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TS4997 데이터시트(PDF) 28 Page - STMicroelectronics

부품명 TS4997
상세설명  2 x 1W differential input stereo audio amplifier with programmable 3D effects
PDF  34 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS4997 데이터시트(HTML) 28 Page - STMicroelectronics

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Application information
TS4997
28/34
Figure 67.
Typical single-ended input application
The component calculations remain the same for the gain. In single-ended input
configuration, the formula is:
with RIN expressed in kΩ.
4.14
Notes on PSRR measurement
What is the PSRR?
The PSRR is the power supply rejection ratio. The PSRR of a device is the ratio between a
power supply disturbance and the result on the output. In other words, the PSRR is the
ability of a device to minimize the impact of power supply disturbance to the output.
How is the PSRR measured?
The PSRR is measured as shown in Figure 68.
Cin1
330nF
Cb
1uF
Cs
1uF
1
2
4
3
14
12
11
9
10
BIAS
STBY
3D
EFFECT
LEFT
RIGHT
LI N-
RIN-
LI N+
RIN+
Bypa ss
GND
GND
LOUT-
LOUT+
ROUT-
ROUT+
-
+
+
-
Vcc
TS4997 - Q FN16
Cin2
330nF
Cin3
330nF
Cin4
330nF
VCC
Left Speaker
8 Ohms
Right Speaker
8 Ohms
P1
Diff. input L-
P2
Diff. input R-
Rin1
24k
Rin2
24k
Rin3
24k
Rin4
24k
Av
SE =
V
O+
V
O-
–
V
e
--------------------------
R
feed
R
IN
--------------
50k
Ω
R
IN
--------------
==



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