AST163 Datasheet, PDF (5/8 Pages) Advanced Semiconductor Business Inc. – High Gain, Low Noise Amplifier

APPLICATION CIRCUIT
GPS
1575 MHz
+2.8 V
AST163
High Gain, Low Noise Amplifier
Frequency (MHz)
1575
Magnitude S21 (dB)
15.5
Magnitude S11 (dB)
-10
Magnitude S22 (dB)
-11
Output P1dB (dBm)
10
Output IP3¹⁾ (dBm)
24
Noise Figure (dB)
0.9
Supply Voltage (V)
2.8
Current (mA)
9.5
1) OIP3 is measured with two tones at an output power of -5 dBm/tone
separated by 1MHz.
Schematic
VDD
C3=10 nF
R1=910 W
RF IN ^{C1=100 pF}
R2=6.2 kW
L1=6.2 nH
*P1
AST163
*P1
R3=30 W
C4=1 uF
L2=6.8 nH
C2=1.2 pF RF OUT
Board Layout (FR4, 15.3x12 mm², 0.8T)
Top
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: 3.4 mm, Width: 0.3 mm
2) Gain and S11 are in trade-off and varied with the length of P1
S-parameters & Noise Figure
25
0
20
-5
15
-10
10
-15
5
0
1400
1450
1500
1550 1600 1650
Frequency (MHz)
1700
1750
1800
0
-20
1400
1450
1500
1550 1600 1650
Frequency (MHz)
1700
1750
1800
5
-5
4
-10
3
-15
2
-20
1
-25
1400
1450
1500
1550 1600 1650
Frequency (MHz)
1700
1750
1800
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
5/8
ASB Inc. · [e-mail] · Tel: [phone]
July 2010