WM8995L PDF даташит
Спецификация WM8995L изготовлена «Wolfson Microelectronics» и имеет функцию, называемую «Tereo DAC». |
|
Детали детали
Номер произв | WM8995L |
Описание | Tereo DAC |
Производители | Wolfson Microelectronics |
логотип |
30 Pages
No Preview Available ! |
www.DataSheet4U.com
w
WM8955L
Stereo DAC For Portable Audio Applications
DESCRIPTION
FEATURES
The WM8955L is a low power, high quality stereo DAC with
integrated headphone and loudspeaker amplifiers, designed to
reduce external component requirements in portable digital
audio applications.
•
•
•
The on-chip headphone amplifiers can deliver 40mW into a 16Ω
load. Advanced on-chip digital signal processing performs bass
and treble tone control.
The WM8955L can operate as a master or a slave, and
includes an on-chip PLL. It can use most master clock
frequencies commonly found in portable systems, including
USB, GSM, CDMA or PDC clocks, or standard 256fs clock
rates. Different audio sample rates such as 48kHz, 44.1kHz,
8kHz and many others are supported.
The WM8955L operates on supply voltages from 1.8V up to
3.6V, although the digital core can operate on a separate supply
down to 1.42V, saving power. Different sections of the chip can
also be powered down under software control.
•
•
•
•
•
•
•
•
DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz, 3.3V)
On-chip 400mW BTL Speaker Driver (mono)
On-chip Headphone Driver
- 40mW output power on 16Ω / 3.3V
- SNR 96dB, THD –79dB at 20mW with 16Ω load
Stereo and Mono Line-in mix into DAC output
Separately Mixed Stereo and Mono Outputs
Digital Tone Control and Bass Boost
Low Power
- Down to 7mW for stereo playback (1.8V / 1.5V supplies)
- 10µW Shutdown Mode
Low Supply Voltages
- Analogue and Digital I/O: 1.8V to 3.6V
- Digital core: 1.42V to 3.6V
Master clocks supported: GSM, CDMA, PDC, USB or
standard audio clocks
Audio sample rates supported: 8, 11.025, 12, 16, 22.05, 24,
32, 44.1, 48, 88.2, 96kHz
32-lead QFN package, 5x5x0.9mm size, 0.5mm lead pitch
The WM8955L is supplied in a very small and thin 5x5mm QFN
package, ideal for use in hand-held and portable systems.
APPLICATIONS
• Smartphone / Multimedia Phone
• Digital Audio Player
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Production Data, March 2006, Rev 4.2
Copyright 2006 Wolfson Microelectronics plc
No Preview Available ! |
www.DataSheet4U.com
WM8955L
TABLE OF CONTENTS
Production Data
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
RECOMMENDED OPERATING CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
TERMINOLOGY............................................................................................................. 7
OUTPUT PGA’S LINEARITY ......................................................................................... 8
HEADPHONE OUTPUT THD VERSUS POWER........................................................... 9
SPEAKER THD AND NOISE VERSUS POWER ......................................................... 10
POWER CONSUMPTION ....................................................................................11
AUDIO PATHS OVERVIEW .................................................................................12
SIGNAL TIMING REQUIREMENTS .....................................................................13
SYSTEM CLOCK TIMING............................................................................................ 13
AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 13
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 14
CONTROL INTERFACE TIMING – 3-WIRE MODE ..................................................... 14
CONTROL INTERFACE TIMING – 2-WIRE MODE ..................................................... 15
INTERNAL POWER ON RESET CIRCUIT ..........................................................16
DEVICE DESCRIPTION.......................................................................................17
INTRODUCTION.......................................................................................................... 17
SIGNAL PATH ............................................................................................................. 17
LINE INPUTS AND OUTPUT MIXERS ........................................................................ 21
ANALOGUE OUTPUTS ............................................................................................... 24
DIGITAL AUDIO INTERFACE...................................................................................... 28
MASTER CLOCK AND PHASE LOCKED LOOP ......................................................... 31
AUDIO SAMPLE RATES.............................................................................................. 33
CONTROL INTERFACE .............................................................................................. 35
POWER SUPPLIES ..................................................................................................... 36
POWER MANAGEMENT ............................................................................................. 37
REGISTER MAP...................................................................................................39
DIGITAL FILTER CHARACTERISTICS ...............................................................40
TERMINOLOGY........................................................................................................... 40
DAC FILTER RESPONSES ......................................................................................... 40
APPLICATIONS INFORMATION .........................................................................42
RECOMMENDED EXTERNAL COMPONENTS........................................................... 42
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS ........................................ 43
LINE OUTPUT CONFIGURATION............................................................................... 43
HEADPHONE OUTPUT CONFIGURATION ................................................................ 44
SPEAKER OUTPUT CONFIGURATION...................................................................... 44
PACKAGE DIMENSIONS ....................................................................................45
IMPORTANT NOTICE ..........................................................................................46
ADDRESS:................................................................................................................... 46
w
PD Rev 4.2 March 2006
2
No Preview Available ! |
Production Data
PIN CONFIGURATION
www.DataSheet4U.com
WM8955L
TOP VIEW
ORDERING INFORMATION
ORDER CODE
WM8955LSEFL
TEMPERATURE
RANGE
-25°C to +85°C
WM8955LSEFL/R
-25°C to +85°C
Note:
Reel quantity = 3,500
PACKAGE
32-lead QFN (5x5x0.9mm)
(Pb-free)
32-lead QFN (5x5x0.9mm)
(Pb-free, tape
and reel)
MOISTURE SENSITIVITY
LEVEL
MSL1
MSL1
PEAK SOLDERING
TEMPERATURE
260oC
260oC
w
PD Rev 4.2 March 2006
3
Скачать PDF:
[ WM8995L.PDF Даташит ]
Номер в каталоге | Описание | Производители |
WM8995L | Tereo DAC | Wolfson Microelectronics |
Номер в каталоге | Описание | Производители |
TL431 | 100 мА, регулируемый прецизионный шунтирующий регулятор |
Unisonic Technologies |
IRF840 | 8 А, 500 В, N-канальный МОП-транзистор |
Vishay |
LM317 | Линейный стабилизатор напряжения, 1,5 А |
STMicroelectronics |
DataSheet26.com | 2020 | Контакты | Поиск |