19-0248; Rev 1; 6/09
KIT
ATION
EVALU
BLE
AVAILA
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
General Description
The MAX2031 high-linearity passive upconverter or
downconverter mixer is designed to provide +36dBm
IIP3, 7dB NF, and 7dB conversion loss for a 650MHz to
1000MHz RF frequency range to support GSM/cellular
base-station transmitter or receiver applications. With a
650MHz to 1250MHz LO frequency range, this particu-
lar mixer is ideal for high-side LO injection architec-
tures. For a pin-to-pin-compatible mixer meant for
low-side LO injection, refer to the MAX2029.
In addition to offering excellent linearity and noise per-
formance, the MAX2031 also yields a high level of com-
ponent integration. This device includes a double-
balanced passive mixer core, a dual-input LO selec-
table switch, and an LO buffer. On-chip baluns are also
integrated to allow for a single-ended RF input for
downconversion (or RF output for upconversion), and
single-ended LO inputs. The MAX2031 requires a nomi-
nal LO drive of 0dBm, and supply current is guaranteed
to be below 100mA.
The MAX2031 is pin compatible with the MAX2039/
MAX2041 1700MHz to 2200MHz mixers, making this
family of passive upconverters and downconverters
ideal for applications where a common PC board layout
is used for both frequency bands.
The MAX2031 is available in a compact 20-pin thin
QFN package (5mm x 5mm) with an exposed pad.
Electrical performance is guaranteed over the extended
-40°C to +85°C temperature range.
Features
o
650MHz to 1000MHz RF Frequency Range
o
650MHz to 1250MHz LO Frequency Range
o
570MHz to 900MHz LO Frequency Range
(Refer to the MAX2029 Data Sheet)
o
DC to 250MHz IF Frequency Range
o
7dB Conversion Loss
o
+36dBm Input IP3
o
+27dBm Input 1dB Compression Point
o
7dB Noise Figure
o
Integrated LO Buffer
o
Integrated RF and LO Baluns
o
Low -3dBm to +3dBm LO Drive
o
Built-In SPDT LO Switch with 49dB LO1 to LO2
Isolation and 50ns Switching Time
o
Pin Compatible with the MAX2039/MAX2041
1700MHz to 2200MHz Mixers
o
External Current-Setting Resistor Provides Option
for Operating Mixer in Reduced-Power/Reduced-
Performance Mode
MAX2031
Ordering Information
PART
MAX2031ETP+
MAX2031ETP+T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 Thin QFN-EP*
20 Thin QFN-EP*
Applications
WCDMA/LTE and
cdma2000
®
Base
Stations
GSM 850/GSM 900 2G
and 2.5G EDGE Base
Stations
Integrated Digital
Enhanced Network
(iDEN
®
) Base Stations
WiMAX
(SM)
Base Stations
and Customer Premise
Equipment
Predistortion Receivers
Microwave and Fixed
Broadband Wireless
Access
Wireless Local Loop
Digital and Spread-
Spectrum
Communication Systems
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T= Tape and reel.
*EP
= Exposed pad.
Pin Configuration/
Functional Diagram
GND
GND
17
TOP VIEW
+
V
CC
RF
TAP
GND
GND
20
19
18
16
GND
IF+
IF-
1
2
3
4
E.P.
5
15
LO2
V
CC
GND
GND
LO1
MAX2031
14
13
12
11
6
V
CC
7
LOBIAS
8
V
CC
9
LOSEL
10
GND
cdma2000 is a registered trademark of Telecommunications
Industry Association.
iDEN is a registered trademark of Motorola, Inc.
WiMAX is a trademark of WiMAX Forum.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
MAX2031
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +5.5V
RF (RF is DC shorted to GND through a balun)..................50mA
LO1, LO2 to GND ..................................................-0.3V to +0.3V
IF+, IF- to GND ...........................................-0.3V to (V
CC
+ 0.3V)
TAP to GND ...........................................................-0.3V to +1.4V
LOSEL to GND ...........................................-0.3V to (V
CC
+ 0.3V)
LOBIAS to GND..........................................-0.3V to (V
CC
+ 0.3V)
RF, LO1, LO2 Input Power (Note 1) ...............................+20dBm
Continuous Power Dissipation (Note 2)....................................5W
θj
A
(Notes 3, 4)...............................................................+38°C/W
θj
C
(Notes 2, 3) ..............................................................+13°C/W
Operating Temperature Range (Note 5) .....T
C
= -40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Maximum, reliable, continuous input power applied to the RF and IF port of this device is +12dBm from a 50Ω source.
