參數(shù)資料
型號： PCM1870
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)： 16/49頁
文件大?。?/td> 648K
代理商： PCM1870
www.ti.com
Audio Serial Interface
Audio Data Formats and Timing
The PCM1870 supports I
2
S, right-justified, left-justified, and DSP formats. The data formats are shown in
Figure 16
, and they are selected using resister 70 (RFM[1:0], PFM[1:0]). All formats require binary
2s-complement, MSB-first audio data. The default format is I
2
S.
Figure 14
shows a detailed timing diagram.
t
w(BCH)
DOUT
t
w(BCL)
t
(LB)
t
(BCY)
LRCK
BCK
50% of V
IO
50% of V
IO
50% of V
IO
t
(CKDO)
t
(LRDO)
T0010-12
t
(BL)
PCM1870
SLAS544–MAY 2007
The audio serial interface of the PCM1870 consists of LRCK, BCK and DOUT. Sampling rate (f
S
), left and right
channel are present on LRCK. DOUT transmits the serial data from the decimation filter for the ADC. BCK is
used to transmit the serial audio data on DOUT at its high-to-low transition. BCK and LRCK should be
synchronized with audio system clock. Ideally, it is recommended that they are derived from it.
The PCM1870 requires LRCK to be synchronized with the system clock. The PCM1870 do not need a specific
phase relationship between LRCK and the system clock.
The PCM1870 has both master mode and slave mode interface formats, which can be selected by register 84
(MSTR). LRCK and BCK are generated from the system clock in master mode.
PARAMETERS
SYMBOL
t
(BCY)
t
(BCY)
t
w(BCH)
t
w(BCL)
t
(BL)
t
(LB)
t
(CKDO)
MIN
MAX
UNIT
BCK pulse cycle time (I
2
S, left- and right-justified formats)
BCK pulse cycle time (DSP format)
BCK high-level time
BCK low-level time
BCK rising edge to LRCK edge
LRCK edge to BCK rising edge
DOUT delay time from BCK falling edge
1/(64f
S
)
(1)
1/(256f
S
)
(1)
35
35
10
10
ns
ns
ns
ns
ns
40
(1)
f
S
is the sampling frequency.
Figure 14. Audio Interface Timing (Slave Mode)
16
Submit Documentation Feedback
相關(guān)PDF資料
PDF描述
PCM1870RHFR 16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
PCM1870RHFT 16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
PCM2904 STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF
PCM2904DB STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF
PCM2904DBR STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1870AYZFR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low Power Stereo Audio ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
PCM1870AYZFT 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC Low Power Stereo Audio 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:
PCM1870RHFR 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:
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:
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*