DEMO-ALM-31X22 Datasheet, PDF (6/12 Pages) Broadcom Corporation. – 1-Watt High Linearity Amplifier

Demo Board Schematic
1,2,19,20
83
R1
1,22
2
C3
C2
21
20
C5
19
3,4
Bias
5
50-Ohms TL
6
Input
match
Output
match
C4 C1 _Z1
17,18
16
50-Ohms TL
12,13,14,15
78
Module Outline
9 10 11
C8
R2
C7 C6 _Z2
Circuit Symbol
C1, C6
C2, C4, C8
C3, C5, C7
R1
R2
Z1, Z2
Size
0805
0402
0402
0805
0805
0805
Value Description
2.2uF
Ceramic Chip Capacitor
0.1uF
Ceramic Chip Capacitor
10nF
Ceramic Chip Capacitor
0 Ohm Chip Resistor
Not Used N/A
Not Used Zener Diode 5.6V
(Optional)
1,2,19,20
Figure 6. Demo board application schematics and components table
Demo Board Layout
Pins pointing out of the page
Unit is on top
1 2 3 4 5 6 7 8 9 10
10
20 19 18 17 16 15 14 13 12 11
Pins 1,2,19,20 = Vsupply = Vdd
Pin 3 = Vsense (optional)
RF
Pins 5,6,15,16 = GND
input
Pin 8 = Vctrl
Other pins are not used
Figure 7. Demo Board Layout Diagram
1. Recommended PCB material is 10 mils Rogers RO4350, with FR4 backing for mechanical strength.
2. Suggested component values may vary according to layout and PCB material.
20-pin Connector
1
RF
output
6