Application Note 1283
S2 - POWER DOWN CONTROL
SPDT - CENTER OFF VDD PD - BNC
GND R7
10k
EN - BNC
S1- ENABLE CONTROL
SPDT- CENTER OFF
GND
GND
IN_B - BNC
R1
50 Ω
GND
TP-IN_B
DIF+
DIF-
VDD
1
2
3
4
GND
.
VDD
/ENABLE
PD
IN-B
R8
10k
OB 12
GND 11
VH 10 VH
OA 9
DIF+
DIF-
GND
TP-OB
GND
R3 R5
0 Ω 0 Ω
C6 C8
NOT NOT
POPULATED POPULATED
GND
R4 R6
0 Ω 0 Ω
OB - BNC
OA - BNC
IN_A - BNC
R2
50 Ω
TP-IN_A
DIF+
DIF-
DIF+
DIF-
ISL55110, ISL55111_QFN
TP-OA
C7 C9
NOT NOT
POPULATED POPULATED
GND
GND
VH - BANANA JACK
VH
GND
C1 C2
+ 4.7μF 0.1μF
TP-VH
DIF+
DIF-
TP_VDD
DIF+
DIF-
VDD
C3
0.1μF
GND
C4
0.1μF
C5
+ 4.7μF
VDD - BANANA JACK
GND - BANANA JACK
GND
FIGURE 7. QFN EVALUATION BOARD SCHEMATIC
FIGURE 8. QFN LAYOUT
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to
verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
4
AN1283.0
February 13, 2007
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