參數(shù)資料
型號(hào)： 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(jí)分段音頻立體聲數(shù)模轉(zhuǎn)換器
文件頁數(shù)： 33/57頁
文件大?。?/td> 512K
代理商： PCM1796DBR
SLES100 DECEMBER 2003
www.ti.com
33
APPLICATION INFORMATION
TYPICAL CONNECTION DIAGRAM IN PCM MODE
DATA
24
23
22
21
20
19
18
17
16
15
5
6
7
8
9
10
11
12
13
14
PCM1796
BCK
SCK
DGND
VDD
MS
MDI
MC
MDO
RST
AGND2
IOUTR
VCC1
VCOML
VCOMR
IREF
IOUTR+
AGND3R
AGND1
+
ZEROL
1
2
3
4
ZEROR
MSEL
LRCK
28
27
26
25
VCC2L
AGND3L
IOUTL
IOUTL+
VOUT
L-Channel
5 V
VCC2R
0.1
μ
F
Controller
10
μ
F
3.3 V
PCM
Audio
Data
Source
0.1
μ
F
10
μ
F
Cf
Rf
Differential
to
Single
Converter
With
Low-Pass
Filter
47
μ
F
5 V
10
μ
F
10 k
+
Cf
Rf
+
VOUT
R-Channel
Cf
Rf
Differential
to
Single
Converter
With
Low-Pass
Filter
+
Cf
Rf
0.1
μ
F
10
μ
F
5 V
+
+
+
+
+
Figure 35. Typical Application Circuit for Standard PCM Audio Operation
APPLICATION CIRCUIT
The design of the application circuit is very important in order to actually realize the high S/N ratio of which the
PCM1796 is capable. This is because noise and distortion that are generated in an application circuit are not
negligible.
In the third-order LPF circuit of Figure 36, the output level is 2.1 V rms and 123 dB S/N is achieved.
Figure 37 shows a circuit for the DSD mode, which is a fourth-order LPF in order to reduce the out-of-band noise.
I/V Section
The current of the PCM1796 on each of the output pins (I
OUT
L+, I
OUT
L–, I
OUT
R+, I
OUT
R–) is 4 mA p-p at 0 dB (full
scale). The voltage output level of the I/V converter (Vi) is given by following equation:
Vi = 4 mA pp
×
R
f
(R
f
: feedback resistance of I/V converter)
An NE5534 op amp is recommended for the I/V circuit to obtain the specified performance. Dynamic performance
such as the gain bandwidth, settling time, and slew rate of the op amp affects the audio dynamic performance of the
I/V section.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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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