AH31
High Dynamic Range IF Amplifier
Product Information
Application Circuit: 220– 260 MHz (AH31-PCB240)
VS = +5 V
ID = 150 mA
C5
Typical Performance
.018 mF
Frequency
S21 - Gain
S11
240 MHz
19 dB
0603
L2
220 nH
0805
C1
1000 pF
0603
-15 dB
-17 dB
L1
56 nH
0603
S22
RF IN
RF OUT
Output P1dB
Output IP3
Noise Figure
Bias
+22 dBm
AH31
R2
0 W
0603
+42 dBm
C4
1000 pF
0603
R1
1.5 W
0603
1.8 dB
C3
2.2 pF
0603
+5 V @ 150 mA
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
S11 vs Frequency
S22 vs Frequency
20
18
16
14
12
10
0
-5
0
-5
-10
-15
-20
-25
-10
-15
-20
-25
-40 C
200
+25 C +85 C
250 300 350
-40 C +25 C +85 C
-40 C +25 C +85 C
100
150
200
250
300
350
400
100
150
400
100
150
200
250
300
350
400
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
OIP3 vs Frequency
Output IP3 vs. Temperature
Frequency=240, 241MHz, Pout=+10dBm/tone
Output IP3 vs. Output Power
25 C, Frequency = 240, 241 MHz
°
25 C, Freq. spacing = 1 MHz, Pout=+10 dBm/tone
°
44
42
40
38
36
34
44
42
40
38
36
34
50
45
40
35
30
25
0
2
4
6
8
10
-40
-20
0
20
40
60
80
220
230
240
250
260
Output Power (dBm)
Frequency (MHz)
Temperature (°C)
Noise Figure vs Frequency
P1dB vs Frequency
5
4
3
2
1
24
22
20
18
16
14
-40 C
+25 C +85 C
-40 C +25 C +85 C
0
220
230
240
Frequency (MHz)
250
260
220
230
240
250
260
Frequency (MHz)
Specifications and information are subject to change without notice
· Web site: www.wj.com February 2004
WJ Communications, Inc · Phone 1-800-WJ1-4401 · FAX: 408-577-6621 · e-mail: sales@wj.com
WJCI [ WJ COMMUNICATION. INC. ]