Note 2:
Based on junction temperature T
J
= T
C
+ (θ
JC
x V
CC
x I
CC
). This formula can be used when the temperature of the exposed
pad is known while the device is soldered down to a PCB. See the
Applications Information
section for details. The junction
temperature must not exceed +150°C.
Note 3:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
Note 4:
Junction temperature T
J
= T
A
+ (θ
JA
x V
CC
x I
CC
). This formula can be used when the ambient temperature of the PCB is
known. The junction temperature must not exceed +150°C.
Note 5:
T
C
is the temperature on the exposed pad of the package. T
A
is the ambient temperature of the device and PCB.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit,
V
CC
= 4.75V to 5.25V, no RF signals applied, T
C
= -40°C to +85°C. IF+ and IF- are DC grounded through an
IF balun. Typical values are at V
CC
= 5V, T
C
= +25°C, unless otherwise noted.)
PARAMETER
Supply Voltage
Supply Current
LOSEL Input-Logic Low
LOSEL Input-Logic High
SYMBOL
V
CC
I
CC
V
IL
V
IH
2
CONDITIONS
MIN
4.75
TYP
5.00
85
MAX
5.25
100
0.8
UNITS
V
mA
V
V
RECOMMENDED AC OPERATING CONDITIONS
PARAMETER
SYMBOL
CONDITIONS
Components tuned for the 700MHz band
(Table 1), C1 = 7pF, C5 = 3.3pF (Notes 6, 7)
RF Frequency
f
RF
Components tuned for the 800MHz/900MHz
cellular band (Table 1), C1 = 82pF,
C5 = 2.0pF (Note 6)
(Notes 6, 7)
IF frequency range depends on external IF
transformer selection
(Note 6)
MIN
650
TYP
MAX
850
MHz
800
650
0
-3
1000
1250
250
+3
MHz
MHz
dBm
UNITS
LO Frequency
IF Frequency
LO Drive Level
f
LO
f
IF
P
LO
2
_______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
AC ELECTRICAL CHARACTERISTICS (800MHz/900MHz CELLULAR BAND DOWNCON-
VERTER OPERATION)
(Typical
Application Circuit,
optimized for the
800MHz/900MHz cellular band (see Table 1),
C1 = 82pF, C5 = 2pF, L1 and C4 not
used, V
CC
= 4.75V to 5.25V, RF and LO ports driven from 50Ω sources, P
LO
= -3dBm to +3dBm, P
RF
= 0dBm, f
RF
= 815MHz to
1000MHz, f
LO
= 960MHz to 1180MHz, f
IF
= 160MHz, f
LO
> f
RF
, T
C
= -40°C to +85°C, unless otherwise noted. Typical values are at
V
CC
= 5V, P
RF
= 0dBm, P
LO
= 0dBm, f
RF
= 910MHz, f
LO
= 1070MHz, f
IF
= 160MHz, T
C
= +25°C, unless otherwise noted.) (Note 8)
PARAMETER
Conversion Loss
SYMBOL
Lc
Flatness over any one of three frequency
bands (f
IF
= 160MHz):
f
RF
= 827MHz to 849MHz
f
RF
= 869MHz to 894MHz
f
RF
= 880MHz to 915MHz
T
C
= +25°C to -40°C
T
C
= +25°C to +85°C
P
1dB
IIP3
(Note 9)
f
RF1
= 910MHz, f
RF2
= 911MHz,
P
RF
= 0dBm/tone, f
LO
= 1070MHz,
P
LO
= 0dBm, T
C
= +25°C (Note 10)
T
C
= +25°C to -40°C
T
C
= +25°C to +85°C
2LO - 2RF
3LO - 3RF
Single sideband
P
BLOCKER
= +8dBm
P
BLOCKER
= +12dBm
LO2 selected, P
LO
= +3dBm, T
C
= +25°C
LO1 selected, P
LO
= +3dBm, T
C
= +25°C
P
LO
= +3dBm
P
LO
= +3dBm
50% of LOSEL to IF, settled within 2 degrees
42
42
32
CONDITIONS
MIN
TYP
7.0
MAX
UNITS
dB
MAX2031
Conversion Loss Flatness
±0.18
dB
Conversion Loss Variation Over
Temperature
Input Compression Point
Input Third-Order Intercept Point
Input IP3 Variation Over
Temperature
Spurious Response at IF
Noise Figure
Noise Figure Under Blocking
