ECG008 Просмотр технического описания (PDF) - Unspecified
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ECG008 Datasheet PDF : 5 Pages
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ECG008
InGaP HBT Gain Block
The Communications Edge TM
Product Information
Recommended Application Circuit
Vcc
Icc = 120 mA
RF IN
R2
C1
18
Blocking
£
Capacitor
R4
Bias
Resistor
C4
Bypass
Capacitor
C3
0.018 µF
L1
RF Choke
ECG008B
R3
4.7
£
RF OUT
C2
Blocking
Capacitor
R2
R3
Reference
Designator
L1
C1, C2, C4
50
820 nH
.018 µF
Recommended Component Values
Frequency (MHz)
500
900
1900 2200
220 nH 68 nH 27 nH 22 nH
1000 pF 100 pF 68 pF 68 pF
2500
18 nH
56 pF
3500
15 nH
39 pF
1. The proper values for the components are dependent upon the intended frequency of operation.
2. The component values in the table below are contained on the evaluation board to achieve optimal broadband
performance.
3. R2 and R3 are shown in the circuit diagram to avoid potential instabilities. The configuration shown above assures
of unconditional stability with the use of the device. It is expected that linearity parameters (OIP3 and P1dB) to
degrade about only 0.5 dB, while overall gain will be about 2 dB less than the performance shown in page 1 and 2 of
this datasheet. Input and output return loss is expected to improve with the use of the I/O series resistances at 2 GHz.
Ref. Desig.
L1
C1, C2
C3
C4
R2
R3
R4
Value / Type
39 nH wirewound inductor
56 pF chip capacitor
0.018 PF chip capacitor
Do Not Place
18 : chip resistor
4.7 : chip resistor
14 : 1% tolerance
Size
0603
0603
0603
0603
0603
2010
Recommended Bias Resistor Values
Supply
Voltage
R1 value
Size
9V
14 ohms
2010
10 V
23 ohms
2512
12 V
39 ohms
2512
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 +9 V. A
1% tolerance resistor is recommended.
ECG008B-PCB Performance Data
(WJ’s evaluation board uses the circuit shown above.)
Gain
14
12
10
Return Loss
0
S11 S22
-10
8
-20
6
4
-30
0
1
2
3
4
0
1
2
3
4
Frequency (GHz)
Frequency (GHz)
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
December 2004
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