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參數(shù)資料
| 型號： | PCM1772RGA |
| 元件分類： | DAC |
| 英文描述： | LOW VOLTAGE AND LOW POWER STEREO AUDIO DIGITAL TO ANALOG CONVERTER WITH LINEOUT AMPIIFIER |
| 中文描述： | 低電壓和低功耗立體聲音頻數(shù)模轉(zhuǎn)換器與線路輸出AMPIIFIER |
| 文件頁數(shù)： | 14/29頁 |
| 文件大小： | 309K |
| 代理商： | PCM1772RGA |
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SLES010D – SEPTEMBER 2001 – REVISED MAY 2004
www.ti.com
14
POWER ON/OFF AND RESET
The PCM1772/73 always must have the PD pin set from LOW to HIGH once after power-supply voltages V
CC1
and V
CC2
have reached the specified voltage range and stable clocks SCKI, BCK, and LRCK are being supplied for the power-on
sequence. A minimum time of 1 ms after both the clock and power-supply requirements are met is required before the PD
pin changes from LOW to HIGH, as shown in Figure 19. Subsequent to the PD LOW-to-HIGH transition, the internal logic
state is held in reset for 1024 system clock cycles prior to the start of the power-on sequence. During the power-on
sequence, V
OUT
L and V
OUT
R increase gradually from ground level, reaching an output level that corresponds to the input
data after a period of 9334/f
S
. When powering off, the PD pin is set from HIGH to LOW first. Then V
OUT
L and V
OUT
R
decrease gradually to ground level over a period of 9334/f
S
, as shown in Figure 20, after which power can be removed
without creating pop noise. When powering on or off, adhering to the timing requirements of Figure 19 and Figure 20
ensures that pop noise does not occur. If the timing requirements are not met, pop noise might occur.
VCC1, VCC2
0 V
LRCK, BCK, SCKI
PD
Internal Reset
VOUTL, VOUTR
1024 Internal System Clocks
9334/fS
0 V
1 ms (Min)
1 ms (Min)
Figure 19. Power-On Sequence
VCC1, VCC2
0 V
LRCK, BCK, SCKI
PD
VOUTL, VOUTR
0 V
9334/fS
Figure 20. Power-Off Sequence
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| PCM1772RGAG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Lo-Vlt & Lo-Pwr Ster DAC w/Lineout Amp 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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| PCM1772RGARG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Lo-Vlt & Lo-Pwr Ster DAC w/Lineout Amp 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1773 | 制造商:BB 制造商全稱:BB 功能描述:LOW VOLTAGE AND LOW POWER STEREO AUDIO DIGITAL TO ANALOG CONVERTER WITH LINEOUT AMPIIFIER |
| PCM1773PW | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Lo-Vlt & Lo-Pwr Ster DAC w/Lineout Amp 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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