(Note 11)
LO1-to-LO2 Isolation (Note 10)
Maximum LO Leakage at RF Port
Maximum LO Leakage at IF Port
LO Switching Time
Minimum RF-to-IF Isolation
RF Port Return Loss
-0.3
0.2
27
36
0.3
-0.3
72
79
7.0
15
19
51
49
-27
-35
50
45
17
dB
dBm
dBm
IIP3
2x2
3x3
NF
dB
dBc
dB
dB
dB
dBm
dBm
ns
dB
dB
LO Port Return Loss
LO1/LO2 port selected, LO2/LO1, RF, and IF
terminated into 50Ω
LO1/LO2 port unselected, LO2/LO1, RF, and
IF terminated into 50Ω
LO driven at 0dBm, RF terminated into 50Ω
28
dB
30
17
dB
IF Port Return Loss
_______________________________________________________________________________________
3
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
MAX2031
AC ELECTRICAL CHARACTERISTICS (700MHz BAND DOWNCONVERTER OPERATION)
(Typical
Application Circuit,
optimized for the
700MHz band (see Table 1),
C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, V
CC
=
4.75V to 5.25V, RF and LO ports driven from 50Ω sources, P
LO
= -3dBm to +3dBm, P
RF
= 0dBm, f
RF
= 650MHz to 850MHz, f
LO
=
790MHz to 990MHz, f
IF
= 140MHz, f
LO
> f
RF
, T
C
= +25°C, unless otherwise noted. Typical values are at V
CC
= 5V, P
RF
= 0dBm,
P
LO
= 0dBm, f
RF
= 750MHz, f
LO
= 890MHz, f
IF
= 140MHz, T
C
= +25°C, unless otherwise noted.) (Notes 8, 10)
PARAMETER
Conversion Loss
Input 1dB Compression Point
Input Third-Order Intercept Point
LO Leakage at IF Port
LO Leakage at RF Port
RF-to-IF Isolation
2LO-2RF Spurious Response
3LO-3RF Spurious Response
2x2
3x3
SYMBOL
L
C
P
1dB
IIP3
f
RF
= 750MHz, P
RF
= 0dBm, P
LO
= 0dBm
f
RF1
= 749MHz, f
RF2
= 750MHz,
f
LO
= 890MHz, P
RF
= 0dBm/tone,
P
LO
= 0dBm
P
LO
= +3dBm
P
LO
= +3dBm
36
40
65
32
CONDITIONS
MIN
6.1
TYP
6.9
27.7
37
-33
-20
49
72
82
-21
-13
MAX
8.1
UNITS
dB
dBm
dBm
dBm
dBm
dB
dBc
dBc
AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)
(Typical
Application Circuit,
L1 = 4.7nH, C4 = 6pF, C1 = 82pF, C5 not used, V
CC
= 4.75V to 5.25V, RF and LO ports are driven from
50Ω sources, P
LO
= -3dBm to +3dBm, P
IF
= 0dBm, f
RF
= 815MHz to 1000MHz, f
LO
= 960MHz to 1180MHz, f
IF
= 160MHz, f
LO
> f
RF
,
T
C
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 5V, P
IF
= 0dBm, P
LO
= 0dBm, f
RF
= 910MHz, f
LO
=
1070MHz, f
IF
= 160MHz, T
C
= +25°C, unless otherwise noted.) (Note 8)
PARAMETER
Conversion Loss
SYMBOL
Lc
Flatness over any one of three frequency
bands (f
IF
= 160MHz):
f
RF
= 827MHz to 849MHz
f
RF
= 869MHz to 894MHz
f
RF
= 880MHz to 915MHz
T
C
= +25°C to -40°C
T
C
= +25°C to +85°C
P
1dB
IIP3
(Note 9)
f
IF1
= 160MHz, f
IF2
= 161MHz,
P
IF
= 0dBm/tone, f
LO
= 1070MHz,
P
LO
= 0dBm, T
C
= +25°C (Note 10)
T
C
= +25°C to -40°C
T
C
= +25°C to +85°C
32
CONDITIONS
MIN
TYP
7.4
MAX
UNITS
dB
Conversion Loss Flatness
±0.3
dB
Conversion Loss Variation Over
Temperature
Input Compression Point
Input Third-Order Intercept Point
Input IP3 Variation Over
Temperature
LO ± 2IF Spur
LO ± 3IF Spur
Output Noise Floor
-0.3
0.4
27
36
1.2
-0.9
64
83
dB
dBm
dBm
IIP3
dB
dBc
dBc
dBm/Hz
P
OUT
= 0dBm (Note 11)
-167
Note 6:
Note 7:
Note 8:
Note 9:
Note 10:
Note 11:
Operation outside this range is possible, but with degraded performance of some parameters.
