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WM8737CLGEFL/R

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40
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WM8737L
Stereo ADC with Microphone Preamplifier
WOLFSON MICROELECTRONICS plc
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Production Data, January 2012, Rev 4.4
Copyright 2012 Wolfson Microelectronics plc
DESCRIPTION
The WM8737L is a low power stereo audio ADC designed
specifically for portable applications such as minidisc and
memory audio / voice recorders.
The device offers three sets of stereo inputs, which can be
configured for line-level signals, for internal or table-top
microphones, or for DC measurement (battery monitor). A
programmable gain amplifier can be used for automatic level
control (ALC) with user programmable hold, attack and
decay times. The device also has a selectable high pass
filter to remove residual DC offsets.
If the signal source is mono, the WM8737L can run in mono
mode, saving power. It can also mix two channels to mono,
either in the analogue or the digital domain.
Master or slave mode clocking schemes are offered. Stereo
24-bit multi-bit sigma-delta ADCs are used with digital audio
output word lengths from 16-32 bits, and sampling rates
from 16kHz to 96kHz supported.
The device is controlled via a 2 or 3 wire serial interface.
The interface provides access to all features including gain
controls, analogue or digital mono mixing, and power
management facilities. The device is supplied in a leadless
5x5mm QFN package.
FEATURES
SNR 97dB (‘A’ weighted @ 3.3V, 48kHz, normal power
mode)
THD –84dB (at –1dB, 3.3V, normal power mode)
Complete Stereo / Mono Microphone Interface
- Programmable microphone preamp
- Automatic Level Control
- Low-noise microphone bias voltage
Configurable Power / Performance
Low Power Mode
- 8.5mW at AVDD = 1.8V (stereo, mic preamps off)
- 20mW at AVDD = 3.3V (stereo, mic preamps off)
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: 16, 22.05, 24, 32, 44.1, 48, 88.2, 96kHz
generated internally from master clock
32-pin QFN package, 5 x 5 x 0.9mm
APPLICATIONS
Memory Audio / Voice Recorders
Minidisc Recorders
Portable Digital Music Systems
BLOCK DIAGRAM
LINSELRINSEL
CSB
SDI N
SCLK
MODE
VREF
AV DD
AG ND
VMID
VREFP
VREFN
AUDIO
INTERFACE
VREFP
VRE FN
50K
WM8737L Production Data
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PD, Rev 4.4, January 2012
2
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 OPERATING CONDITIONS ..................................................... 5
ELECTRICAL CHARACTERISTICS ..................................................................... 6
TERMINOLOGY ............................................................................................................... 8
POWER CONSUMPTION ...................................................................................... 9
SIGNAL TIMING REQUIREMENTS .................................................................... 11
DEVICE DESCRIPTION ...................................................................................... 14
INTRODUCTION ............................................................................................................ 14
INPUT SIGNAL PATH .................................................................................................... 14
ANALOGUE TO DIGITAL CONVERTER (ADC) ............................................................ 19
3D STEREO ENHANCEMENT ...................................................................................... 20
AUTOMATIC LEVEL CONTROL (ALC) ......................................................................... 21
DIGITAL AUDIO INTERFACE ........................................................................................ 24
MASTER CLOCK AND AUDIO SAMPLE RATES .......................................................... 28
CONTROL INTERFACE................................................................................................. 30
POWER SUPPLIES ....................................................................................................... 31
POWER MANAGEMENT ............................................................................................... 31
REGISTER MAP .................................................................................................. 32
DIGITAL FILTER CHARACTERISTICS .............................................................. 33
TERMINOLOGY ............................................................................................................. 33
DIGITAL FILTER RESPONSES ..................................................................................... 34
APPLICATIONS INFORMATION ........................................................................ 36
LINE INPUT CONFIGURATION ..................................................................................... 36
MICROPHONE INPUT CONFIGURATION .................................................................... 36
RECOMMENDED EXTERNAL COMPONENTS .................................................. 37
PACKAGE DIMENSIONS .................................................................................... 38
IMPORTANT NOTICE ......................................................................................... 39
ADDRESS: ..................................................................................................................... 39
REVISION HISTORY ........................................................................................... 40
Production Data WM8737L
w
PD, Rev 4.4, January 2012
3
PIN CONFIGURATION
ORDERING INFORMATION
ORDER CODE TEMPERATURE
RANGE
PACKAGE MOISTURE SENSITIVITY
LEVEL
PEAK SOLDERING
TEMPERATURE
WM8737CLGEFL -25C to +85C
32-pin QFN (5x5x0.9mm)
lead free
MSL1 260°C
WM8737CLGEFL/R -25C to +85C 32-pin QFN (5x5x0.9mm)
lead free, tape
and reel
MSL1 260°C
Note:
Reel Quantity = 3,500
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40

WM8737CLGEFL/R

Mfr. #:
Buy WM8737CLGEFL/R
Manufacturer:
Cirrus Logic
Description:
Audio A/D Converter ICs Stereo ADC Low Power
Lifecycle:
New from this manufacturer.
Delivery:
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