WM8972L PDF даташит
Спецификация WM8972L изготовлена «Wolfson Microelectronics plc» и имеет функцию, называемую «MONO CODEC FOR PORTABLE AUDIO APPLICATIONS». |
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Детали детали
Номер произв | WM8972L |
Описание | MONO CODEC FOR PORTABLE AUDIO APPLICATIONS |
Производители | Wolfson Microelectronics plc |
логотип |
30 Pages
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WM8972L
Mono CODEC for Portable Audio Applications
DESCRIPTION
The WM8972L is a low power, high quality mono CODEC
designed for portable digital audio applications.
The device integrates complete interfaces to mono
microphones. External component requirements are
drastically reduced as no separate microphone amplifiers
are required. Advanced on-chip digital signal processing
performs graphic equaliser and automatic level control for
the microphone or line input.
The WM8972L can operate as a master or a slave, with
various master clock frequencies including 12 or 24MHz for
USB devices, or standard 256fs rates like 12.288MHz and
24.576MHz. Different audio sample rates such as 96kHz,
48kHz, 44.1kHz are generated directly from the master
clock without the need for an external PLL.
The WM8972L operates at supply voltages down to 1.8V,
although the digital core can operate at voltages down to
1.42V to save power, and the maximum for all supplies is
3.6 Volts. Different sections of the chip can also be powered
down under software control.
The WM8972L is supplied in a very small and thin 5x5mm
QFN package, ideal for use in hand-held and portable
systems.
BLOCK DIAGRAM
FEATURES
• DAC SNR 98dB (‘A’ weighted), THD –84dB at 48kHz, 3.3V
• ADC SNR 95dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
• Complete Mono Microphone Interface
- Programmable ALC / Noise Gate
• On-chip 400mW BTL Speaker Driver (mono)
• Digital Graphic Equaliser
• Low Power
- 7mW mono playback (1.8V / 1.5V supplies)
- 14mW record & playback (1.8V / 1.5V supplies)
• Low Supply Voltages
- Analogue 1.8V to 3.6V
- Digital core: 1.42V to 3.6V
- Digital I/O: 1.8V to 3.6V
• 256fs / 384fs or USB master clock rates: 12MHz, 24MHz
• Audio sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48,
88.2, 96kHz generated internally from master clock
• 5x5x0.9mm QFN package
APPLICATIONS
• Digital Still Cameras
• Toys
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Preliminary Technical Data, June 2004, Rev 2.2
Copyright 2004 Wolfson Microelectronics plc
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WM8972L
Preliminary Technical Data
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATION CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
OUTPUT PGA’S LINEARITY ......................................................................................... 7
POWER CONSUMPTION ......................................................................................8
SIGNAL TIMING REQUIREMENTS .......................................................................9
SYSTEM CLOCK TIMING.............................................................................................. 9
AUDIO INTERFACE TIMING – MASTER MODE ........................................................... 9
AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 10
DEVICE DESCRIPTION.......................................................................................13
INTRODUCTION.......................................................................................................... 13
INPUT SIGNAL PATH.................................................................................................. 13
AUTOMATIC LEVEL CONTROL (ALC) ....................................................................... 18
OUTPUT SIGNAL PATH.............................................................................................. 21
ANALOGUE OUTPUTS ............................................................................................... 26
ENABLING THE OUTPUTS ......................................................................................... 27
THERMAL SHUTDOWN .............................................................................................. 27
DIGITAL AUDIO INTERFACE...................................................................................... 28
AUDIO INTERFACE CONTROL .................................................................................. 31
CLOCKING AND SAMPLE RATES .............................................................................. 32
CONTROL INTERFACE .............................................................................................. 34
POWER SUPPLIES ..................................................................................................... 35
POWER MANAGEMENT ............................................................................................. 36
REGISTER MAP .......................................................................................................... 38
DIGITAL FILTER CHARACTERISTICS ...............................................................39
TERMINOLOGY........................................................................................................... 39
DAC FILTER RESPONSES ......................................................................................... 40
ADC FILTER RESPONSES ......................................................................................... 41
DE-EMPHASIS FILTER RESPONSES ........................................................................ 42
HIGHPASS FILTER ..................................................................................................... 43
APPLICATIONS INFORMATION .........................................................................44
RECOMMENDED EXTERNAL COMPONENTS........................................................... 44
LINE INPUT CONFIGURATION................................................................................... 45
MICROPHONE INPUT CONFIGURATION .................................................................. 45
MINIMISING POP NOISE AT THE ANALOGUE OUTPUTS ........................................ 46
POWER MANAGEMENT EXAMPLES ......................................................................... 46
IMPORTANT NOTICE ..........................................................................................48
ADDRESS:................................................................................................................... 48
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PTD Rev 2.2 June 2004
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Preliminary Technical Data
PIN CONFIGURATION
24 23 22 21 20 19 18 17
INPUT2- 25
INPUT2+ 26
INPUT1- 27
INPUT1+ 28
MODE 29
CSB 30
SDIN 31
SCLK 32
16 OUT+
15 OUT-
14 OPGND
13 DNC
12 DNC
11 OUT2
10 MONOOUT
9 ADCLRC
12345678
WM8972L
ORDERING INFORMATION
ORDER CODE
WM8972LEFL
WM8972LEFL/R
TEMPERATURE
RANGE
-25°C to +85°C
-25°C to +85°C
WM8972LGEFL
-25°C to +85°C
WM8972LGEFL/R
-25°C to +85°C
Note:
Reel quantity = 3,500
PACKAGE
32-pin QFN (5x5x0.9mm)
32-pin QFN (5x5x0.9mm)
(tape and reel)
32-pin QFN (5x5x0.9mm)
(lead free)
32-pin QFN (5x5x0.9mm)
(lead free, tape and reel)
MOISTURE SENSITIVITY
LEVEL
MSL1
MSL1
MSL1
MSL1
PEAK SOLDERING
TEMPERATURE
260oC
260oC
260oC
260oC
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PTD Rev 2.2 June 2004
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Номер в каталоге | Описание | Производители |
WM8972L | MONO CODEC FOR PORTABLE AUDIO APPLICATIONS | Wolfson Microelectronics plc |
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