Preliminary Data Sheet
Product Description
The Sirenza SPM-2045 is a passive mixer designed for
systems that require high linearity down- or up-conversion.
It employs proprietary silicon FETs with proven reliable
core-and-wire baluns. It operates efficiently over a wide
range of Local Oscillator powers, with input third order
intercept remaining approximately 15-18 dB above LO
power over this range. This product is packaged in a standard surface mount module for excellent RF performance.
SPM-2045
High Linearity Passive FET Mixer
Functional Block Diagram
Product Features
•
•
IF
RF
Excellent linearity.
Efficient operation over wide LO power
range.
LO
•
Well behaved over variations in frequency,
LO power, and port match.
Applications
•
PCS, DCS, UMTS upconverters and downconverters
Product Specifications: Down-converter
Test Conditions: FLO = 1.8GHz FIF = 150MHz Frf = 1.95GHZ Plo = 17dBm
Unit
Min.
RF Input Frequency Range
Parameters
Test Conditions
GHz
1.7
2.3
LO Frequency
GHz
1.7
2.3
MHz
50
IF Output Frequency
dB
Typ.
500
RF Return Loss
Frf = 1.9GHz
LO Return Loss
Flo = 1.7GHz
dB
5
IF Return Loss
Fif=200MHz
dB
14
Conversion Loss
2 GHz
SSB Noise Figure
TOI (Input)
Max.
14
7.5
10
7.5
10
Plo=14dBm
dBm
28
Plo=17dBm
dBm
31
Plo=20dBm
dBm
33
P1dB (input)
Plo=17dBm
dBm
20
LO-RF isolation
2 GHz
dB
30
LO-IF isolation
2 GHz
dB
30
RF-IF isolation
2 GHz
dB
35
The information provided herein is believed to be reliable at press time. Sirenza Microdevices assumes no responsibility for inaccuracies or ommisions.
Sirenza Microdevices assumes no responsibility for the use of this information, and all such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without
notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. Sirenza Microdevices does not authorize or warrant any Sirenza Microdevices product
for use in life-support devices and/or systems.
Copyright 2002 Sirenza Microdevices, Inc. All worldwide rights reserved.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
1
http://www.sirenza.com
EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
Product Specifications: Up-converter
Test Conditions: FLO = 1.8GHz FIF = 150MHz Frf = 1.95GHZ Plo = 17dBm
Unit
Min.
RF Output Frequency Range
Parameters
Test Conditions
GHz
1.7
2.3
LO Frequency
GHz
1.7
2.3
MHz
40
IF Input Frequency
RF Return Loss
Frf = 1.9GHz
Typ.
300
dB
14
LO Return Loss
Flo = 1.7GHz
dB
5
IF Return Loss
Fif=200 MHz
dB
14
Plo=14dBm
dBm
23
Plo=17dBm
dBm
27
Plo=20dBm
dBm
30
Plo=17dBm
dBm
20
Conversion Loss
TOI (Input)
P1dB (input)
8
Absolute Maximum Ratings
Parameters
Max.
10
Caution: ESD Sensitive
Value
Unit
RF Input
+15
dBm
LO Input
+21
dBm
IF Input
+15
dBm
Operating Temperature
-40 to +85
ºC
Storage Temperature
-65 to +150
ºC
Appropriate precaution in handling, packaging
and testing devices must be observed.
Operation of this device beyond any one of these limits may
cause permanent damage. For reliable continuous operation the
device voltage and current must not exceed the maximum operating values specified in the table on page one.
The SPM-2045 mixer is a MOSFET based high performance mixer designed for high linearity frequency conversion in the
2GHz band. This mixer features a wide latitude in LO power requirements. Conversion loss remains quite constant between
10dBm and 20dBm of LO power. Third Order Intercept is approximately proportional to the LO drive. This means that this
mixer can be used to replace a wide variety of mixers requiring a variety of LO powers.
The graphs on the following pages illustrate the performance of the SPM-2045 over a variety of operating conditions. In
order to duplicate these performance tests, the following precautions should be observed:
-The mixer should be presented with good return losses at all ports by using isolators or attenuators. This is especially true
of the LO port, because of the poor return loss of this port. If ripple is seen in a frequency sweep, it is likely due to reflections
caused by poor VSWR in a cable leading up to the device.
-The presence of harmonics in the LO can cause changes in TOI.
-Be aware that signals of many different frequencies exist at the output of the mixer, and any one can potentially cause the
spectrum analyzer to generate intermod.
