Datasheet MAX2031 Datasheet (MAXIM)

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 particu­lar mixer is ideal for high-side LO injection architec­tures. 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 per­formance, the MAX2031 also yields a high level of com­ponent integration. This device includes a double­balanced passive mixer core, a dual-input LO selec­table 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 nomi­nal 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.

Applications

Features

♦ 650MHz to 1000MHz RF Frequency Range
♦ 650MHz to 1250MHz LO Frequency Range
♦ 570MHz to 900MHz LO Frequency Range

(Refer to the MAX2029 Data Sheet)

♦ DC to 250MHz IF Frequency Range
♦ 7dB Conversion Loss
♦ +36dBm Input IP3
♦ +27dBm Input 1dB Compression Point
♦ 7dB Noise Figure
♦ Integrated LO Buffer
♦ Integrated RF and LO Baluns
♦ Low -3dBm to +3dBm LO Drive
♦ Built-In SPDT LO Switch with 49dB LO1 to LO2

Isolation and 50ns Switching Time

♦ Pin Compatible with the MAX2039/MAX2041

1700MHz to 2200MHz Mixers

♦ External Current-Setting Resistor Provides Option

for Operating Mixer in Reduced-Power/Reduced­Performance Mode

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

________________________________________________________________

Maxim Integrated Products

1

19-0248; Rev 1; 6/09

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.

EVALUATION KIT

AVAILABLE

cdma2000 is a registered trademark of Telecommunications
Industry Association.
iDEN is a registered trademark of Motorola, Inc.
WiMAX is a trademark of WiMAX Forum.

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™ Base Stations
and Customer Premise
Equipment

Predistortion Receivers
Microwave and Fixed

Broadband Wireless
Access

Wireless Local Loop
Digital and Spread-

Spectrum
Communication Systems

Ordering Information

+

Denotes a lead(Pb)-free/RoHS-compliant package.

T= Tape and reel.

*

EP = Exposed pad.

MAX2031

TOP VIEW

4

5

3

2

12

11

13

LOBIAS

LOSEL

GND

14

V

CC

IF+

GND

GND

GND

67

TAP

910

20 19 17 16

GND

GND

V

CC

GND

GND

LO1

V

CC

IF-

8

18

RF

+

1

15

LO2

V

CC

E.P.

Pin Configuration/

Functional Diagram

PART TEMP RANGE PIN-PACKAGE

M AX 2031E TP + - 40°C to + 85° C 20 Thi n QFN- E P *

M AX 2031E TP + T- 40°C to + 85° C 20 Thi n QFN- E P *

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

VCCto 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

DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= 4.75V to 5.25V, no RF signals applied, TC= -40°C to +85°C. IF+ and IF- are DC grounded through an

IF balun. Typical values are at V

CC

= 5V, TC= +25°C, unless otherwise noted.)

RECOMMENDED AC OPERATING CONDITIONS

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

= TC+ (θJCx VCCx ICC). 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

= TA+ (θJAx VCCx ICC). 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. TAis the ambient temperature of the device and PCB.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I

LOSEL Input-Logic Low V

LOSEL Input-Logic High V

CC

CC

IL

IH

4.75 5.00 5.25 V

2V

85 100 mA

0.8 V

RF Frequency f

LO Frequency f

IF Frequency f

LO Drive Level P

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF

LO

IF

LO

C om p onents tuned for the 700M H z b and
( Tab l e 1) , C 1 = 7p F, C 5 = 3.3p F ( N otes 6, 7)

C om p onents tuned for the 800M H z/900M H z
cel l ul ar b and ( Tab l e 1) , C 1 = 82p F,
C 5 = 2.0p F ( N ote 6)

(Notes 6, 7) 650 1250 MHz

IF frequency range depends on external IF
transformer selection

(Note 6) -3 +3 dBm

650 850

800 1000

0 250 MHz

MHz

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (800MHz/900MHz CELLULAR BAND DOWNCON­VERTER 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, PLO= -3dBm to +3dBm, PRF= 0dBm, fRF= 815MHz to

