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參數資料
| 型號： | PCM3000E |
| 元件分類： | Codec |
| 英文描述： | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| 中文描述： | 立體聲音頻編解碼器18位，串行接口商標 |
| 文件頁數： | 15/21頁 |
| 文件大?。?/td> | 212K |
| 代理商： | PCM3000E |
15
PCM3000/3001
SYNCHRONIZATION WITH THE DIGITAL
AUDIO SYSTEM
PCM3000/3001 operates with LRCIN synchronized to the
system clock. The CODEC does not require any specific
phase relationship between LRCIN and the system clock, but
there must be synchronization. If the synchronization be-
tween the system clock and LRCIN changes more than 6 bit
clocks (BCKIN) during one sample (LRCIN) period because
of phase jitter on LRCIN, internal operation of the DAC will
stop within 1/f
S
, and the analog output will be forced to
bipolar zero (V
CC
/2) until the system clock is re-synchronized
to LRCIN. Internal operation of the ADC will also stop with
1/f
S
, and the digital output codes will be set to bipolar zero
until re-synchronization occurs. If LRCIN is synchronized
with 5 or less bit clocks to the system clock, operation will be
normal.
Figure 11 illustrates the effects on the output when synchro-
nization is lost. Before the outputs are forced to bipolar zero
(<1/f
S
seconds), the outputs are not defined and some noise
may occur. During the transitions between normal data and
undefined states, the output has discontinuities, which will
cause output noise.
FIGURE 11. DAC Output and ADC Output When Synchronization is Lost.
FIGURE 10. DAC Output and ADC Output for Reset and Power-Down.
Normal
Normal
Synchronous
Asynchronous
within
1/f
S
Synchronous
Normal
Normal
(1)
ZERO
32/f
S
Undefined Data
Undefined Data
Undefined
Data
VCOM
(= 1/2 x V
CC
2)
22.2/f
S
State of
Synchronization
DAC V
OUT
ADC DOUT
NOTE: (1) The HPF transient response (exponentially attenuationed signal with 200ms time constant) appears initally.
Reset
Internal Reset
DAC V
OUT
ADC DOUT
Zero
VCOM
(= 1/2 x V
CC
2)
32/f
S
4096/f
S
Reset Removal or Power-Down
(1)
OFF
(2)
NOTES: (1) Power-Down is for PCM3000 only. (2) The HPF transient response
(exponentially attenuationed signal with 200ms time constant) appears intially.
相關PDF資料 |
PDF描述 |
|---|---|
| PCM3001 | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| PCM3001E | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| PCM3002E | 16-/20-Bit Single-Ended Analog Input/Output STEREO AUDIO CODECs |
| PCM3003 | 16-/20-Bit Single-Ended Analog Input/Output STEREO AUDIO CODECs |
| PCM3003E | 16-/20-Bit Single-Ended Analog Input/Output STEREO AUDIO CODECs |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PCM3000E | 制造商:Texas Instruments 功能描述:IC's |
| PCM3000E/2K | 功能描述:接口—CODEC SoundPlus Ster Codec 18-bits Ser Intrfc RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量: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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3000E/2KG4 | 功能描述:接口—CODEC SoundPlus Ster Codec 18-bits Ser Intrfc RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量: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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3000EG4 | 功能描述:接口—CODEC SoundPlus Ster Codec 18-bits Ser Intrfc RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量: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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3001 | 制造商:BB 制造商全稱:BB 功能描述:Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
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