM8711 or WM8711L (WM8711/L) is a low power
stereo DAC with an integrated headphone driver. The
WM8711/L is designed specifically for portable MP3 audio
and speech players. The WM8711/L 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 28-
lead SSOP package or the smaller 28-lead QFN (5x5x0.9
mm Body) package.
• Audio Performance
- DAC SNR 100dB (‘A’ weighted) at AVDD = 3.3V
- DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V
(WM8711L)
• Low Power Headphone Playback
- Down to 20mW at 3.3V
- Down to 6mW at 1.8V (WM8711L)
- 1.42 – 3.6V Digital Supply Operation
- 2.7 – 3.6 V Analogue Supply Operation
- 1.8 – 3.6 V Analogue Supply Operation (‘L’ Variant)
• 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
- Master or Slave Clocking Mode
• Stereo Audio Outputs
• Output Volume and Mute Controls
• Highly Efficient Headphone Driver
• 28-lead SSOP or 28-lead QFN (5x5x0.9 mm) package
A USB mode is provided where all audio rates can be
APPLICATIONS
derived from a single 12MHz or 24MHz MCLK, saving owwnw.DataSheet4U.com
the need for a PLL or multiple crystals.
• Portable MP3 Players
• CD and Minidisc Players
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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Production Data, September 2006, Rev 4.3
Copyright 2006 Wolfson Microelectronics plc
1 page  
Production Data
WM8711 / WM8711L
PIN DESCRIPTION
28 LEAD
SSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
28 LEAD
QFN
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
NAME
DBVDD
CLKOUT
BCLK
DACDAT
DACLRC
HPVDD
LHPOUT
RHPOUT
HPGND
LOUT
ROUT
AVDD
AGND
VMID
RLINEIN
LLINEIN
MODE
CSB
TYPE
DESCRIPTION
Supply
Digital Output
Digital Input/Output
Digital Input
Digital Input/Output
NC
NC
Supply
Analogue Output
Analogue Output
Ground
Analogue Output
Analogue Output
Supply
Ground
Analogue Output
NC
NC
Analogue Input
Analogue Input
Digital Input
Digital Input
Digital Buffers VDD
Buffered Clock Output
Digital Audio Bit Clock, Pull Down (see Note 1)
DAC Digital Audio Data Input
DAC Sample Rate Left/Right Clock, Pull Down (see Note 1)
No Connection
No Connection
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
No Connection
No Connection
Right Channel Line Input (AC coupled)
Left Channel Line Input (AC coupled)
Control Interface Selection, Pull up (see Note 1)
3-Wire MPU Chip Select/ 2-Wire MPU interface address
selection, active low, Pull up (see Note 1)
23 27
24 28
25 1
26 2
27 3
28 4
SDIN
SCLK
XTI/MCLK
XTO
DCVDD
DGND
Digital Input/Output
Digital Input
Digital Input
Digital Output
Supply
Ground
3-Wire MPU Data Input / 2-Wire MPU Data Input
3-Wire MPU Clock Input / 2-Wire MPU Clock Input
Crystal Input or Master Clock Input (MCLK)
Crystal Output
Digital Core VDD
Digital GND
Note:
1. Pull Up/Down only present when Control Register Interface ACTIVE=0 to conserve power.
2. It is recommended that the QFN ground paddle is connected to analogue ground on the application PCB.
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PD Rev 4.3 September 2006
5
5 Page 
Production Data
POWER CONSUMPTION – WM8711L
WM8711 / WM8711L
MODE DESCRIPTION
CURRENT CONSUMPTION
TYPICAL
DAC Playback, oscillator 0 0 0 0 0
and CLKOUT enabled
DAC Playback, using
external MCLK
01100
Standby
01111
Power Down
11111
Table 2 Powerdown Mode Current Consumption Examples
AVDD
(1.8V)
1.7
HPVDD DCVDD DBVDD
(1.8V) (1.5V) (1.8V)
0.5 1.2 0.8
UNITS
mA
1.7 0.5 1.2 0.03 mA
9 0.1 0.4 - µA
- - 0.3 - µA
Notes:
1. TA = +25oC. Slave Mode, fs = 48kHz, MCLK = 256fs (12.288MHz).
2. All figures are quiescent, with no signal.
3. The power dissipation in the headphone itself not included in the above table.
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PD Rev 4.3 September 2006
11
11 Page | ||
| Páginas | Total 47 Páginas | |
| PDF Descargar | [ Datasheet WM8711L.PDF ] | |
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