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參數(shù)資料
| 型號： | PCM1796DBR |
| 元件分類： | DAC |
| 英文描述： | 24BIT 192 KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER |
| 中文描述： | 24位192千赫采樣高級分段音頻立體聲數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 15/57頁 |
| 文件大?。?/td> | 512K |
| 代理商： | PCM1796DBR |
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SLES100 DECEMBER 2003
www.ti.com
15
Power-On and External Reset Functions
The PCM1796 includes a power-on reset function. Figure 24 shows the operation of this function. With V
DD
> 2 V,
the power-on reset function is enabled. The initialization sequence requires 1024 system clocks from the time
V
DD
> 2 V. After the initialization period, the PCM1796 is set to its default reset state, as described in the
MODE
CONTROL REGISTERS
section of this data sheet.
The PCM1796 also includes an external reset capability using the RST input (pin 14). This allows an external
controller or master reset circuit to force the PCM1796 to initialize to its default reset state.
Figure 25 shows the external reset operation and timing. The RST pin is set to logic 0 for a minimum of 20 ns. The
RST pin is then set to a logic 1 state, thus starting the initialization sequence, which requires 1024 system clock
periods. The external reset is especially useful in applications where there is a delay between the PCM1796 power
up and system clock activation.
Reset
Reset Removal
1024 System Clocks
VDD
2.4 V (Max)
2.0 V (Typ)
1.6 V (Min)
Internal Reset
System Clock
Figure 24. Power-On Reset Timing
Reset
Reset Removal
1024 System Clocks
Internal Reset
System Clock
RST (Pin 14)
t(RST)
1.4 V
PARAMETERS
MIN
20
MAX
UNITS
ns
t(RST)
Reset pulse duration, LOW
Figure 25. External Reset Timing
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| PCM1796DBRG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 bit 192kHz Stereo Audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1798 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-BIT, 192-KHZ SAMPLING ADVANCED SEGMENT, AUDIO STEREO DIGITAL TO ANALOG CONVERTER |
| PCM1798DB | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PCM1798 24-Bit 192kHz Audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1798DB | 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC |
| PCM1798DBG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PCM1798 24-Bit 192kHz Audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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