SGA5286Z
Pin
1
Function
RF IN
Description
RF input pin. This pin requires the use of an external DC-blocking capacitor chosen for the frequency of operation.
Connection to ground. For optimum RF performance, use via holes as close to ground leads as possible to reduce lead
inductance.
2, 4
GND
RF output and bias pin. DC voltage is present on this pin, therefor a DC-blocking capacitor is necessary for proper opera-
tion.
3
RF OUT/BIAS
Application Schematic
Frequency (Mhz)
Reference
Designator
500
850
1950
2400
3500
RBIAS
VS
CB
CD
LC
220 pF 100 pF
68 pF
22 pF
22 nH
56 pF
22 pF
18 nH
39 pF
15 pF
15 nH
100 pF
68 nH
68 pF
33 nH
1000
pF
CD
1 uF
LC
Recommended Bias Resistor Values for ID=60mA
R
Supply Voltage(VS)
RBIAS
BIAS=( VS-VD ) / ID
6 V 8 V
43 75
4
1 SGA5286Z
3
10 V
110
12 V
150
RF in
RF out
CB
2
CB
Note: RBIAS provides DC bias stability over temperature.
Evaluation Board Layout
VS
1 uF
RBIAS
Mounting Instructions
1000 pF
CD
1. Use a large ground pad area under device pins 2
and 4 with many plated through-holes as shown.
LC
2. We recommend 1 or 2 ounce copper. Measurements
for this data sheet were made on a 31 mil thick FR-4
board with 1 ounce copper on both sides.
CB
CB
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS100915
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