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參數(shù)資料
| 型號： | CS42L52-DNZR |
| 廠商： | CIRRUS LOGIC INC |
| 元件分類： | 消費(fèi)家電 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, QCC40 |
| 封裝： | 6 X 6 MM, LEAD FREE, MO-220, QFN-40 |
| 文件頁數(shù)： | 26/59頁 |
| 文件大小： | 1800K |
| 代理商： | CS42L52-DNZR |
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32
DS680F1
CS42L52
5/13/08
4.4
Analog In to Analog Out Passthrough
The CS42L52 accommodates analog routing of the analog input signal directly to the headphone amplifiers.
This feature is useful in applications that utilize an FM tuner where audio recovered over-the-air must be
transmitted to the headphone amplifier without digital conversion in the ADC and DAC. This analog
passthrough path reduces power consumption and is immune to modulator switching noise that could
interfere with some tuners.
4.4.1
Overriding the ADC Power Down
To accommodate automatic activation of the speaker amplifier when the SPK/HP_SW switch pin chang-
es, the CS42L52 provides the option to automatically power up the ADC whenever the analog signal must
route to the digital PWM modulator, regardless of the PDN_ADC bit. Refer to the table below for details
on how this ADC power-down override functions in accordance with the state of the speaker channels.
The shaded cells represent normal ADC operation when passthrough is disabled.
When PASSTHRU and PDN_OVRD are enabled, turning the speaker channel ON (by writing ‘11’b to
SPKx_PDN[1:0] or by automatic activation of the headphone detect switch, SPK/HP_SW) will automati-
cally disable the ADCx_PDN in order to convert the analog input to a digital signal for the PWM modulator.
This allows automatic analog input routing to the speaker amplifiers.
PDN_ADC
PASSTHRU
PDN_OVRD
Speaker Channel
ADC Status
0
x
Powered UP
1
0
x
Powered DOWN
1
0
x
Powered DOWN
1
OFF
Powered DOWN
ON
Powered UP
MA X [2 :0 ]
Ou tp u t
(a fter Lim ite r)
In p u t
RRA T E [5 :0 ]
ARAT E [5 :0 ]
Vo lu m e
Lim ite r
CU S H [2 :0 ]
AT T A CK /R E L E A S E S O UND
C U S H IO N
MA X [2 :0 ]
Figure 14. Peak Detect & Limiter
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| CS42L55 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Ultra Low Power, Stereo CODEC w/Class H Headphone Amp |
| CS42L55-CNZ | 功能描述:接口—CODEC IC Ultra Low Power Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| CS42L55-CNZR | 功能描述:接口—CODEC IC Ultra Low PWR Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| CS42L55-DNZ | 功能描述:接口—CODEC Portble Stereo CODEC Class H HP Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| CS42L55DNZR | 制造商:Cirrus Logic 功能描述:PORTABLE STEREO CODEC AND UNIQUE CLASS H HP AMP AUTO GRADE & - Tape and Reel |
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