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參數(shù)資料
| 型號： | PCM4202DB |
| 英文描述： | High-Performance 24-Bit, 216kHz Sampling Stereo Audio Analog-to-Digital Converter |
| 中文描述： | 高性能24位，216kHz的采樣立體聲音頻模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 14/26頁 |
| 文件大?。?/td> | 342K |
| 代理商： | PCM4202DB |
SBAS290B JULY 2003 SEPTEMBER 2004
www.ti.com
14
SCKI
t
SCKI
t
SCKIH
t
SCKIL
PARAMETER
DESCRIPTION
MIN
MAX
UNITS
System Clock Period
26
ns
t
SCKIH
System Clock High Pulse Time
12
ns
t
SCKIL
System Clock Low Pulse Time
12
ns
t
SCKI
Figure 2. System Clock Timing Requirements
SAMPLING MODES
The PCM4202 may be operated in one of three PCM
sampling modes, or at one of two DSD output data rates.
The PCM sampling modes are referred to as Single Rate,
Dual Rate, and Quad Rate.
Single Rate mode is utilized for sampling rates up to
54kHz. The delta-sigma modulator oversamples the
analog input signal by a rate equal to 128 times the desired
output sampling rate.
Dual Rate mode is utilized for sampling rates higher than
54kHz and up to 108kHz. The delta-sigma modulator
oversamples the analog input signal by a rate equal to 64
times the desired output sampling rate.
Quad Rate mode is utilized for sampling frequencies
higher than 108kHz and up to 216kHz. The delta-sigma
modulator oversamples the analog input signal by a rate
equal to 32 times the desired output sampling rate.
For DSD output data, the user may select either 64f
S
or
128f
S
oversampled data rates, where f
S
is the base
sampling rate, which is 44.1kHz for Super Audio CD
(SACD) applications. The 64f
S
data rate is analogous to
the Dual Rate PCM sampling mode, where the analog
input signal is oversampled by a rate equal to 64 times the
base sampling rate. The 128f
S
data rate corresponds to
the Single Rate PCM sampling mode, where the analog
input signal is oversampled by a rate equal to 128 times the
base sampling rate.
Table 1 indicates the sampling mode utilized for common
system clock and sampling rate combinations. The FS0
(pin 9), FS1 (pin 10), and FS2 (pin 11) inputs are utilized
to select the sampling mode for the PCM4202. If the state
of the sampling mode pins is changed any time after
power-up reset initialization, the user should issue an
external forced reset to re-initialize the PCM4202. Table 2,
Table 3, and Table 4 indicate the sampling mode
selections for PCM Master and Slave mode operation, as
well as the DSD Output mode.
Table 2. Sampling Mode Selection for PCM
Master Mode Operation
FS2
FS1
FS0
SAMPLING MODE WITH
SYSTEM CLOCK RATE
0
0
0
Single Rate with fSCKI = 768fS
Single Rate with fSCKI = 512fS
Single Rate with fSCKI = 384fS
Single Rate with fSCKI = 256fS
Dual Rate with fSCKI = 384fS
Dual Rate with fSCKI = 256fS
Quad Rate with fSCKI = 192fS
Quad Rate with fSCKI = 128fS
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Table 3. Sampling Mode Selection for PCM Slave
Mode Operation
FS2
0
FS1
0
FS0
0
SAMPLING MODE
Single Rate with Clock Auto-Detection
0
0
1
Dual Rate with Clock Auto-Detection
0
1
0
Quad Rate with Clock Auto-Detection
0
1
1
Reserved
1
0
0
Reserved
1
0
1
Reserved
1
1
0
Reserved
1
1
1
Reserved
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| PCM4202DBG4 | 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24-Bit/192kHz 118dB Stereo Audio A/D 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: 安裝風格: 封裝 / 箱體: 封裝: |
| PCM4202DBR | 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24-Bit/192kHz 118dB Stereo Audio A/D 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: 安裝風格: 封裝 / 箱體: 封裝: |
| PCM4202DBRG4 | 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24-Bit/192kHz 118dB Stereo Audio A/D 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: 安裝風格: 封裝 / 箱體: 封裝: |
| PCM4202DBT | 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24-Bit/192kHz 118dB Stereo Audio A/D 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: 安裝風格: 封裝 / 箱體: 封裝: |
| PCM4202DBTG4 | 功能描述:音頻模/數(shù)轉(zhuǎn)換器 IC 24-Bit/192kHz 118dB Stereo Audio A/D 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: 安裝風格: 封裝 / 箱體: 封裝: |
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