AST54S_17 Datasheet, PDF (6/26 Pages) Advanced Semiconductor Business Inc. – High Gain, Low Noise Amplifier

APPLICATION CIRCUIT
GPS,GLONASS,Galileo,Compass
1500 ~ 1610 MHz
+5 V, 40 mA
Schematic
AST54S
High Gain, Low Noise Amplifier
Parameter
Symbol Unit
Frequency (MHz)
1500
1610
Power Gain
Noise Figure
Gp
dB
15.2
14.9
NF
dB
0.45
0.50
Input Return Loss
RLin
dB
-18
-18
Output Return Loss
RLout
dB
-18
-18
1 dB Gain Compression
Output Power
Po(1dB)
dBm 18
18
3^rd Intercept Point
Output Power¹⁾
OIP3
dBm 33
33
Circuit Current
Id
mA 40
40
1) OIP3 is measured with two tones at an output power of +4 dBm/tone separated by 1MHz.
Board Layout (FR4, 23x13 mm², 0.8T)
VDD
Top
C4=1 nF
R1=820  R3=43 
C5=1 uF
RF IN
C3=0.5 pF
C1=100 pF
R2=5.1 k
L1=5.6 nH
*P1
AST54S
*P1
L2=8.2 nH
C2=100 pF RF OUT
Bottom
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:3 mm, Width: 0.3 mm
2) Gain and S11 are in trade-off and varied with the length of P1
S-parameters & K-factor
30
25
20
15
10
5
0
1300
1400
1500
1600
Frequency (MHz)
6/26
0
-5
-10
-15
-20
-25
-30
-35
-40
1300
1400
1500
1600
Frequency (MHz)
0
-5
-10
-15
-20
-25
1700
1800
1700
1800
-30
1300
10
9
8
7
6
5
4
3
2
1
0
0
1400
1500
1600
Frequency (MHz)
1700
500
1000
1500
2000
2500
Frequency [MHz]
ASB Inc.  [e-mail]  Tel: [phone]
1800
3000
April 2017