High Dynamic Range FET Mixer
HMJ4
The Communications Edge
™
Product Features
•
+36 dBm IIP3
•
No External Matching Elements
•
•
•
•
•
•
Product Description
The HMJ4 is a high dynamic range, GaAs FET
mixer. This active FET mixer realizes a typical
third order intercept point of +36 dBm at an
LO drive level of +17 dBm. The HMJ4 comes
in a low cost, J-lead package. Typical applica-
tions include frequency up/down conversion,
modulation and demodulation for receivers and
transmitters used in communications systems.
Functional Diagram
18 17 16 15 14 13 12 11 10
Required
RF 1700-1880 MHz
LO 1550-1830 MHz
IF 50-150 MHz
+17 dBm Drive Level
+3V Bias (18 mA)
Low Cost Surface Mount J-Lead
Package
1 2 3 4 5 6 7 8 9
Function Pin No. Function Pin No.
Ground
1
Ground
10
IF
2
LO
11
Ground
3-7
Ground 12-16
+3V DC
8
RF
17
Ground
9
Ground
18
Specifications
Parameter
Frequency Range:
RF
LO
IF
SSB Conversion Loss
Noise Figure
Isolation:
LO-RF
LO-IF
RF-IF
IIP3
Return Loss:
RF Port
LO Port
IF Port
Input P1dB
LO Drive Level
DC Current at +3V Bias
Units
MHz
MHz
MHz
dB
dB
dB
dB
dB
dBm
dB
dB
dB
dBm
dBm
mA
Minimum
1700
1550
50
8.8
11
18
23
31
34
33
14
36
11
9
15
23
17
18
Typical
Maximum
1880
1830
150
9.4
Condition
RF = 1800 MHz (0dBm)
30
Test conditions unless otherwise stated: RF = 1800 MHz (-10 dBm), LO = 1700 MHz (17 dBm), IF = 100 MHz and 25˚C.
Absolute Maximum Ratings
Parameter
Operating Case Temperature
Storage Temperature
Maximum Input Power
Rating
-40 to +85°C
-65 to +100°C
25 dBm
Ordering Information
Part No.
HMJ4
HMJ4-PCB
Description
High Dynamic Range FET Mixer
(Available in tape and reel)
Fully Assembled Application Circuit
1. Operation of this device above any of these parameters may cause permanent damage.
2. Total sum of LO port and RF port power should not exceed 25 dBm.
WJ Communications, Inc.
• Phone: 1-800-WJ1-4401 • FAX: 408-433-5649 • e-mail: sales@wj.com • Web site: www.wj.com
September 2000
HMJ4
Performance Charts
IIP3 vs. RF Frequency
50
Input Intercept Point (dBm)
Conversion Loss vs. RF Frequency
5.0
IF = 100 MHz
Conversion Loss
7.5
IF = 50 MHz
IF = 150 MHz
45
40
IF = 50 MHz
IF = 100 MHz
10.0
35
IF = 150 MHz
30
1700
1750
1800
RF Frequency (MHz)
1850
1880
12.5
15.0
1700
1750
1800
RF Frequency (MHz)
1850
1880
Isolation vs. LO Frequency
50
40
Isolation (dB)
30
L-R
20
10
0
1550
0
1700
Isolation (dB)
L-I
20
30
Isolation vs. RF Frequency
R-I
10
1600
1650
1700
1750
LO Frequency (MHz)
1800 1830
1750
1800
RF Frequency (MHz)
1850
1880
RF Return Loss vs. RF Frequency
0
0
LO Return Loss vs. LO Frequency
0
IF Return Loss vs. IF Frequency
RF Return Loss (dBm)
10
10
IF Return Loss (dB)
1600
1650
1700
1750
LO Frequency (MHz)
1800 1830
5
LO Return Loss
5
5
10
15
15
15
20
1700
1750
1800
RF Frequency (MHz)
1850
1880
20
1550
20
50
70
90
110
IF Frequency (MHz)
130
150
WJ Communications, Inc.
• Phone: 1-800-WJ1-4401 • FAX: 408-433-5649 • e-mail: sales@wj.com • Web site: www.wj.com
September 2000
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