參數(shù)資料
型號： TLC320AD77CDB
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO28
封裝： GREEN, PLASTIC, SSOP-28
文件頁數(shù)： 18/33頁
文件大小： 391K
代理商： TLC320AD77CDB
5–1
5 Application Information
5.1
Single-Ended to Differential External Analog Front-End Circuit
(fs = 44.1 kHz)
A single-ended to differential external analog front-end example circuit is shown in Figure 5–1. It biases the
input signal around AVDD/2 and applies the maximum input signal of 0.7 Vrms. The device sees a full-scale
differential input voltage of approximately 4 Vpp. For other maximum input signals, the ratio of R2/R1 can
be scaled accordingly to ensure a max ADC input of approximately 4 Vpp. As required by the ADC, R5, C4,
and R6 provide a single-pole low-pass antialiasing filter to attenuate unwanted frequencies. If the user
chooses to supply a single-ended input directly to the device (2 Vpp max), performance will be significantly
degraded.
_
+
10 k
47
F
AVDD/2
10 k
10 pF
_
+
10 k
10 pF
499
1000 pF
AINRM
AINRP
10 k
5 V
GND
R1
C1
8
2
3
4
1
U3:A
R2
R3
C2
R4
C3
R5
C4
499
R6
Antialiasing
Filter
Right Channel
Analog Input
0.7 Vrms
4 VPP
6
5
7
U3:B
21 1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
Figure 5–1. Analog Front End (right channel) for 0.7 Vrms Input
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