-When measuring TOI, make sure the two generators supplying the RF signal are not interacting, causing intermod themselves.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
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EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
Conversion Loss. vs Frequency, High Side LO,
Down-converter
Conversion Loss. vs Frequency, High Side LO
Up-converter
11
10
20dBm
9
17dBm
14dBm
8
7
1700
1800
1900
2000
2100
Conversion Loss
Conversion Loss
11
10
20dBm
9
17dBm
14dBm
8
7
1700
2200
1800
1900
Conversion Loss. Vs Frequency, Low Side LO
Down-converter
2200
11
10
20dBm
9
17dBm
14dBm
8
7
1700
1800
1900
2000
2100
Conversion Loss
Conversion Loss
2100
Conversion Loss. vs Frequency, Low Side LO
Up-converter
11
10
20dBm
9
17dBm
14dBm
8
7
1700
2200
1800
1900
2000
2100
2200
RF Frequency
RF Frequency
Conversion Loss vs. LO Power, Down-converter
RF=1900MHz, IF=150MHz
Conversion Loss vs. LO Power, Up-converter
RF=1900MHz, IF=150MHz
11
10
9
High side lo
Low side lo
8
7
5
10
15
20
Conversion Loss
11
Conversion Loss
2000
RF Frequency
RF Frequency
10
High side lo
9
Low side lo
8
7
5
LO Power, dBm
10
15
20
LO Power, dBm
These graphs show mixer conversion loss vs. frequency, with both low-side LO excitation (LO frequency below the RF frequency) and high side excitation (LO frequency above the RF frequency). Operation both as a down-converter and an upconverter is shown, with LO powers of 14, 17, and 20dBm. In all cases, the IF frequency is 150MHz.
522 Almanor Ave., Sunnyvale, CA 94085
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EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
TOI vs. Frequency, High Side LO
Down-converter
35
35
20dBm
17dBm
30
14dBm
25
1700
1800
1900
2000
2100
Input TOI, dBm
Input TOI, dBm
40
TOI vs. Frequency, High Side LO
Up-converter
30
20dBm
17dBm
25
14dBm
20
1700
2200
1800
1900
TOI vs. Frequency, Low Side LO
Down-converter
2200
35
35
20dBm
17dBm
30
14dBm
25
1700
1800
1900
2000
2100
Input TOI, dBm
Input TOI, dBm
2100
TOI vs. Frequency, Low Side LO
Up-converter
40
30
20dBm
17dBm
25
14dBm
20
1700
2200
1800
1900
2000
2100
2200
RF Freqyency
RF Frequency
TOI vs. LO Power, Down-converter
RF=1900MHz, IF=150MHz
TOI vs. LO Power, Up-converter
RF=1900MHz, IF=150MHz
40
40
35
35
30
High side lo
25
Low side lo
20
Input TOI, dBm
Input TOI, dBm
2000
RF Frequency
RF Frequency
30
High side lo
25
Low side lo
20
15
15
5
10
15
20
5
10
15
20
LO Power, dBm
LO Power, dBm
These graphs show mixer Third Order Intercept (TOI) vs. frequency referenced to the input of the mixer (that is, referenced
to the RF port in the case off a down-converter, or the IF port in the case of an up-converter), with both low-side LO excitation (LO frequency below the RF frequency) and high side excitation (LO frequency above the RF frequency). Operation
both as a down-converter and an up-converter is shown, with LO powers of 14, 17, and 20dBm. In all cases, the IF frequency is 150MHz. The RF power used in measuring third order intercept is +4dBm. Note that third order products closely
follow the expected 3:1 slope.
522 Almanor Ave., Sunnyvale, CA 94085
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EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
2400 Conversion Loss, dB
2300
Down-converter
2200
2100
10-10.5
10.5-11
9-9.5
2000 LO
Freq.
1900 MHz
1800
1700
8.5-9
1700
9-9.5
1600
8-8.5
1600
1500
7.5-8
2250
2100
1950
1800
7-7.5
1650
1500
9.5-10
24001
10.5-11
RF Freq. MHz
17dBm LO
8-8.5
7.5-8
7-7.5
32-34
30-32
28-30
26-28
1600
24-26
1500
22-24
2400
2250
2100
1950
1800
1500
2400
RF Freq. MHz
1650
26-28
1500
30-32
1700
28-30
1600
2250
2000 LO
Freq.
1900 MHz
1800
34-36
1700
2100
17dBm LO
2200
2100
2000 LO
Freq.
1900 MHz
1800
1950
8.5-9
2400 Input Intercept, dBm
2300
Up-converter
2100
1800
9.5-10
RF Freq. MHz
2200
1650
10-10.5
500
2400 Input Intercept, dBm
2300
Down-converter
1500
Conversion Loss, dB
Up-converter
17dBm LO
2000 LO
Freq.
1900 MHz
1800
2400
2250
2100
1950
1800
2100
1650
2300
17dBm LO
2200
1500
2400
RF Freq. MHz
TOI vs. Temperature
RF=1950MHz, L0=1800MHz, 17dBm
Insertion Loss vs. Temperature
RF=1950MHz, L0=1800MHz, 17dBm
9
Insertion Loss
Input TOI, dBm
32
31.5
31
30.5
8.5
8
7.5
7
30
-50
-30
-10
10
30
50
70
90
-50
-30
-10
10
30
50
70
90
Temperature
Temperature
The contour graphs show mixer input TOI and conversion loss over a variety of RF and LO frequencies. These contour
graphs can be used to assess the suitability of these mixers over a variety of frequencies of operation. Note that constant
IF frequency curves can be overlaid as diagonal lines. Also shown are graphs of TOI and insertion loss vs. temperature.
