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參數資料
| 型號： | PCM4104 |
| 英文描述： | High-Performance, 24-Bit, 216kHz sampling, Four-channel Audio Digital-to-Analog Converter |
| 中文描述： | 高性能24位，216kHz的采樣，四通道音頻數字模擬轉換器 |
| 文件頁數： | 23/36頁 |
| 文件大?。?/td> | 486K |
| 代理商： | PCM4104 |
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SBAS291C AUGUST 2003 REVISED DECEMBER 2004
www.ti.com
23
STANDALONE MODE CONFIGURATION
Standalone mode is selected by forcing the MODE input
(pin 8) low. Standalone mode operation provides a subset
of the functions available in Software mode, while
providing an option for a simplified control model.
Standalone configuration is accomplished by either
hardwiring or driving a small set of input pins with external
logic or switches. Standalone mode functions include
sampling mode and audio data format selection, an
all-channel soft mute function, and digital de-emphasis
filtering. The following paragraphs provide a brief
description of each function available when using
Standalone mode.
Sampling Mode
The sampling mode is selected using the FS0 (pin 28) and
FS1 (pin 29) inputs. A more detailed discussion of the
sampling modes was provided in an earlier section of this
data sheet. Table 2 summarizes the sampling mode
configuration for Standalone mode.
Table 2. Sampling Mode Configuration
FS1
FS0
SAMPLING MODE
0
0
Single Rate
0
1
Dual Rate
1
0
Quad Rate
1
1
Not Used
Audio Data Format
The audio data format is selected using the FMT0 (pin 25),
FMT1 (pin 26), and FMT2 (pin 27) inputs. A detailed
discussion of the audio serial port operation and the
corresponding data formats was provided in the Audio
Serial Port section on page 19. For Standalone mode, the
LRCK polarity is always normal, while the serial audio data
is always sampled on the rising edge of the BCK clock.
Table 3 shows the audio data format configuration for
Standalone mode.
Table 3. Audio Data Format Configuration
FMT2
0
FMT1
0
FMT0
0
AUDIO DATA FORMAT
24-bit left justified
24-bit I2S
0
0
1
0
1
0
TDM with zero BCK delay
0
1
1
TDM with one BCK delay
1
0
0
24-bit right justified
1
0
1
20-bit right justified
1
1
0
18-bit right justified
1
1
1
16-bit right justified
Soft Mute Function
The MUTE input (pin 10) may be used in either the
Standalone or Software modes to simultaneously mute the
four output channels. The soft mute function slowly ramps
the digital output attenuation from its current setting to the
mute level, minimizing or eliminating audible artifacts.
Table 4 summarizes MUTE function operation.
Table 4. Mute Function Configuration
MUTE
ANALOG OUTPUTS
0
On (mute disabled)
1
Muted
Digital De-Emphasis
This is a global digital function (common to all four
channels) and provides de-emphasis of the higher
frequency content within the 20kHz audio band.
De-emphasis is required when the input audio data has
been pre-emphasized. Pre-emphasis entails increasing
the amplitude of the higher frequency components in the
20kHz audio band using a standardized filter function in
order to enhance the high-frequency response. The
PCM4104 de-emphasis filters implement the standard
50/15
μ
s de-emphasis transfer function commonly used in
digital audio applications.
De-emphasis filtering is available for three input sampling
frequencies in Single Rate sampling mode: 32kHz,
44.1kHz, and 48kHz. De-emphasis is not available when
operating in Dual or Quad Rate sampling modes. The
de-emphasis filter is selected using the DEM0 (pin 12) and
DEM1 (pin 11) inputs. Table 5 illustrates the de-emphasis
filter configuration for Standalone mode.
Table 5. Digital De-Emphasis Configuration
DEM1
DEM0
DIGITAL DE-EMPHASIS MODE
0
0
Off (de-emphasis disabled)
0
1
48kHz
1
0
44.1kHz
1
1
32kHz
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相關代理商/技術參數 |
參數描述 |
|---|---|
| PCM4104-EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High-Performance, 24-Bit, 216-kHz Sampling, Four-Channel Audio Digital-to-Analog Converter |
| PCM4104EVM | 功能描述:音頻 IC 開發(fā)工具 PCM4104 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| PCM4104IPFBREP | 功能描述:音頻數/模轉換器 IC Hi-Perf 24B 216 kHz Sampling 4-Ch Audio RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM4104PFBR | 功能描述:音頻數/模轉換器 IC High-End 24-Bit 192kHz 4-Ch D-S DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM4104PFBRG4 | 功能描述:音頻數/模轉換器 IC High-End 24-Bit 192kHz 4-Ch D-S DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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