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 October 2004
The Communications Edge TM
MH303
Cellular-band Quad-FET Mixer Product Information
Product Features
• +28 dBm IIP3
• RF 820 – 920 MHz
• IF 20 – 100 MHz
• Low-side LO configuration
• +13 dBm LO Drive Level
• High L-I & L-R Isolation (>38 dB)
• 6-pin 3x3 mm DFN lead-free/
green/RoHS-compliant Package
• No External Bias Required
Product Description
The MH303 is a passive Quad-MOSFET mixer that
provides high dynamic range performance in a low cost
3x3 mm 6-pin DFN (Dual Flat No-Lead) lead-
free/green/RoHS-compliant package.
WJ’s MH303 uses patented techniques to realize +28
dBm Input IP3 at an LO drive level of +13 dBm when
used in a simple application circuit with a low-side LO
configuration. The LO can also be driven with higher
power levels up +20 dBm to achieve higher IP3
performance. This mixer integrates internal circuitry to
provide single-ended interfaces for the RF & LO ports.
Typical applications include frequency up/down
conversion, modulation and demodulation for receivers
and transmitters used in cellular-band 3G mobile
infrastructure.
Functional Diagram
MH303
IF1
GND
LO
IF2
GND
RF4
5
6
3
2
1
Function Pin No.
IF Differential Input 1
LO port 3
RF port 4
IF differential Input 6
Ground 2, 5
Specifications
Parameters Units Minimum Typical Maximum Comments
RF Frequency Range MHz 820 920
LO Frequency Range MHz 720 900
IF Frequency Range MHz 20 70 100 See note 2
SSB Conversion Loss dB 7.5 8.0 See note 3
Input IP3 dBm +26 +27 RF = 820 MHz, See note 4
Input IP3 dBm +27 +28 RF = 870 MHz, See note 4
Input IP3 dBm +26 +27 RF = 920 MHz, See note 4
Input 1 dB Compression Point dBm +17.5 See note 5
Noise Figure dB 8
LO Input Drive Level dBm +13
LO-RF Isolation dB 35 38 LO freq = 750 – 850 MHz
LO-IF Isolation dB 40 44 LO freq = 750 – 850 MHz
Return Loss: RF Port dB 18
Return Loss: LO Port dB 12
Return Loss: IF Port dB 10
1. Data was taken using an application board in a 50 Ω system, with a low side LO at +13 dBm in a downconverting application at 25°C with an IF frequency = 70 MHz.
2. An IF frequency of 70 MHz is a nominal frequency. The IF frequency can be specified by the user within the constraints of the specified minimum and maximum RF and LO frequency range.
3. The conversion loss includes the loss of an IF transformer (M/A COM ETC1-1-13, nominal loss 0.7 dB at 70 MHz).
4. Input IP3 is measured with two tones with an input power of +3 dBm / tone separated by 1 MHz.
5. Although the input P1dB level is much higher, the continuous RF input power should not exceed +12 dBm. Operation above +12 dBm may cause permanent damage.
Absolute Maximum Ratings
Parameters Rating
Operating Case Temperature -40° to +85° C
Storage Temperature -40° to +125° C
LO Input Power +20 dBm
RF Input Power +12 dBm
Operation of this device above any of these parameters may cause permanent damage.
