參數(shù)資料
型號: THS4271DRB
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: VIDEO AMPLIFIER, PDSO8
封裝: EXPOSED PAD, LEADLESS, PLASTIC, MSOP-8
文件頁數(shù): 22/35頁
文件大小: 422K
代理商: THS4271DRB
THS4271
THS4275
SLOS397C – JULY 2002 – REVISED JANUARY 2003
www.ti.com
29
In order to achieve the maximum performance of the
device, PCB layout is very critical. Texas Instruments has
developed an EVM for the evaluation of the THS4271 in a
gain of 1. The EVM is shown in Figure 101 through
Figure 104. This EVM is designed to minimize peaking in
the unity gain configuration.
Minimizing the inductance in the feedback path is critical
for reducing the peaking of the frequency response in unity
gain. The recommended maximum inductance allowed in
the feedback path is 4 nH. This can be calculated by using
equation 8.
L(nH)
+ K ln 2
W
) T )
0.223 W ) T
) 0.5
where:
W = Width of trace in inches.
= Length of the trace in inches
.
T = Thickness of the trace in inches.
K = 5.08 for dimensions in inches, and K = 2 for dimensions
in cm.
Figure 95. THS4271/THS4275 EVM Circuit
Configuration
R1
R5
J2
Vin+
R6
Vs+
U1
2
3
6
7
41
8
J8
Power Down Ref
Vs+
R8
C8
Vs –
R4
R7
C7
J9
Power Down
R2
J4
Vout
Vs –
R9
R3
J1
Vin–
TP1
+
C1
VS–
J7
C6
C5
C2
VS+
J5
+
FB2
C4
C3
FB1
VS–
GND
VS+
J6
_
+
Figure 96. THS4271/THS4275 EVM Board
Layout (Top Layer)
Figure 97. THS4271/THS4275 EVM Board
Layout (Second Layer, Ground)
(8)
相關(guān)PDF資料
PDF描述
THS4275DRB VIDEO AMPLIFIER, PDSO8
THS4271MDEP 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4271MDGNTEP 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4271MDREP 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
THS4275MDEP 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
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