G003B Datasheet, PDF (3/4 Pages) TriQuint Semiconductor – InGaP HBT Gain Block

ECG003
InGaP HBT Gain Block
Recommended Application Circuit
Vcc
Icc = 110 mA
RF IN
C1
Blocking
Capacitor
R1
18 Ω
R3
Bias
Resistor
C4
Bypass
Capacitor
C3
0.018 µF
L1
RF Choke
ECG003B
R2
4.7 Ω
RF OUT
C2
Blocking
Capacitor
Reference
Designator
L1
C1, C2, C3
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. R1 and R2 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
R1
R2
R3
Value / Type
39 nH wirewound inductor
56 pF chip capacitor
0.018 μF chip capacitor
Do Not Place
18 Ω chip resistor
4.7 Ω chip resistor
16 Ω 1% tolerance
Size
0603
0603
0603
0603
0603
2010
Recommended Bias Resistor Values
Supply
Voltage
R3 value
Size
9V
16 ohms
2010
10 V
25 ohms
2512
12 V
44 ohms
2512
The proper value for R3 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.
ECG003B-PCB Performance Data
(WJ’s evaluation board uses the circuit shown above.)
Gain
20
Return Loss
0
18
-10
16
14
-20
12
S11 S22
10
-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: [phone] • e-mail: [e-mail] • Web site: www.wj.com, www.TriQuint.com
Page 3 of 4 January 2008