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參數(shù)資料
| 型號(hào)： | PCM1744 |
| 英文描述： | 24 Bits, 96kHz, Sampling Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 24位，96kHz的，采樣的立體聲音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 83K |
| 代理商： | PCM1744 |
7
PCM1744
than
±
6 bit clocks (BCKIN), the synchronization is per-
formed automatically. The analog outputs are forced to a
bipolar zero state (V
CC
/2) during the synchronization func-
tion. Table I shows the typical system clock frequency
inputs for the PCM1744.
SYSTEM CLOCK
FREQUENCY (MHz)
256f
S
384f
S
32kHz
44.1kHz
48kHz
88.2kHz
96kHz
8.192
11.2896
12.288
22.5792
24.576
12.288
16.9340
18.432
33.868
36.864
SAMPLING
RATE (LRCIN)
TABLE I. System Clock Frequencies vs Sampling Rate.
TYPICAL CONNECTION DIAGRAM
Figure 4 illustrates the typical connection diagram for
PCM1744 used in a stand-alone application.
INPUT DATA FORMAT
PCM1744 can accept input data a 24-bit I
2
S format, as
shown in Figure 1.
FIGURE 5. Internal Power-On Reset Timing.
FIGURE 4. Typical Connection Diagram.
RESET
PCM1744 has an internal power-on reset circuit. The internal
power-on reset initializes (resets) when the supply voltage
V
CC
> 2.2V (typ). The power-on reset has an initialization
period equal to 1024 system clock periods after V
CC
> 2.2V.
During the initialization period, the outputs of the DAC are
invalid, and the analog outputs are forced to V
CC
/2. Figure 5
illustrates the power-on reset and reset-pin reset timing.
DE-EMPHASIS CONTROL
Pin 12 (DM) enables PCM1744’s de-emphasis function. De-
emphasis operates only at 44.1kHz.
DM
0
1
De-emphasis OFF
De-emphasis ON (44.1kHz)
TABLE II. De-emphasis Control Selection.
1024 system (= SCKI) clocks
Reset
Reset Removal
2.6V
2.2V
1.8V
V
CC
Internal Reset
SCKI Clock
DIN
BCKIN
LRCIN
2
3
1
12
13
DM
TEST
SCKI
9
5
7
8
6
14
PCM
Audio Data
Processor
256f
S
or
384f
S
System Clock
GND
De-Emphasis Control
Lch Analog Out
+5V Analog
Rch Analog Out
V
CC
V
OUT
L
CAP
V
OUT
R
PCM1744
+10
μ
F
Post
LPF
Post
LPF
10
μ
F
+
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1744U | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 Bit 96kHz Smplg Stereo 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 |
| PCM1744U | 制造商:Texas Instruments 功能描述:24BIT DAC CMOS LOW COST SMD 1744 |
| PCM1744U/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 Bit 96kHz Smplg Stereo 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 |
| PCM1744U/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 Bit 96kHz Smplg Stereo 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 |
| PCM1744UG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 96kHz Sampling 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 |
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