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WM8974CGEFL/V PDF预览

WM8974CGEFL/V

更新时间： 2024-09-18 15:57:59
品牌 Logo 应用领域
凌云 - CIRRUS PC电信电信集成电路
页数 文件大小 规格书
89页 1769K
描述
PCM Codec, A/MU-Law, 1-Func, CMOS, PQCC24, QFN-24

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WM8974CGEFL/V 技术参数

是否Rohs认证： 符合生命周期：Active
包装说明：QFN-24Reach Compliance Code：compliant
HTS代码：8542.39.00.01风险等级：1.1
其他特性：IT ALSO OPERATES AT 2.5V TO 3.6V ANALOG SUPPLY压伸定律：A/MU-LAW
滤波器：YESJESD-30 代码：S-PQCC-N24
长度：4 mm功能数量：1
端子数量：24工作模式：SYNCHRONOUS
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
座面最大高度：0.9 mm标称供电电压：1.8 V
表面贴装：YES技术：CMOS
电信集成电路类型：PCM CODEC温度等级：INDUSTRIAL
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD宽度：4 mm
Base Number Matches：1

WM8974CGEFL/V 数据手册

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WM8974  
Mono CODEC with Speaker Driver  
DESCRIPTION  
FEATURES  
Mono CODEC:  
The WM8974 is a low power, high quality mono CODEC  
designed for portable applications such as Digital Still Camera  
or Digital Voice Recorder.  
Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1, 48kHz  
DAC SNR 98dB, THD -84dB (‘A’-weighted @ 8 – 48ks/s)  
ADC SNR 94dB, THD -83dB (‘A’-weighted @ 8 – 48ks/s)  
On-chip Headphone/Speaker Driver with ‘cap-less’ connect  
The device integrates support for a differential or single ended  
mic, and includes drivers for speakers or headphone, and  
mono line output. External component requirements are  
reduced as no separate microphone or headphone amplifiers  
are required.  
-
-
40mW output power into 16/ 3.3V SPKVDD  
BTL speaker drive 0.9W into 8/ 5V SPKVDD  
Additional MONO Line output  
Multiple analogue or ‘Aux’ inputs, plus analogue bypass path  
Mic Preamps:  
Advanced Sigma Delta Converters are used along with digital  
decimation and interpolation filters to give high quality audio at  
sample rates from 8 to 48ks/s. Additional digital filtering  
options are available in the ADC path, to cater for application  
filtering such as ‘wind noise reduction’, plus an advanced  
mixed signal ALC function with noise gate is provided. The  
digital audio interface supports A-law and -law companding.  
Differential or single end Microphone Interface  
-
-
-
Programmable preamp gain  
Psuedo-differential inputs with common mode rejection  
Programmable ALC / Noise Gate in ADC path  
Low-noise bias supplied for electret microphones  
OTHER FEATURES  
5 band EQ (record or playback path)  
Digital Playback Limiter  
Programmable ADC High-Pass Filter (wind noise reduction)  
Programmable ADC Notch Filter  
On-chip PLL  
An on-chip PLL is provided to generate the required Master  
Clock from an external reference clock. The PLL clock can  
also be output if required elsewhere in the system.  
The WM8974 operates at supply voltages from 2.5 to 3.6V,  
although the digital supplies can operate at voltages down to  
1.71V to save power. The speaker and mono outputs use a  
separate supply of up to 5V which enables increased output  
power if required. Different sections of the chip can also be  
powered down under software control by way of the selectable  
two or three wire control interface.  
Low power, low voltage  
-
-
2.5V to 3.6V (digital: 1.71V to 3.6V)  
power consumption <10mA all-on 48ks/s mode  
4x4x0.9mm 24 lead QFN package  
APPLICATIONS  
Digital Still Camera Audio CODEC  
Wireless VoIP and other communication handsets / headsets  
Portable audio recorder  
WM8974 is supplied in a very small 4x4mm QFN package,  
offering high levels of functionality in minimum board area, with  
high thermal performance.  
General Purpose low power audio CODEC  
analog  
inputs  
DCVDD DBVDD DGND  
AUX  
SPKGND  
SPKVDD  
20k  
WM8974  
20k  
ADC  
DIGITAL  
FILTERS  
DAC  
DIGITAL  
FILTERS  
Gains:  
-12dB to +35.25dB  
NOISY  
GND  
Volume  
MICN  
Volume  
5 Band EQ  
ADC  
DAC  
MONOOUT  
SPKOUTP  
5 Band EQ  
Digital Limiter  
Limiter / ALC  
Mic  
IP PGA  
IP BOOST/MIX  
Wind Noise  
Filter  
MICP  
Notch Filter  
0dB,  
-10dB  
0dB,  
-10dB  
Rbias  
-1  
BYPASS  
L - (-R)  
= L+R  
SPKOUTN  
I2S or PCM  
INTERFACE  
CONTROL  
INTERFACE  
SPKR PGA  
MICBIAS  
PLL  
50k  
500k  
50k  
A-law and u-law support  
4k  
5k  
500k  
Rev 4.7  
AUG ‘16  
Copyright Cirrus Logic, Inc., 2004–2016  
http://www.cirrus.com  
(All Rights Reserved)  
1234567...89

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