AH31
High Dynamic Range IF Amplifier
Product Information
Application Circuit: 220 – 260 MHz (AH31-PCB240)
V
S
= +5 V
I
D
= 150 mA
Typical Performance
Frequency
240 MHz
19 dB
S21 - Gain
-15 dB
S11
-17 dB
S22
Output P1dB
+22 dBm
Output IP3
+42 dBm
Noise Figure
1.8 dB
Bias
+5 V @ 150 mA
C5
.018
µF
0603
C1
1000 pF
0603
L2
220 nH
0805
AH31
R1
1.5
Ω
0603
R2
0
Ω
0603
C4
1000 pF
0603
RF IN
L1
56 nH
0603
RF OUT
C3
2.2 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)
S11 (dB)
16
14
12
10
100
150
-40 C
200
+25 C
250
+85 C
300
350
400
0
-5
-10
-15
-20
-25
100
150
S11 vs Frequency
0
-5
S22 (dB)
-10
-15
-20
-40 C
200
+25 C
250
+85 C
300
350
400
-25
100
-40 C
150
S22 vs Frequency
+25 C
200
+85 C
250
300
350
400
Frequency (MHz)
OIP3 vs Frequency
44
Output IP3 (dBm)
42
40
38
36
34
220
230
240
Frequency (MHz)
250
260
25
°
C, Freq. spacing = 1 MHz, Pout=+10 dBm/tone
Frequency (MHz)
Output IP3 vs. Temperature
44
Output IP3 (dBm)
42
40
38
36
34
-40
-20
0
20
40
60
80
Temperature (C)
°
Noise Figure vs Frequency
P1dB vs Frequency
24
P1dB (dBm)
22
20
18
16
-40 C
230
+25 C
240
Frequency (MHz)
+85 C
250
260
14
220
-40 C
230
+25 C
240
Frequency (MHz)
+85 C
250
Frequency = 240, 241 MHz, Pout=+10 dBm/tone
Frequency (MHz)
Output IP3 vs. Output Power
50
Output IP3 (dBm)
45
40
35
30
25
0
2
25
°
C, Frequency = 240, 241 MHz
4
6
8
10
Output Power (dBm)
5
Noise Figure (dB)
4
3
2
1
0
220
260
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. ]
