EC1078_07 WJCI [WJ Communication. Inc.], EC1078_07 Datasheet - Page 3

• Manufacturer Part Number: EC1078_07
• Description: InGaP HBT Gain Block
• Manufacturer: WJCI [WJ Communication. Inc.]

WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: [phone] • e-mail: [e-mail] • Web site: www.wj.com
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
3. R1 and R2 are shown in the circuit diagram to avoid potential instabilities. The configuration shown above assures
C1, C2, C3
Designator
performance.
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 1 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.
Reference
RF IN
L1
S-Parameters (V
Capacitor
Freq (MHz)
Blocking
C1
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
500
EC1078
InGaP HBT Gain Block
50
Ref. Desig.
L1
C1, C2
C3
C4
R1
R2
R3
.018 µF
820 nH
6 Ω
R1
50
device
Recommended Application Circuit (EC1078B-PCB)
-13.94
-13.75
-13.18
-12.31
-11.09
S11 (dB)
-9.97
-8.87
-7.79
-6.76
-5.72
-4.72
-3.91
-3.22
= +5.6 V, I
EC1078B
Recommended Component Values
1000 pF
220 nH
Device S-parameters are available for download off of the website at: http://www.wj.com
500
Value / Type
39 nH wirewound inductor
56 pF chip capacitor
0.018 µF chip capacitor
Do Not Place
6 Ω chip resistor
6 Ω chip resistor
14 Ω 1% tolerance
Resistor
RF Choke
Capacitor
0.018 µF
CC
Bypass
Bias
-113.82
-148.03
-177.99
154.89
129.58
106.00
S11 (ang)
-39.71
-77.85
= 96 mA, T = 25°C, calibrated to device leads)
85.30
66.77
51.00
37.49
-3.83
Icc = 96 mA
C3
C4
L1
Vcc
100 pF
68 nH
900
Typical Device S-Parameters
Frequency (MHz)
6 Ω
R2
S21 (dB)
21.57
20.96
19.93
18.86
17.94
16.84
15.65
14.44
13.18
11.80
10.39
8.85
7.41
27 nH
68 pF
1900
Capacitor
Blocking
C2
RF OUT
22 nH
68 pF
2200
Size
0603
0603
0603
0603
0603
2010
176.70
148.92
122.53
S21 (ang)
-23.83
-41.03
-57.10
-71.74
98.71
76.48
54.17
33.67
13.81
-5.36
18 nH
56 pF
2500
-24.12
-23.37
-22.08
-20.68
-19.38
-18.50
-17.80
-17.41
-17.25
-17.22
-17.40
-17.84
-18.28
S12 (dB)
15 nH
39 pF
3500
Specifications and information are subject to change without notice
S12 (ang)
-11.42
-21.55
-32.42
-43.17
-53.97
-64.41
-74.10
-83.92
-1.93
0.80
6.98
8.80
4.63
The proper value for R bias is dependent upon the
supply voltage and allows for bias stability over
temperature. WJ recommends a minimum supply bias
of +7 V. A 1% tolerance resistor is recommended.
Voltage
Supply
Recommended Bias Resistor Values
10 V
12 V
7 V
8 V
9 V
-11.86
-11.69
-10.82
S22 (dB)
-9.54
-8.31
-7.34
-6.41
-5.63
-4.78
-4.07
-3.41
-2.93
-2.53
R bias value
14.6 ohms
25 ohms
35 ohms
46 ohms
67 ohms
-126.09
-158.11
173.96
148.41
125.43
105.05
S22 (ang)
-48.17
-90.17
86.50
70.24
56.07
43.40
-4.93
Page 3 of 4 April 2007
1210
1210
2010
2010
2512
Size