SGA-4186 Просмотр технического описания (PDF) - RF Micro Devices
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SGA-4186 Datasheet PDF : 6 Pages
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SGA-4186(Z)
Pin
1
2, 4
3
Function Description
RF IN
RF input pin. This pin requires the use of an external DC blocking capacitor chosen for the frequency of opera-
tion.
GND
Connection to ground. For optimum RF performance use via holes as close to ground leads as possible to
reduce lead inductance.
RF OUT/BIAS RF output and bias pin. DC voltage is present on this pin, therefore a DC clocking capacitor is necessary for
proper operation.
Application Schematic
RBIAS
VS
RF in
1 uF 1000
pF
CD
4
1
3
SGA-4186
CB
2
L
C
CB
Reference
Designator 500
Frequency (Mhz)
850
1950
2400
CB
220 pF 100 pF 68 pF 56 pF
CD
100 pF 68 pF 22 pF 22 pF
LC
68 nH 33 nH 22 nH 18 nH
3500
39 pF
15 pF
15 nH
RF out
Recommended Bias Resistor Values for ID=45mA
RBIAS=( VS-VD ) / ID
Supply Voltage(VS) 6 V 8 V 10 V 12 V
RBIAS
62 110 150 200
Note: RBIAS provides DC bias stability over temperature.
Evaluation Board Layout
V
S
R
BIAS
LC
1 uF
1000 pF
CD
Mounting Instructions
1. Use a large ground pad area under device pins 2
and 4 with many plated through-holes as shown.
CB
C
2. We recommend 1 or 2 ounce copper. Measurements
B
for this data sheet were made on a 31 mil thick FR-4
board with 1 ounce copper on both sides.
4 of 6
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
EDS-100637 Rev F
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