參數(shù)資料
型號(hào)： PCM1794ADB
英文描述： 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter
中文描述： 24位,192 - kHz的采樣，先進(jìn)的部分，立體聲音頻數(shù)字模擬轉(zhuǎn)換器
文件頁(yè)數(shù)： 15/30頁(yè)
文件大小： 301K
代理商： PCM1794ADB
SLES117A – AUGUST 2004 – REVISED NOVEMBER 2006
www.ti.com
15
AUDIO DATA INTERFACE
Audio Serial Interface
The audio interface port is a 3-wire serial port. It includes LRCK (pin 4), BCK (pin 6), and DATA (pin 5). BCK is the
serial audio bit clock, and it is used to clock the serial data present on DATA into the serial shift register of the audio
interface. Serial data is clocked into the PCM1794A on the rising edge of BCK. LRCK is the serial audio left/right word
clock.
The PCM1794A requires the synchronization of LRCK and the system clock, but does not need a specific phase
relation between LRCK and the system clock.
If the relationship between LRCK and the system clock changes more than
±
6 BCK, internal operation is initialized
within 1/f
S
and the analog outputs are forced to the bipolar zero level until resynchronization between LRCK and the
system clock is completed.
PCM Audio Data Formats and Timing
The PCM1794A supports industry-standard audio data formats, including standard right-justified, I
2
S, and
left-justified. The data formats are shown in Figure 22. Data formats are selected using the format bits,
FMT1 (pin 12), and FMT0 (pin 11) as shown in Table 2. All formats require binary twos-complement, MSB-first audio
data. Figure 21 shows a detailed timing diagram for the serial audio interface.
DATA
t(BCH)
50% of VDD
BCK
LRCK
t(BCL)
t(LB)
t(BCY)
t(DS)
t(DH)
50% of VDD
50% of VDD
t(BL)
PARAMETERS
MIN
70
MAX
UNITS
ns
t(BCY)
t(BCL)
t(BCH)
t(BL)
t(LB)
t(DS)
t(DH)
—
BCK pulse cycle time
BCK pulse duration, LOW
30
ns
BCK pulse duration, HIGH
30
ns
BCK rising edge to LRCK edge
10
ns
LRCK edge to BCK rising edge
10
ns
DATA setup time
10
ns
DATA hold time
10
50%
±
2 bit clocks
ns
LRCK clock duty
Figure 21. Timing of Audio Interface
相關(guān)PDF資料
PDF描述
PCM1794ADBR 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter
PCM1794A 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter
PCM1794ADBRG4 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter
PCM1794ADBG4 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter
PCM1796DB 24BIT 192 KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1794ADB 制造商:Texas Instruments 功能描述:IC DAC AUDIO 24BIT 192KHZ 28SSOP 制造商:Texas Instruments 功能描述:IC, DAC AUDIO 24BIT 192KHZ 28SSOP 制造商:Texas Instruments 功能描述:IC, DAC AUDIO 24BIT 192KHZ 28SSOP; Resolution (Bits):24bit; Sampling Rate:192kSPS; Input Channel Type:Serial; Supply Voltage Range:4.75V to 5.25V; Digital IC Case Style:SSOP; No. of Pins:28; Data Interface:3 Wire, Serial; Supply ;RoHS Compliant: Yes
PCM1794ADBG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 192 kHz 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
PCM1794ADBR 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192 kHz 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
PCM1794ADBRG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192 kHz 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
PCM1794AQDBRQ1 功能描述:DAC, Audio 24 bit 192k I2S, PCM 28-SSOP 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:DAC，音頻 分辨率（位）:24 b 采樣率（每秒）:192k 數(shù)據(jù)接口:I2S，PCM 電壓源:模擬和數(shù)字 電壓 - 電源:3 V ~ 3.6 V，5V 工作溫度:-25°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商器件封裝:28-SSOP 標(biāo)準(zhǔn)包裝:1
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