WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com April 2002
The Communications Ed
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e TM
Advanced Product Information
MH202
Hi
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e Cellular Band MMIC Mixer
Product Features
• +30 dBm IIP3
• RF 890 – 960 MHz
• LO 640 – 760 MHz
• IF 200 – 250 MHz
• +17 dBm Drive Level
• Low Cost SOIC-8 Package
• No External Bias Required
Product Description
The MH202 is a passive GaAs MESFET mixer that
p
rovides high dynamic range performance in a low
cost SOIC-8 package. WJ’s MH202 uses patented
techniques to realize +30 dBm Input IP3 at an LO
drive level of +17 dBm when used in a simple
application circuit as an upconverting configuration.
This single monolithic integrated circuit does no
t
require any external baluns or bias elements.
Typical applications include frequency up/down
conversion, modulation and demodulation fo
r
receivers and transmitters used in 2.5G and 3G
systems using the cellular GSM frequency band.
Functional Diagram
Function Pin No.
LO
IF & RF*
GND
2
5
1,3,4,6,8
* 4 external components (inductors & capacitors)
are required to diplex the signal
Specifications
Parameters1 Units Minimum Typical Maximum Comments
Frequency Range:
RF MHz 890 960
LO MHz 640 760
IF MHz 200 250
SSB Conversion Loss dB 9.5 10
Noise Figure dB 10
Input IP32 dBm
+30
Input P1dB dBm TBD
Isolation:
L-R dB 30
L-I dB 55
R-I dB TBD
Return Loss: dB
LO Port -5
LO Drive Level dBm +17
1. Data was taken using an application board shown on the following page, with a low side LO at +17 dBm in an upconverting application at 25°C.
2. Input IP3 was measured with two tones with an input power of -5 dBm / tone separated by 1 MHz.
Absolute Maximum Rating3 Application Circuit
Parameters Rating
Operating Case Temperature -40° to +85 °C
Storage Temperature -65° to +100 °C
Maximum Input LO Power4 +21 dBm
3. Operation of this device above any of these parameters may cause permanent damage.
4. Total sum of LO port and RF port power should not to exceed +23 dBm.
1
2
3
4
8
7
6
5
RF
C1
12 pF
IF
C2
5.6 pF
L2
15 nH
L1
27 nH
L
O
All components are of size 0402
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com April 2002
The Communications Ed
g
e TM
Advanced Product Information
MH202
Hi
g
h D
y
namic Ran
g
e Cellular Band MMIC Mixer
This document contains information on a new product.
Specifications and information are subject to change without notice.
