參數(shù)資料
型號: DSD1793DBR
元件分類: DAC
英文描述: 24 BIT 192 KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER
中文描述: 24位192千赫采樣高級分段音頻立體聲數(shù)模轉(zhuǎn)換器
文件頁數(shù): 26/47頁
文件大小: 428K
代理商: DSD1793DBR
DSD1793
SLES075A MARCH 2003 REVISED JANUARY 2004
www.ti.com
32
APPLICATION INFORMATION
ANALOG OUTPUTS
SCK
24
23
22
21
20
19
18
17
16
15
5
6
7
8
9
10
11
12
13
14
DSD1793
ADR1
VDD
DGND
AGNDF
VCCR
AGNDR
VOUTR
VOUTR+
VCOM
DSDR
VOUTL
ZEROL
ZEROR
VCCF
VCCL
VOUTL+
AGNDC
AGNDL
PLRCK
1
2
3
4
PBCK
PDATA
DBCK
28
27
26
25
ADR0
SCL
SDA
DSDL
VCCC
+
1
F
+
C3L
R6L
R4L
R5L
C1L
C2L
R3L
R2L
R1L
VOUT
L-Channel
+
5 V
+
VOUT
R-Channel
10
F
0.1
F
C3R
R6R
R4R
R5R
C1R
C2R
R3R
R2R
R1R
NOTE: Example R and C values for fC = 77 kHz – R1, R2: 1.8 k, R3,R4: 3.3 k, R5,R6: 680 , C1: 1800 pF, C2, C3: 560 pF.
Figure 32. Typical Application for Analog Output Stage
Analog Output Level and LPF
The signal level of the DAC differential-voltage output {(VOUTL+)–(VOUTL–), (VOUTR+)–(VOUTR–)} is 3.2 V p-p
at 0 dB (full scale). The voltage output of the LPF is given by following equation:
VOUT = 3.2 V p-p × (Rf/Ri)
Here, Rf is the feedback resistor in the LPF, and R3 = R4 in a typical application circuit. Ri is the input resistor
in the LPF, and R1 = R2 in a typical application circuit.
Op Amp for LPF
An OPA2134 or 5532 type op amp is recommended for the LPF circuit to obtain the specified audio
performance. Dynamic performance such as gain bandwidth, settling time, and slew rate of the op amp largely
determines the audio dynamic performance of the LPF section. The input noise specification of the op amp
should be considered to obtain a 113-dB S/N ratio.
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