1000MHz, f

LO

= 960MHz to 1180MHz, fIF= 160MHz, fLO> fRF, TC= -40°C to +85°C, unless otherwise noted. Typical values are at

V

CC

= 5V, PRF= 0dBm, PLO= 0dBm, fRF= 910MHz, fLO= 1070MHz, fIF= 160MHz, TC= +25°C, unless otherwise noted.) (Note 8)

Conversion Loss Lc 7.0 dB

Conversion Loss Flatness

Conversion Loss Variation Over
Temperature

Input Compression Point P

Input Third-Order Intercept Point IIP3

Input IP3 Variation Over
Temperature

Spurious Response at IF

Noise Figure NF Single sideband 7.0 dB

Noise Figure Under Blocking
(Note 11)

LO1-to-LO2 Isolation (Note 10)

Maximum LO Leakage at RF Port PLO = +3dBm -27 dBm

Maximum LO Leakage at IF Port PLO = +3dBm -35 dBm

LO Switching Time 50% of LOSEL to IF, settled within 2 degrees 50 ns

Minimum RF-to-IF Isolation 45 dB

RF Port Return Loss 17 dB

LO Port Return Loss

IF Port Return Loss LO driven at 0dBm, RF terminated into 50Ω 17 dB

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Flatness over any one of three frequency
bands (f
f

RF

f

RF

f

RF

TC = +25°C to -40°C -0.3

T

C

(Note 9) 27 dBm

1dB

f

RF1

P

RF

P

LO

IIP3

2 x 2 2LO - 2RF 72

3 x 3 3LO - 3RF 79

TC = +25°C to -40°C 0.3

T

C

P

BLOCKER

P

BLOCKER

LO2 selected, PLO = +3dBm, TC = +25°C 42 51

LO1 selected, P

LO1/LO2 port selected, LO2/LO1, RF, and IF
terminated into 50Ω

LO1/LO2 port unselected, LO2/LO1, RF, and
IF terminated into 50Ω

= 160MHz):

IF

= 827MHz to 849MHz
= 869MHz to 894MHz
= 880MHz to 915MHz

= +25°C to +85°C 0.2

= 910MHz, f

= 0dBm/tone, fLO = 1070MHz,

= 0dBm, TC = +25°C (Note 10)

= +25°C to +85°C -0.3

= +8dBm 15

= +12dBm 19

= 911MHz,

RF2

= +3dBm, TC = +25°C 42 49

LO

±0.18 dB

32 36 dBm

28

30

dB

dB

dBc

dB

dB

dB

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)

(

Typical Application Circuit

, L1 = 4.7nH, C4 = 6pF, C1 = 82pF, C5 not used, VCC= 4.75V to 5.25V, RF and LO ports are driven from

50Ω sources, P

LO

= -3dBm to +3dBm, PIF= 0dBm, fRF= 815MHz to 1000MHz, fLO= 960MHz to 1180MHz, fIF= 160MHz, fLO> fRF,

T

C

= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= 5V, PIF= 0dBm, PLO= 0dBm, fRF= 910MHz, fLO=

1070MHz, f

IF

= 160MHz, TC= +25°C, unless otherwise noted.) (Note 8)

Note 6: Operation outside this range is possible, but with degraded performance of some parameters.
Note 7: Not production tested.
Note 8: All limits include external component losses. Output measurements are taken at IF or RF port of the

Typical Application Circuit

.

Note 9: Compression point characterized. It is advisable not to continuously operate the mixer RF/IF inputs above +12dBm.
Note 10: Guaranteed by design.
Note 11: 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.

