ASX420
250-3500 MHz MMIC Amplifier
Frequency (MHz)
824~849
33
-15
-9
29.5
46.5
7.0
5
370
869~894
32
-15
-8
29.5
47
7.5
5
370
890~915
31.5
-15
-7
29.5
47
6.8
5
370
APPLICATION CIRCUIT
CDMA, GSM Rx
824 ~ 915 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 +12 dBm/tone separated
by 1 MHz.
Schematic
Vcc=5 V
D1=5.6V
Zener Diode
C6=1
mF
C5=100pF
C8=1
mF
C7=100pF
RF IN
C1=100 pF
C3=6 pF
C4=100 pF
L2=82 nH
1.5 mm
ASX420
8 mm
L1=82 nH
(Coil Inductor)
C2=100 pF RF OUT
Board Layout (FR4, 40x40 mm , 0.8T)
2
R1=3
W
S-parameters & K-factor
50
0
40
-5
30
-10
Gain (dB)
20
S11 (dB)
o
-15
10
-40 c
25
o
c
85
o
c
-20
-40
o
c
25
o
c
85
o
c
0
600
700
800
900
1000
1100
1200
-25
600
700
800
900
1000
1100
1200
Frequency (MHz)
5
5
Frequency (MHz)
0
4
-5
Stability Factor
1200
3
S22 (dB)
-10
2
-15
-40 c
25
o
c
85
o
c
o
1
-20
600
700
800
900
1000
1100
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
Frequency (MHz)
4/12
ASB Inc.
·
sales@asb.co.kr
·
Tel: +82-42-528-7223
September 2011