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AST20S Datasheet(PDF) 22 Page - Advanced Semiconductor Business Inc.

Part # AST20S
Description  High Gain, Low Noise Amplifier
PDF  33 Pages
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Manufacturer  ASB [Advanced Semiconductor Business Inc.]
Direct Link  http://www.asb.co.kr
Logo ASB - Advanced Semiconductor Business Inc.

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ASB Inc.
· sales@asb.co.kr · Tel: +82-42-528-7223
August 2012
AST20S
High Gain, Low Noise Amplifier
1) OIP3 is measured with two tones at an output power of +0 dBm/tone separated by 1MHz.
Schematic
S-parameters & K-factor
APPLICATION CIRCUIT
Board Layout (FR4, 23x13 mm
2, 0.8T)
Note: 1) the length of the strip line P1 is given as below at
the PCB with Er = 4.5 and T = 0.8 mm.
*P1 Length: 1.8 mm, Width: 0.3 mm
2) Gain and S11 are in trade-off and varied with the length of P1
Bottom
Parameter
Symbol
Unit
Frequency (MHz)
1210~1270
1560~1620
Power Gain
Gp
dB
17
15
Noise Figure
NF
dB
0.55
0.55
Input Return Loss
RLin
dB
-11
-11
Output Return Loss
RLout
dB
-10
-12
1 dB Gain Compression
Output Power
Po(1dB)
dBm
15.5
16
3
rd Intercept Point
Output Power
1)
OIP3
dBm
25.5
27
Circuit Current
Icc
mA
18
18
Top
GPS
1210 ~ 1620 MHz
+3 V / 18 mA
C1=100 pF
C3=100 pF
RF OUT
AST20S
C2=10 nF
RF IN
L2=10 nH
*P1
R1=750
W
C4=1 uF
*P1
VDD
R2=6.2 k
W
L1=10 nH
R3=10
W
1000
1100
1200
1300
1400
1500
1600
1700
1800
0
5
10
15
20
25
Frequency (MHz)
1000
1100
1200
1300
1400
1500
1600
1700
1800
-20
-15
-10
-5
0
Frequency (MHz)
1000
1100
1200
1300
1400
1500
1600
1700
1800
-20
-15
-10
-5
0
Frequency (MHz)
0
500
1000
1500
2000
2500
3000
3500
0
1
2
3
4
5
Frequency (MHz)



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