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參數(shù)資料
| 型號(hào)： | PCM4202DBR |
| 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)： | 18/26頁 |
| 文件大?。?/td> | 342K |
| 代理商： | PCM4202DBR |
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SBAS290B JULY 2003 SEPTEMBER 2004
www.ti.com
18
RESET OPERATION
The PCM4202 includes two reset functions: power-on and
externally controlled. This section describes the operation
of each of these functions.
On power-up, the internal reset signal is forced low, forcing
the PCM4202 into a reset state. The power-on reset circuit
monitors the V
DD
(pin 14) and V
CC
(pin 22) power supplies.
When the V
DD
supply exceeds +2.0V (
±
400mV) and the
V
CC
supply exceeds +4.0V (
±
400mV), the internal reset
signal is forced high. The PCM4202 then waits for the
system clock input (SCKI) to become active. Once the
system clock has been detected, the initialization
sequence begins. The initialization sequence requires
1024 system clock periods for completion. During the
initialization sequence, the ADC output data pins are
forced low. Once the initialization sequence is completed,
the PCM4202 output is enabled. Figure 8 shows the
power-on reset sequence timing.
The user may force a reset initialization sequence at any
time while the system clock input is active by utilizing the
RST input (pin 19). The RST input is active low, and
requires a minimum low pulse width of 40ns. The
low-to-high transition of the applied reset signal forces an
initialization sequence to begin. As in the case of the
power-on reset, the initialization sequence requires 1024
system clock periods for completion. Figure 9 illustrates
the reset sequence initiated when using the RST input.
Figure 10 shows the state of the audio data outputs for the
PCM4202 before, during and after the reset operations.
1024 System Clock Periods
Required for Initialization
System Clock
Indeterminate
or Inactive
SCKI
~ 2.0V
~ 4.0V
0V
0V
0V
0V
Internal
Reset
V
CC
V
DD
Figure 8. Power-On Reset Sequence
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| PCM4204PAPT | HIGH PERFORMANCE 24 BIT 216KHZ SAMPLING FOUR CHANNEL AUDIO ANALOG TO DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(fēng)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(fēng)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(fēng)格: 封裝 / 箱體: 封裝: |
| PCM4202-EP | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High-Performance, 24 Bit, 216 kHz Sampling, Stereo Audio Analog-to-Digital Converte |
| PCM4202EVM | 功能描述:音頻 IC 開發(fā)工具 PCM4202 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
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