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, VCC=

4.75V to 5.25V, RF and LO ports driven from 50Ω sources, P

LO

= -3dBm to +3dBm, PRF= 0dBm, fRF= 650MHz to 850MHz, fLO=

790MHz to 990MHz, f

IF

= 140MHz, fLO> fRF, TC= +25°C, unless otherwise noted. Typical values are at VCC= 5V, PRF= 0dBm,

P

LO

= 0dBm, fRF= 750MHz, fLO= 890MHz, fIF= 140MHz, TC= +25°C, unless otherwise noted.) (Notes 8, 10)

Conversion Loss L

Input 1dB Compression Point P

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Third-Order Intercept Point IIP3

LO Leakage at IF Port PLO = +3dBm -33 -21 dBm

LO Leakage at RF Port PLO = +3dBm -20 -13 dBm

RF-to-IF Isolation 36 49 dB

2LO-2RF Spurious Response 2 x 2 40 72 dBc

3LO-3RF Spurious Response 3 x 3 65 82 dBc

Conversion Loss Lc 7.4 dB

Conversion Loss Flatness

Conversion Loss Variation Over
Temperature

Input Compression Point P

Input Third-Order Intercept Point IIP3

Input IP3 Variation Over
Temperature

LO ± 2IF Spur 64 dBc

LO ± 3IF Spur 83 dBc

Output Noise Floor P

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

C

1dB

fRF = 750MHz, PRF = 0dBm, PLO = 0dBm 27.7 dBm

= 749MHz, f

f

RF1

f

= 890MHz, PRF = 0dBm/tone,

LO

= 0dBm

P

LO

Flatness over any one of three frequency
bands (f
f

= 827MHz to 849MHz

RF

= 869MHz to 894MHz

f

RF

f

= 880MHz to 915MHz

RF

TC = +25°C to -40°C -0.3

T

= +25°C to +85°C 0.4

C

(Note 9) 27 dBm

1dB

= 160MHz, f

f

IF1

= 0dBm/tone, fLO = 1070MHz,

P

IF

P

= 0dBm, TC = +25°C (Note 10)

LO

IIP3

TC = +25°C to -40°C 1.2

= +25°C to +85°C -0.9

T

C

OUT

6.1 6.9 8.1 dB

= 750MHz,

RF2

= 160MHz):

IF

= 161MHz,

IF2

= 0dBm (Note 11) -167 dBm/Hz

32 37 dBm

±0.3 dB

32 36 dBm

dB

dB

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________

5

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, PLO= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 160MHz, TC= +25°C, unless otherwise noted.)

Downconverter Curves

5

6

8

7

9

10

CONVERSION LOSS vs. RF FREQUENCY

MAX2031 toc01

RF FREQUENCY (MHz)

CONVERSION LOSS (dB)

800 900850 950 1000

TC = -40°C

TC = +25°C

TC = -25°C

TC = +85°C

5

6

8

7

9

10

CONVERSION LOSS vs. RF FREQUENCY

MAX2031 toc02

RF FREQUENCY (MHz)

CONVERSION LOSS (dB)

800 900850 950 1000

PLO = -3dBm, 0dBm, +3dBm

5

6

8

7

9

10

CONVERSION LOSS vs. RF FREQUENCY

MAX2031 toc03

RF FREQUENCY (MHz)

CONVERSION LOSS (dB)

800 900850 950 1000

VCC = 4.75V, 5.0V, 5.25V

INPUT IP3 vs. RF FREQUENCY

40

PRF = 0dBm/TONE

38

36

34

32

INPUT IP3 (dBm)

30

28

26

800 850 900 950 1000

NOISE FIGURE vs. RF FREQUENCY

10

9

8

7

NOISE FIGURE (dB)

6

5

800 900850 950 1000

INPUT IP3 vs. RF FREQUENCY

40

PRF = 0dBm/TONE

38

36

34

32

30

28

26

800 850 900 950 1000

VCC = 5.25V

VCC = 4.75V

RF FREQUENCY (MHz)

VCC = 5.0V

NOISE FIGURE vs. RF FREQUENCY

10

9

8

7

6

5

800 900850 950 1000

VCC = 4.75V, 5.0V, 5.25V

RF FREQUENCY (MHz)

TC = +85°C, +25°C

RF FREQUENCY (MHz)

TC = +25°C

TC = -40°C

RF FREQUENCY (MHz)

