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參數(shù)資料
| 型號： | PCM3052ARTFR |
| 元件分類： | Codec |
| 英文描述： | 24-BIT, 96-kHz STEREO AUDIO CODEC WITH MICROPHONE AMPLIFIER, BIAS, MUXTIPLEXER, AND PGA |
| 中文描述： | 24位，96千赫立體聲音頻編解碼器麥克風(fēng)放大器，偏見，MUXTIPLEXER，和PGA |
| 文件頁數(shù)： | 27/45頁 |
| 文件大小： | 583K |
| 代理商： | PCM3052ARTFR |
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SYNCHRONIZATION WITH DIGITAL AUDIO SYSTEM
The PCM3052A operates with LRCK and BCK synchronized to the system clock in slave mode. The PCM3052A
does not need specific phase relationship among LRCK, BCK, and the system clock, but does require the
synchronization of LRCK, BCK, and the system clock.
If the relationship between system clock and LRCK changes more than
±
6 BCKs during one sample period due
to LRCK jitter, etc., internal operation of DAC halts within 6/f
S
, and the analog output is forced to 0.5 V
CC
2 until
re-synchronization of the system clock to LRCK and BCK has completed and then the time of t
(DACDLY2)
has
elapsed.
Within 6/f
S
t
(DACDLY2)
(32/f
S
)
V
COM
Normal Data
(0.5 V
CC
2)
Undefined
Data
Normal Data
Synchronous
Asynchronous
Synchronous
Resynchronization
Synchronization Lost
DAC V
OUT
State of Synchronization
Normal Data
Zero Data
Normal Data
ADC DOUT
t
(ADCDLY2)
(32/f
S
)
Undefined
Data
T0020-07
Normal Data
Low
Normal Data
DOUTS
Undefined
Data
MICROPHONE AMPLIFIER AND MICROPHONE BIAS GENERATOR
The PCM3052A has a built-in, high-performance differential-input microphone amplifier with 34-dB gain, 5-k
(minimum) input resistance, and 59-dB SNR at 100-mVrms output. Bandwidth is 20 kHz for –3-dB attenuation.
The PCM3052A also has a low-noise microphone bias generator with 0.75-V
CC
1 and 1-mA current-source
capability for electret microphones. Output impedance is 48
for external noise reduction. The output of the
microphone amplifier and the line input are connected as inputs to the multiplexer. The serial control port can be
used to control which input the multiplexer selects (see
Figure 50
).
PCM3052A
SLES160–NOVEMBER 2005
DOUTS is also held LOW during the same period.
Internal operation of the ADC also halts within 6/f
S
, and digital output is forced into ZERO code until
re-synchronization of the system clock to LRCK and BCK has completed and then the time of t
(ADCDLY2)
has
elapsed.
In case of changes less than
±
5 BCKs, re-synchronization does not occur and the previously described
analog/digital output control and discontinuity does not occur.
Figure 48
illustrates the DAC analog output, ADC digital output, and DOUTS output for loss of synchronization.
During undefined data, the PCM3052A can generate some noise in audio signal. Also, the transition of normal to
undefined data and undefined or zero data to normal creates a discontinuity of data on analog and digital
outputs, which could generate some noise in audio signal.
Figure 48. DAC Output and ADC Output for Loss of Synchronization
27
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| PCM3052ARTFRG4 | 24-BIT, 96-kHz STEREO AUDIO CODEC WITH MICROPHONE AMPLIFIER, BIAS, MUXTIPLEXER, AND PGA |
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| PCM3501E | Low Voltage, Low Power, 16-Bit, Mono VOICE/MODEM CODEC |
| PCM3793RHBT | 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM3052ARTFRG4 | 功能描述:接口—CODEC 24B Stereo Audo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3052RTFR | 制造商:Texas Instruments 功能描述: |
| PCM3060 | 制造商:BB 制造商全稱:BB 功能描述:24-BIT, 96/192-kHz ASYNCHRONOUS STEREO AUDIO CODEC |
| PCM3060PW | 功能描述:接口—CODEC 24B 96/192kHz Asynchronous Stereo RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3060PW | 制造商:Texas Instruments 功能描述:LEADED PROCESS COMPATIBLE:YES |
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