AH31
High Dynamic Range IF Amplifier
Product Information
Application Circuit: 65 – 85 MHz (AH31-PCB75)
V
S
= +5 V
I
D
= 150 mA
Typical Performance
Frequency
75 MHz
19 dB
S21 - Gain
-25 dB
S11
-25 dB
S22
Output P1dB
+22 dBm
Output IP3
+42 dBm
Noise Figure
2.4 dB
Bias
+5 V @ 150 mA
C5
.018
µF
0603
C1
.018
µF
RF IN 0603
L2
330 nH
0805
AH31
R1
1.0
Ω
0603
R2
0
Ω
0603
C4
.018
µF
0603
L1
220 nH
0603
RF OUT
C3
12 pF
0603
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. C2 (from the silkscreen) is not utilized in this application circuit.
Gain vs Frequency
20
18
Gain (dB)
16
14
12
10
55
65
75
Frequency (MHz)
OIP3 vs Frequency
46
Output IP3 (dBm)
44
42
40
38
36
55
65
75
Frequency (MHz)
85
95
25
°
C
25
°
C
S11, S22 vs Frequency
0
S11, S22 (dB)
-5
-10
-15
-20
-25
-30
85
95
55
65
75
Frequency (MHz)
Noise Figure vs Frequency
5
Noise Figure (dB)
4
3
2
1
0
55
65
75
Frequency (MHz)
85
95
25
°
C
25
°
C
Wideband S-Parameter Performance
20
S21, S11, S22 (dB)
S21
10
0
S11
-10
-20
-30
S22
25
°
C
S11
S22
85
95
50
100
150
200
250
300
350
400
Frequency (MHz)
P1dB vs Frequency
24
P1dB (dBm)
22
20
18
16
14
55
65
75
Frequency (MHz)
85
95
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. ]
