參數(shù)資料
型號： PCM1870RHFR
英文描述： 16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
中文描述： 16位低功耗立體聲音頻ADC，具有麥克風(fēng)偏置和麥克風(fēng)放大器
文件頁數(shù)： 27/49頁
文件大?。?/td> 648K
代理商： PCM1870RHFR
www.ti.com
PCM1870
SLAS544–MAY 2007
Register 81
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 81
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
HPF1
HPF0
RMUL RMUR
RSV
DSMC
RFM1
RFM0
IDX[6:0]:
101 0001b (51h) Register 81
HPF[1:0]: High-Pass Filter Selection
Default value: 00
The PCM1870 has a digital high-pass filter to remove dc voltage at the input of the ADC. The cutoff frequency of
the high-pass filter can be selected.
HPF[1:0]
0 0
0 1
1 0
1 1
High Pass Filter Selection
f
C
= 4 Hz at 48 kHz (default)
f
C
= 240 Hz at 48 kHz
f
C
= 120 Hz at 48 kHz
High-pass filter disabled
RMUL: Digital Soft Mute Control for ADC L-Channel
RMUR: Digital Soft Mute Control for ADC R-Channel
Default value: 1
The digital output of the ADC can be independently muted or unmuted. The transition from the current volume
level to mute, or the return to the previous volume setting from mute, occurs at the rate of one 1-dB step for
each 8/f
S
time period. When RMUL and RMUR = 0, the digital data is increased from mute to the previous
attenuation level, and when RMUL and RMUR = 1, the digital data is decreased from the current attenuation
level to mute. In the PCM1870, audible zipper noise can be reduced by using zero-cross detection (register 85,
ZCRS).
RMUL, RMUR = 0
RMUL, RMUR = 1
Mute disabled
Mute enabled (default)
DSMC: Waiting Time Turn ADC Mute Off at Power Up
Default value: 0
ADC digital output has waiting time at power up when DSMC = 0. It is recommended to set DSMC = 0.
DSMC = 0
DSMC = 1
10 ms at 48 kHz (default)
No wait
RFM[1:0]: Audio Interface Selection for ADC (Digital Output)
Default value: 00
The audio interface format for ADC digital output has I
2
S, right-justified, left-justified, and DSP formats.
RFM[1:0]
0 0
0 1
1 0
1 1
Audio Interface Selection for ADC Digital Output
I
2
S (default)
Right-justified
Left-justified
DSP mode
27
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PCM1870RHFRG4 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC Low Pwr St Aud ADC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM1870RHFT 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC Lo Pwr Stereo Audio RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM1870RHFTG4 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC Low Pwr St Aud ADC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM1870YZFR 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC Low Pwr St Aud ADC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
PCM1870YZFT 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC Low Pwr St Aud ADC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換速率: 分辨率: ADC 輸入端數(shù)量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: 封裝:
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