TC = -40°C

TC = +85°C

TC = -25°C

TC = -25°C

MAX2031 toc04

MAX2031 toc07

INPUT IP3 vs. RF FREQUENCY

40

PRF = 0dBm/TONE

38

36

34

32

INPUT IP3 (dBm)

30

28

26

PLO = +3dBm

800 850 900 950 1000

RF FREQUENCY (MHz)

PLO = 0dBm

PLO = -3dBm

NOISE FIGURE vs. RF FREQUENCY

10

9

8

7

NOISE FIGURE (dB)

6

5

800 900850 950 1000

PLO = -3dBm, 0dBm, +3dBm

RF FREQUENCY (MHz)

MAX2031 toc05

INPUT IP3 (dBm)

MAX2031 toc08

NOISE FIGURE (dB)

MAX2031 toc06

MAX2031 toc09

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

6 _______________________________________________________________________________________

Downconverter Curves

45

55

75

65

85

95

2LO - 2RF RESPONSE

vs. RF FREQUENCY

MAX2031 toc10

RF FREQUENCY (MHz)

2LO - 2RF RESPONSE (dBc)

800 900850 950 1000

TC = -40°C

TC = +85°C

TC = +25°C

TC = -25°C

PRF = 0dBm

45

55

75

65

85

95

2LO - 2RF RESPONSE

vs. RF FREQUENCY

MAX2031 toc11

RF FREQUENCY (MHz)

2LO - 2RF RESPONSE (dBc)

800 900850 950 1000

PLO = +3dBm

PLO = -3dBm

PLO = 0dBm

PRF = 0dBm

45

55

75

65

85

95

2LO - 2RF RESPONSE

vs. RF FREQUENCY

MAX2031 toc12

RF FREQUENCY (MHz)

2LO - 2RF RESPONSE (dBc)

800 900850 950 1000

PRF = 0dBm

VCC = 4.75V, 5.0V

VCC = 5.25V

Typical Operating Characteristics (continued)

(

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, PLO= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 160MHz, TC= +25°C, unless otherwise noted.)

100

3LO - 3RF RESPONSE (dBc)

(dBm)

1dB

INPUT P

3LO - 3RF RESPONSE

vs. RF FREQUENCY

PRF = 0dBm

90

80

70

60

32

30

28

26

24

TC = +25°C

TC = +85°C

TC = -40°C, -25°C

800 900850 950 1000

RF FREQUENCY (MHz)

INPUT P

TC = +25°C

800 900850 950 1000

vs. RF FREQUENCY

1dB

TC = -40°C

TC = -25°C, +85°C

RF FREQUENCY (MHz)

100

MAX2031 toc13

90

80

70

3LO - 3RF RESPONSE (dBc)

60

800 900850 950 1000

32

MAX2031 toc16

30

(dBm)

1dB

28

INPUT P

26

24

800 900850 950 1000

3LO - 3RF RESPONSE

vs. RF FREQUENCY

PRF = 0dBm

PLO = 0dBm

RF FREQUENCY (MHz)

INPUT P

PLO = 0dBm, +3dBm

PLO = -3dBm

RF FREQUENCY (MHz)

PLO = -3dBm

PLO = +3dBm

vs. RF FREQUENCY

1dB

100

MAX2031 toc14

90

80

70

3LO - 3RF RESPONSE (dBc)

60

800 900850 950 1000

32

MAX2031 toc17

30

(dBm)

1dB

28

INPUT P

26

24

800 900850 950 1000

3LO - 3RF RESPONSE

vs. RF FREQUENCY

PRF = 0dBm

VCC = 5.25V

RF FREQUENCY (MHz)

INPUT P

VCC = 5.25V

VCC = 4.75V

RF FREQUENCY (MHz)

VCC = 5.0V

VCC = 4.75V

vs. RF FREQUENCY

1dB

VCC = 5.0V

MAX2031 toc15

MAX2031 toc18

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________

7

Downconverter Curves

Typical Operating Characteristics (continued)

(

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, PLO= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 160MHz, TC= +25°C, unless otherwise noted.)

