3
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AN1187.1
August 10, 2005
Application Note 1187
ISL59420/21EVAL1 Schematic Diagram
1 S
2 GND
3 IN0
4 EN
5 IN1
IN0
IN1
R8-75
Ω
R9-75
Ω
IN- 10
V+ 8
HIZ 6
S
V-
V+
GND.
RS - 75
Ω
OUT
+
C6
10µF
C5
0.1µF
C4
10nF
C8
1nF
C3
10µF
C2
0.1µF
C1
10nF
C7
1nF
D1
D2
JHIZ
JSO
R22
C11
ISL59420
OUT 9
V- 7
+
R
F
ISL59421
R12 - 49.9
Ω
HIZ
R19
49.9
Ω
EN
JSO
R14-49.9
Ω
ISL59420/21EVAL1 Components Parts List
DEVICE #
DESCRIPTION
COMMENTS
C7, C8
CAP, SMD, 0603, 1000pF, 25V, 10%, X7R
Power Supply Decoupling
C1, C4
CAP, SMD, 0603, 0.01µF, 25V, 10%, X7R
Power Supply Decoupling
C2, C5
CAP, SMD, 0603, 0.1µF, 25V, 10%, X7R
Power Supply Decoupling
C3, C6
CAP, SMD, 0805, 10µF, 6.3V, 10%, X5R
Power Supply Decoupling
D1, D2
Diode-Schottky, 2 Pin, 45V, 7.5A
MBR0550T (Motorola) Reverse Polarity Protection
R8, R9, RS
Resistor, SMD, 0603, 75
Ω
, 1/10W, 1%
Signal Input/output Termination
R12, R14, R19
Resistor, SMD, 0603, 49.9
Ω
, 1/16W, 1%
Logic Input Termination
R
F
- ISL59420
Resistor, SMD, 0603, 200
Ω
, 1/10W, 1%
Feedback Resistor
R
F
- ISL59421
Resistor, SMD, 0603, 357
Ω
, 1/10W, 1%
Feedback Resistor
C11
CAP, SMD, 0603
Optional, not populated
R22
Resistor, SMD, 0603
Optional, not populated
U1
ISL59420/21 - 400/900 MHz Multiplexing Amplifier,
10PIN, QSOP
Device Under Test