These curves were measured down-converter mode.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
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http://www.sirenza.com
EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
Isolation
LO Power = 17dBm
Half IF response
IF=200MHz, PLO=20dBm, PRF=10dBm
100
80
RF-IF
60
LO-RF
40
LO-IF
20
Isolation, dB
Isolation, dB
100
0
0
500
1000
1500
2000
2500
80
60
low side
40
high side
20
0
1500
3000
1700
1900
Frequency
Harmonics of LO at IF port
20dBm LO power, 2GHz.
2500
0
0
-10
-20
2nd Harmonic
-30
3rd Harmonic
-40
Harmonic Level, dBm
Harmonic Level, dBm
2300
Harmonics of LO to RF port
20dBm LO power, 2GHz
10
-50
-10
-20
2nd Harmonic
-30
3rd Harmonic
-40
-50
0
1000
2000
0
3000
1000
RF Port Return Loss
LO=2.0GHz, 17dBm
Reflection Coefficient, dB
-5
-10
-15
-20
500
1000
1500
2000
3000
IF Port Return Loss
LO=2.0GHz, 17dBm
0
0
2000
LO Frequency Fundamental, MHz
LO Frequency Fundamental, MHz
Reflection Coefficient, dB
2100
RF Frequency
2500
3000
3500
0
-5
-10
-15
-20
0
Frequency, MHz
100
200
300
400
500
600
Frequency, MHz
The isolation graph shows port isolation with a 2GHz LO at 17dB.
Half IF response is measured by applying RF signals (10dBm amplitude) 100MHz above or below the LO, and measuring
the level of the undesired IF component at 200MHz.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
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EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
C onversion Loss C ompression C urves
R F=1.95GH z , LO=1.75GH z , D ow nconversion
C onversion Loss C ompression C urves
R F=1.95GH z , LO=1.75GH z , U p-conversion
11
10
14dB m
9
17dB m
20dB m
8
7
Conversion Loss
Conversion Loss
11
10
14dB m
17dB m
9
20dB m
8
7
0
5
10
15
20
25
0
5
RF P ow e r, dBm
10
15
20
25
RIF P ow e r, dBm
LO Port Return Loss
LO=2.0GHz, 17dBm
Reflection Coefficient, dB
0
-5
-10
-15
-20
0
500
1000
1500
2000
2500
3000
Frequency, MHz
Package Dimensions
522 Almanor Ave., Sunnyvale, CA 94085
Part Number Ordering Information
Part Number
Reel Size
Devices/Reel
SPM-2045
13”
1000
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EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
Input IP3, +17 dBm LO Power, 150 MHz IF
With variation in RF port match
34
33
32
31
30
29
28
27
26
25
31
30
IIP3 (dBm)
29
1750 MHz
1800 MHz
1850 MHz
28
1750 MHz
1800 MHz
27
1850 MHz
26
30 cm
28 cm
26 cm
24 cm
22 cm
20 cm
18 cm
16 cm
14 cm
12 cm
8 cm
10 cm
6 cm
4 cm
25
2 cm
IIP3 (dBm)
Input IP3, SPM 2045, LO Power = +17 dBm
With variations in IF port match
24
0
2
4
6
8
10
12
14
16
18
20
22
Tuner Length (cm)
Trombone extension length
Sensitivity to Port Match
These graphs demonstrate the sensitivity of the linearity of the SPM-2045 to the impedance of the source which drives the
RF port, and the load that the IF port sees. In this case, the mixer is operated as a down-converter with LO drive of 17dBm
and an IF frequency of 150MHz. Three LO frequencies are shown.
In the left graph, a variable-length 50 ohm transmission line ("trombone") is placed between the IF port of the mixer and a 2
dB, open-circuited attenuator to provide a 4dB return loss to the IF port. The length of the transmission line is changed to
vary the phase of the reflection coefficient, thus providing a variable impedance. This graph shows how the input TOI varies
with the phase of the reflection coefficient. Notice that significant degradation in TOI can occur with mismatch, depending on
the phase of the mismatch.
In the right graph, a double-stub tuner is placed between the RF source and the mixer in order to provide a non-50 ohm
impedance to the RF port. The stub separation was adjusted to provide a reflection coefficient of approximately -4 dB. The
tuner length was changed to vary the phase of the reflection coefficient, thus providing a variable impedance. This graph
shows how the input TOI varies with the phase of the reflection coefficient on the RF port. Note that the TOI is very tolerant of
variations in load impedance, showing a change of only 3dB.
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
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EDS102972 Rev A
Preliminary Data Sheet
SPM-2045 High Linearity Mixer
Demo Test Board Schematic
SPM Evaluation Board
LO
RF
J1
J2
Sirenza
Microdevices
Mixer Eval Bd.
J3
IF
Recommended connectors:
Johnson 142-0701-851 SMA end-launch connectors (or equivalent)
522 Almanor Ave., Sunnyvale, CA 94085
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EDS102972 Rev A