Not production tested.
All limits include external component losses. Output measurements are taken at IF or RF port of the
Typical Application Circuit.
Compression point characterized. It is advisable not to continuously operate the mixer RF/IF inputs above +12dBm.
Guaranteed by design.
Measured with external LO source noise filtered, so its noise floor is -174dBm/Hz. This specification reflects the effects of all
SNR degradations in the mixer, including the LO noise as defined in Application Note 2021:
Specifications and Measurements
of Local Oscilator Noise in Integrated Circuit Base Station Mixers.
4
_______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
MAX2031
Typical Operating Characteristics
(Typical
Application Circuit,
optimized for the
800MHz/900MHz cellular band (see Table 1),
C1 = 82pF, C5 = 2pF, L1 and C4 not used,
V
CC
= 5.0V, P
LO
= 0dBm, P
RF
= 0dBm, f
LO
> f
RF
, f
IF
= 160MHz, T
C
= +25°C, unless otherwise noted.)
Downconverter Curves
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc01
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc02
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc03
10
10
10
9
CONVERSION LOSS (dB)
T
C
= +85°C
T
C
= -25°C
T
C
= +25°C
9
CONVERSION LOSS (dB)
P
LO
= -3dBm, 0dBm, +3dBm
9
CONVERSION LOSS (dB)
V
CC
= 4.75V, 5.0V, 5.25V
8
8
8
7
7
7
6
T
C
= -40°C
6
6
5
800
850
900
950
1000
RF FREQUENCY (MHz)
5
800
850
900
950
1000
RF FREQUENCY (MHz)
5
800
850
900
950
1000
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
MAX2031 toc04
INPUT IP3 vs. RF FREQUENCY
P
RF
= 0dBm/TONE
P
LO
= +3dBm
MAX2031 toc05
INPUT IP3 vs. RF FREQUENCY
P
RF
= 0dBm/TONE
V
CC
= 5.25V
MAX2031 toc06
40
38
36
34
P
RF
= 0dBm/TONE
40
38
36
34
32
30
28
26
40
38
36
34
T
C
= +85°C, +25°C
P
LO
= 0dBm
INPUT IP3 (dBm)
INPUT IP3 (dBm)
T
C
= -40°C
32
T
C
= -25°C
30
28
26
800
850
900
950
RF FREQUENCY (MHz)
1000
P
LO
= -3dBm
INPUT IP3 (dBm)
V
CC
= 4.75V
32
30
28
26
V
CC
= 5.0V
800
850
900
950
RF FREQUENCY (MHz)
1000
800
850
900
950
RF FREQUENCY (MHz)
1000
NOISE FIGURE vs. RF FREQUENCY
MAX2031 toc07
NOISE FIGURE vs. RF FREQUENCY
MAX2031 toc08
NOISE FIGURE vs. RF FREQUENCY
MAX2031 toc09
10
10
10
9
T
C
= +25°C
NOISE FIGURE (dB)
8
T
C
= +85°C
9
NOISE FIGURE (dB)
9
NOISE FIGURE (dB)
8
8
7
7
P
LO
= -3dBm, 0dBm, +3dBm
6
7
V
CC
= 4.75V, 5.0V, 5.25V
6
6
T
C
= -40°C
5
800
850
900
950
1000
RF FREQUENCY (MHz)
T
C
= -25°C
5
800
850
900
950
1000
RF FREQUENCY (MHz)
5
800
850
900
950
1000
RF FREQUENCY (MHz)
_______________________________________________________________________________________
5
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