參數(shù)資料
型號(hào)： PCM1796DB
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(jí)分段音頻立體聲數(shù)模轉(zhuǎn)換器
文件頁(yè)數(shù)： 14/57頁(yè)
文件大?。?/td> 512K
代理商： PCM1796DB
SLES100 DECEMBER 2003
www.ti.com
14
SYSTEM CLOCK AND RESET FUNCTIONS
System Clock Input
The PCM1796 requires a system clock for operating the digital interpolation filters and advanced segment DAC
modulators. The system clock is applied at the SCK input (pin 7). The PCM1796 has a system clock detection circuit
that automatically senses the frequency at which the system clock is operating. Table 1 shows examples of system
clock frequencies for common audio sampling rates. If the oversampling rate of the delta-sigma modulator is selected
as 128 f
S
, the system clock frequency is required to be over 256 f
S
.
Figure 23 shows the timing requirements for the system clock input. For optimal performance, it is important to use
a clock source with low phase jitter and noise. One of the Texas Instruments PLL1700 family of multiclock generators
is an excellent choice for providing the PCM1796 system clock.
Table 1. System Clock Rates for Common Audio Sampling Frequencies
SAMPLING FREQUENCY
SYSTEM CLOCK FREQUENCY (fSCK) (MHz)
256 fS
6.144(1)
8.192
128 fS
4.096(1)
5.6488(1)
6.144(1)
192 fS
384 fS
12.288
512 fS
16.384
768 fS
24.576
32 kHz
44.1 kHz
8.4672
11.2896
16.9344
22.5792
33.8688
48 kHz
9.216
12.288
18.432
24.576
49.152(1)
—(2)
36.864
73.728(1)
—(2)
96 kHz
12.288
18.432
24.576
49.152(1)
36.864
73.728(1)
192 kHz
24.576
36.864
(1)This system clock rate is not supported in I2C fast mode.
(2)This system clock rate is not supported for the given sampling frequency.
t(SCKH)
t(SCY)
System Clock (SCK)
t(SCKL)
2.0 V
0.8 V
H
L
PARAMETERS
MIN
MAX
UNITS
t(SCY)
t(SCKH)
t(SCKL)
System clock pulse cycle time
13
ns
System clock pulse duration, HIGH
0.4 (SCY)
0.4 (SCY)
ns
System clock pulse duration, LOW
ns
Figure 23. System Clock Input Timing
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1796DB 制造商:Texas Instruments 功能描述:24BIT AUDIO DAC SMD 1796 SSOP28
PCM1796DBG4 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
PCM1796DBR 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
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
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