ASX521
250-3000 MHz MMIC Amplifier
Frequency (MHz)
824~849
30.5
-14
-8
32
47
11
5
870
APPLICATION CIRCUIT
CDMA Rx
824 ~ 849 MHz
+5 V
Magnitude S21 (dB)
Magnitude S11 (dB)
Magnitude S22 (dB)
Output P1dB (dBm)
Output IP3
1)
(dBm)
Noise Figure (dB)
Device Voltage (V)
Current (mA)
1) OIP3 is measured with two tones at an output power of +17
dBm/tone separated by 1 MHz.
Schematic
Vcc=5 V
D1=5.6V
Zener Diode
C6=1
mF
C8=1
mF
C5=100pF
C7=100pF
R2=7.5
W
C4=10 pF
2.5 mm
RF IN
L2=56 nH
8 mm
R1=15
W
C3=9 pF
ASX521
7 mm
C1=3.9 pF
L1=56 nH
(Coil Inductor)
RF OUT
C2=100 pF
Board Layout (FR4, 40x40 mm , 0.8T)
2
S-parameters
35
0
30
-5
-10
25
Gain (dB)
S11 (dB)
700
800
900
1000
1100
1200
-15
20
-20
15
-25
10
600
-30
600
700
800
900
1000
1100
1200
Frequency (MHz)
5
5
Frequency (MHz)
4
0
Stability Factor
700
800
900
1000
1100
1200
3
S22 (dB)
-5
2
-10
1
-15
600
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
Frequency (MHz)
3/12
ASB Inc.
·
sales@asb.co.kr
·
Tel: +82-42-528-7223
February 2010
ASB [ ADVANCED SEMICONDUCTOR BUSINESS INC. ]
