- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367828 > PCM1870RHFT 16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier PDF資料下載
參數(shù)資料
| 型號： | PCM1870RHFT |
| 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)： | 13/49頁 |
| 文件大小： | 648K |
| 代理商： | PCM1870RHFT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁當(dāng)前第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁
www.ti.com
DESCRIPTION OF OPERATION
System Clock Input
t
w(SCKH)
SCKI
t
w(SCKL)
0.7 V
IO
0.3 V
IO
T0005-12
Power-On Reset and System Reset
Power On/Off Sequence
PCM1870
SLAS544–MAY 2007
The PCM1870 can accept input clocks of various frequencies without a PLL. The clocks are used for clocking of
the digital filters, auto level control, and delta-sigma modulators, and classified into common-audio and
application-specific clocks.
Table 2
shows frequencies of the common audio clock and the application-specific
clock.
Figure 13
shows timing requirements for system clock inputs. The sampling rate and frequency of the
system clock are determined by settings in register 86 (MSR[2:0]) and register 85 (NPR[5:0]). Note that the
sampling rate of the application-specific clock has a little sampling error. The details are shown in
Table 8
.
Table 2. Frequency of Common Audio Clock
FREQUENCY
Common audio clock
Application-specific clock
11.2896, 12.288, 16.9344, 18.432 MHz
12, 13, 13.5, 24, 26, 27, 19.2, 19.68, 38.4, 39.36 MHz
PARAMETERS
SYMBOL
t
w(SCKH)
t
w(SCKL)
MIN
14
14
UNIT
ns
ns
System clock pulse duration, high
System clock pulse duration, low
Figure 13. System Clock Timing
The power-on-reset circuit outputs reset signal, typically at V
DD
= 1.2 V, and this circuit does not depend on the
voltage of other power-supplies (V
CC
, V
PA
, and V
IO
). Internal circuits are cleared to default status, then signals
are removed from all analog and digital outputs. The PCM1870 does not require any power supply sequencing.
Register data must be written after turning all power supplies on.
System reset is enabled by setting register 85 (SRST), and all registers are cleared automatically. All circuits are
reset to their default status at once. Note that the PCM1870 has audible pop noise on the analog outputs when
enabling SRST.
To reduce audible pop noise, a sequence of register settings is required after turning all power supplies on when
powering up, or before turning the power supplies off when powering down. If some modules are not required for
a particular application or operation, they should be placed in the power-down state after performing the
power-on sequence. The recommended power-on and power-off sequences are shown in
Table 3
and
Table 4
,
respectively.
13
Submit Documentation Feedback
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| PCM2906 | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
| PCM2906DB | 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 |
|---|---|
| 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: |
| PCM-188 | 功能描述:電線鑒定 Pre-Printed WM Card, Vinyl Cloth, .22" W RoHS:否 制造商:TE Connectivity / Q-Cees 產(chǎn)品:Labels and Signs 類型: 材料:Vinyl 顏色:Blue 寬度:0.625 in 長度:1 in |
| PCM-189 | 功能描述:電線鑒定 Pre-Printed WM Card, Vinyl Cloth, .22" W RoHS:否 制造商:TE Connectivity / Q-Cees 產(chǎn)品:Labels and Signs 類型: 材料:Vinyl 顏色:Blue 寬度:0.625 in 長度:1 in |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。