ASL19C
5-3000 MHz High Linearity LNA MMIC
Frequency (MHz)
824
19.9
-18
-15
20.5
35.5
0.8
4.0
68
894
19.2
-18
-12
21.0
35.5
0.8
4.0
68
APPLICATION CIRCUIT
CDMA
824 ~ 894 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 +10 dBm/tone sepa-
rated by 1 MHz.
Schematic
Note: A shunt R
B
is a bias resistor requisite to
operate ASL19C properly, while R
D
as a volt-
age drop resistor is added to apply 3.9 V to
the device. A user can easily REDUCE an
operating current by choosing different R
B
values with minimized loss only in OIP3 and
P1dB.
C1=100 pF R
B
=6.8 kW
L2=6.8 nH
Vs=5 V
R
D
=15
W
D1=5.6V
Zener Diode
C6=10 nF
C5=100 pF
L1=27 nH
C2=100 pF
ASL19C
RF OUT
Board Layout (FR4, 40x40 mm , 0.8T)
2
RF IN
L3=39 nH
C3=3.3
pF
R1=1.6
kW
C4=
2 pF
S-parameters & K-factor
25
0
20
-5
Gain (dB)
-10
15
S11 (dB)
700
800
900
1000
1100
1200
-15
10
-20
5
-25
0
600
-30
600
700
800
900
1000
1100
1200
Frequency (MHz)
0
5
Frequency (MHz)
-5
4
-10
Stability Factor
700
800
900
1000
1100
1200
3
S22 (dB)
-15
2
-20
-25
1
-30
600
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
Frequency (MHz)
3/4
ASB Inc.
·
sales@asb.co.kr
·
Tel: +82-42-528-7223
September 2012
ASB [ ADVANCED SEMICONDUCTOR BUSINESS INC. ]