Ordering Information
Part No. Description
MH303 Cellular-band Quad-FET Mixer
(lead-tin plated pins)
MH303-G Cellular-band Quad-FET Mixer
(lead-free/green/RoHS-compliant Package)
MH303-PCB Fu ll y - A ss e mb l ed M H 30 3 Ap p li c at io n Bo a rd
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 October 2004
The Communications Edge TM
MH303
Cellular-band Quad-FET Mixer Product Information
Typical Performance Charts
Input IP3 vs RF Frequency
+25° C, LO = +13 dBm
10
15
20
25
30
770 820 870 920 970
RF Frequency (MHz)
Input IP3 (dBm)
IF = 100 MHz
IF = 70 MHz
IF = 50 MHz
IF = 23 MHz
Input IP3 vs RF Frequency
+25° C, IF = 70 MHz
15
20
25
30
35
770 820 870 920 970
RF Frequency (MHz)
Input IP3 (dBm)
LO = +17 dBm
LO = +15 dBm
LO = +13 dBm
LO = +11 dBm
Isolation vs LO Frequency
25° C, LO = +13 d Bm
30
35
40
45
50
700 750 800 850 900
LO Frequency (MHz)
Isolation (dB)
L-
R
L-I
Conversion Loss vs RF Frequency
+25° C, LO = +13 dBm
5
6
7
8
9
10
770 820 870 920 970
RF Frequency (MHz)
Conversion Loss (dB)
IF = 23 MHz
IF = 50 MHz
IF = 70 MHz
IF = 100 MHz
Conversion Loss vs RF Frequency
+25° C, IF = 70 MHz
5
6
7
8
9
10
770 820 870 920 970
RF Frequency (MHz)
Conversion Loss (dB)
LO = +11 dBm
LO = +13 dBm
LO = +15 dBm
LO = +17 dBm
Return Loss vs RF Frequency
+25° C, IF = 70 MHz, LO = +13 dBm
-25
-20
-15
-10
-5
0
770 820 870 920 970
RF Frequency (MHz)
RF Return Loss (dB)
Return Loss vs LO Frequency
+25° C, LO = +13 dBm
-25
-20
-15
-10
-5
0
700 750 800 850 900
LO Frequency (MHz)
LO Return Loss (dB)
Return Loss vs IF Frequency
+25° C, RF = 870 MHz, LO = +13 dBm
-25
-20
-15
-10
-5
0
20 40 60 80 100
IF Frequency (MHz)
IF Return Loss (dB)
Application Circuit
M/A-Co m E-Se r ies, ETC1- 1- 1 3
RF 1:1 Transformer, 4.5
–
3000 MHz
4 5 6
3 2 1
RF
LO IF
T2
6-lead
MLPM
3 x 3 mm
6-pin
DFN
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 October 2004
The Communications Edge TM
MH303
Cellular-band Quad-FET Mixer Product Information
MH303 Mechanical Information
This package may contain lead-bearing materials. The plating material on the leads is SnPb.
Package Information
M303
XXX
YYWW
Product Marking
The component will be laser marked with a model number
“M303” designator exactly as shown followed by an
assembly date code in location shown by “YYWW”. A
laser marked lot code will be in the location shown by
“XXX” and is unique for every assembly lot.
Tape and reel specifications for this part are located on the
website in the “Application Notes” section.
YYWW
*XXX
M303
Functional Schematic Diagram
RF
LO IF
180o
Two-Way
Power
Divider
180o
Two-Way
Power
Divider
MH303
ESD / MSL Information
ESD Rating: Class 1B
Value: Passes at 500 V
Test: Human Body Model (HBM)
Standard: JEDEC Standard JESD22-A114
MSL Rating: Level 1 at 235° C convection reflow
Standard: JEDEC Standard J-STD-020
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 October 2004
The Communications Edge TM
MH303
Cellular-band Quad-FET Mixer Product Information
MH303-G Mechanical Information
This package is lead-free/Green/RoHS-compliant. It is compatible with both lead-free (maximum 260°C reflow temperature) and leaded
(maximum 245°C reflow temperature) soldering processes. The plating material on the leads is annealed matte tin over copper.
Package Information
XXX
YYWW
G303
Product Marking
The component will be laser marked with a model number
“G303” designator exactly as shown followed by an
assembly date code in location shown by “YYWW”. A
laser marked lot code will be in the location shown by
“XXX” and is unique for every assembly lot.
Tape and reel specifications for this part are located on the
website in the “Application Notes” section.
YYWW
*XXX
G303
Functional Schematic Diagram
RF
LO IF
180o
Two-Way
Power
Divider
180o
Two-Way
Power
Divider
MH303
ESD / MSL Information
ESD Rating: Class 1B
Value: Passes at 500 V
Test: Human Body Model (HBM)
Standard: JEDEC Standard JESD22-A114
MSL Rating: Level 1 at 260° C convection reflow
Standard: JEDEC Standard J-STD-020
