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| 型號： | PCM3794ARHBR |
| 元件分類： | Codec |
| 英文描述： | 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier |
| 中文描述： | 16位，低功耗立體聲音頻編解碼器麥克風偏置，耳機，揚聲器放大器和數(shù)字 |
| 文件頁數(shù)： | 19/68頁 |
| 文件大小： | 982K |
| 代理商： | PCM3794ARHBR |
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Digital Monaural Mixing
Zero-Cross Detection
Short Protection
Thermal Protection
Pop-Noise Reduction Circuit
Power Up/Down for Each Module
Digital Audio Interface
The PCM3793A/94A can receive I
2
S, right-justified, left-justified, and DSP formats in both master and slave
modes. These options can be selected in register 70 (PFM[1:0]), register 81 (RFM[1:0]) and register 84 (MSTR).
Digital Interface
Power Supply
PCM3793A
PCM3794A
SLAS529A–JANUARY 2007–REVISED FEBRUARY 2007
The audio data can be converted from stereo digital data to mixed monaural digital data. The conversion occurs
in the internal audio interface section and is controlled by register 96 (MXEN).
Zero-cross detection minimizes audible zipper noise while changing analog volume and digital attenuation. This
function applies to the digital input or digital output as defined by register 86 (ZCRS).
The short-circuit protection on each headphone output prevents damage to the device while an output is shorted
to V
PA
, an output is shorted to PGND, or any two outputs are shorted together. When the short circuit is detected
on the outputs, the PCM3793A/94A powers down the shorted amplifier immediately. The short-protection status
can be monitored by reading register 77 (STHC, STHL, SCHR) through the I
2
C interface. Short-circuit protection
operates in any enabled headphone amplifier.
The thermal protection on the speaker amplifier prevents damage to the device when the internal die
temperature exceeds approximately 150
°
C. Once the die temperature exceeds the thermal set point, all analog
outputs are powered down. This status can be reset by setting register 76 (RLSR, RLSL) and can be watched
by reading register 77 (STSR, STSL) through the two-wire (I
2
C) interface. Thermal protection operates in any
enabled speaker amplifier.
The pop-noise reduction circuit prevents audible noise when turning the power supply on/off and powering the
device up/down in portable applications. It is recommended to establish the register settings in the sequence
that is shown in
Table 3
and
Table 4
. No particular external parts are required.
Using register 72 (PMXL, PMXR), register 73 (PBIS, PDAR, PDAL, PHPC, PHPR, PHPL, PSPR, PSPL), register
82 (PAIR, PAIL, PADS, PMCB, PADR, PADL), and register 90 (PCOM), unused modules can be powered down
to minimize power consumption (7 mW during playback only and 13 mW when recording only).
All digital I/O pins can interface at various power supply voltages. V
IO
pin can be connected to a 1.71-V to 3.6-V
power supply.
The V
CC
pin and the V
PA
pin can be connected to 2.4 V to 3.6 V. The same voltage must be applied to both pins.
The V
pin and the V
pin can be connected to 1.71 V to 3.6 V. A different voltage can be applied to each of
these pins (for example, V
DD
= 1.8 V, V
IO
= 3.3 V).
19
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PCM3794ARHBRG4 | 功能描述:接口—CODEC 16B Low Pwr Stereo Audio CODEC 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(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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3794ARHBT | 功能描述:接口—CODEC 16B Lo Pwr St Audio CODEC 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(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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3794ARHBTG4 | 功能描述:接口—CODEC 16B Low Pwr Stereo Audio CODEC 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(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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| PCM3794RHB | 制造商:Texas Instruments 功能描述: |
| PCM3794RHBR | 功能描述:接口—CODEC Very Low-Pwr Stereo CODEC 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(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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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