AH31
High Dynamic Range IF Amplifier
Product Information
Application Circuit: 450 – 550 MHz (AH31-PCB500)
Typical Performance
Frequency
500 MHz
18 dB
S21 - Gain
-15 dB
S11
-10 dB
S22
Output P1dB
+22 dBm
Output IP3
+42 dBm
Noise Figure
1.7 dB
Bias
+5 V @ 150 mA
V
S
= +5 V
I
D
= 150 mA
C5
.018
µF
0603
C1
1000 pF
RF IN 0603
L2
150 nH
0805
AH31
R2
0
Ω
0603
C4
1000 pF
0603
L1
22 nH
0603
RF OUT
Notes:
1. The amplifier should be connected directly to a +5 V regulator; no dropping resistor is required.
2. If no DC signal is present at the input (pin 1), C1 can be removed. The gate is internally grounded in the amplifier.
3. R2 is used as a placeholder for a different application circuit. It can be removed from the circuit.
4. R1, C2, and C3 (from the silkscreen) are not utilized in this application circuit.
Gain vs Frequency
20
18
Gain (dB)
16
14
12
10
450
475
500
Frequency (MHz)
OIP3 vs Frequency
46
Frequency (MHz)
44
42
40
38
36
450
475
500
Output IP3 (dBm)
525
550
25
°
C
25
°
C
S11, S22 vs Frequency
0
S11, S22 (dB)
-5
-10
-15
-20
525
550
450
475
500
Frequency (MHz)
Noise Figure vs Frequency
5
Noise Figure (dB)
4
3
2
1
0
450
475
500
Frequency (MHz)
525
550
25
°
C
25
°
C
Wideband S-Parameter Performance
20
S21, S11, S22 (dB)
10
0
-10
-20
-30
S22
S11
25
°
C
S21
S22
S11
525
550
0
200
400
600
800
1000
Frequency (MHz)
P1dB vs Frequency
24
P1dB (dBm)
22
20
18
16
14
450
475
500
Frequency (MHz)
525
550
25
°
C
Specifications and information are subject to change without notice
WJ Communications, Inc
•
Phone 1-800-WJ1-4401
•
FAX: 408-577- 6621
•
e-mail: sales@wj.com
•
Web site: www.wj.com
February 2004
WJCI [ WJ COMMUNICATION. INC. ]
