The Communications Edge TM
AG503-86
InGaP HBT Gain Block
Product Information
Typical Device RF Performance
Supply Bias = +8 V, Rbias = 44 Ω, Icc = 45 mA
Gain vs. Frequency
Output IP3 vs. Frequency
Output IP2 vs. Frequency
22
20
18
16
14
12
35
30
25
20
15
45
40
35
30
25
-40 C
+25 C
+85 C
800
-40 C
0.5
+25 C
1.5
+85 C
2.5
-40 C
+25 C
+85 C
0
1
2
3
3.5
0
200
400
600
1000
0
1
2
3
4
Frequency (GHz)
Frequency (GHz)
Frequency (MHz)
P1dB vs. Frequency
Noise Figure vs. Frequency
20
15
10
5
5
4
3
2
1
0
-40 C
+25 C
2
+85 C
-40 C
+25 C
+85 C
2.5
0
0
0.5
1
1.5
2.5
3
3.5
4
0
0.5
1
1.5
2
3
Frequency (GHz)
Frequency (GHz)
Vcc
Icc = 45 mA
Application Circuit
R1
Bias
Resistor
C4
Bypass
Capacitor
C3
0.018 µF
L1
RF Choke
RF IN
RF OUT
AG503-86
C2
C1
Blocking
Capacitor
Blocking
Capacitor
Recommended Component Values
Reference
Recommended Bias Resistor Values
Supply
Voltage
6 V
7 V
8 V
9 V
10 V
12 V
Frequency (MHz)
R1 value
S ize
Designator
50
500
900
68 nH
100 pF
1900
27 nH
68 pF
2200
22 nH
68 pF
2500
18 nH
56 pF
3500
15 nH
39 pF
L1
820 nH
.018 µF
220 nH
1000 pF
22.2 ohms
44.4 ohms
67 ohms
89 ohms
111 ohms
156 ohms
0603
C1, C2, C4
0805
1206
1210
1210
2010
1. The proper values for the components are dependent upon the intended frequency of operation.
2. The following values are contained on the evaluation board to achieve optimal broadband performance:
Ref. Desig.
Value / Type
Size
L1
C1, C2
C3
39 nH wirewound inductor
56 pF chip capacitor
0.018 μF chip capacitor
Do Not Place
0603
0603
0603
The proper value for R1 is dependent upon the supply
voltage and allows for bias stability over temperature.
WJ recommends a minimum supply bias of +6 V.
1% tolerance resistor is recommended.
C4
A
R1
0805
22.1 Ω 1% tolerance
Specifications and information are subject to change without notice
Page 3 of 6 July 2005
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