LO SWITCH ISOLATION

vs. LO FREQUENCY

60

LO SWITCH ISOLATION

vs. LO FREQUENCY

60

60

LO SWITCH ISOLATION

vs. LO FREQUENCY

55

50

TC = +85°C

45

LO SWITCH ISOLATION (dB)

40

850 1050950 1150 1250

TC = -40°C, -25°C

TC = +25°C

LO FREQUENCY (MHz)

LO LEAKAGE AT IF PORT

vs. LO FREQUENCY

-20

TC = -40°C, -25°C

-30

-40

LO LEAKAGE (dBm)

-50

-60
960 10601010 1110 1160

TC = -40°C, -25°C

TC = +25°C

TC = +25°C

LO FREQUENCY (MHz)

TC = +85°C

TC = +85°C

LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

-15

-20

-25

TC = -40°C, -25°C

MAX2031 toc19

55

50

45

LO SWITCH ISOLATION (dB)

40

850 1050950 1150 1250

-20

MAX2031 toc22

-30

-40

LO LEAKAGE (dBm)

-50

-60
960 10601010 1110 1160

-15

-20

MAX2031 toc25

-25

PLO = -3dBm, 0dBm, +3dBm

LO FREQUENCY (MHz)

LO LEAKAGE AT IF PORT

vs. LO FREQUENCY

PLO = -3dBm, 0dBm, +3dBm

LO FREQUENCY (MHz)

LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

MAX2031 toc20

55

50

45

LO SWITCH ISOLATION (dB)

40

850 1050950 1150 1250

-20

MAX2031 toc23

-30

-40

LO LEAKAGE (dBm)

-50

-60
960 10601010 1110 1160

-15

-20

MAX2031 toc26

-25

VCC = 4.75V, 5.0V, 5.25V

LO FREQUENCY (MHz)

LO LEAKAGE AT IF PORT

vs. LO FREQUENCY

VCC = 5.25V

VCC = 4.75V

VCC = 5.0V

LO FREQUENCY (MHz)

LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

VCC = 5.25V

MAX2031 toc21

MAX2031 toc24

MAX2031 toc27

-30
TC = +85°C

-35

LO LEAKAGE AT RF PORT (dBm)

-40

-45

850 1050950 1150 1250

LO FREQUENCY (MHz)

TC = +25°C

-30
PLO = -3dBm, 0dBm, +3dBm

-35

LO LEAKAGE AT RF PORT (dBm)

-40

-45

850 1050950 1150 1250

LO FREQUENCY (MHz)

-30

-35

LO LEAKAGE AT RF PORT (dBm)

-40

-45
850 1050950 1150 1250

VCC = 4.75V

LO FREQUENCY (MHz)

VCC = 5.0V

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

8 _______________________________________________________________________________________

Downconverter Curves

30

40

35

50

45

55

60

800 900850 950 1000

RF-TO-IF ISOLATION

vs. RF FREQUENCY

MAX2031 toc28

RF FREQUENCY (MHz)

RF-TO-IF ISOLATION (dB)

TC = -40°C, -25°C

TC = +85°C

TC = +25°C

30

40

35

50

45

55

60

800 900850 950 1000

RF-TO-IF ISOLATION

vs. RF FREQUENCY

MAX2031 toc29

RF FREQUENCY (MHz)

RF-TO-IF ISOLATION (dB)

PLO = -3dBm

PLO = 0dBm

PLO = +3dBm

30

40

35

50

45

55

60

800 900850 950 1000

RF-TO-IF ISOLATION

vs. RF FREQUENCY

MAX2031 toc30

RF FREQUENCY (MHz)

RF-TO-IF ISOLATION (dB)

VCC = 4.75V, 5.0V, 5.25V

Typical Operating Characteristics (continued)

(

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, PLO= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 160MHz, TC= +25°C, unless otherwise noted.)

RF PORT RETURN LOSS

vs. RF FREQUENCY

0

5

10

15

20

RF PORT RETURN LOSS (dB)

PLO = -3dBm, 0dBm, +3dBm

25

30

750 850 900800 950 1000 1050

RF FREQUENCY (MHz)

LO SELECTED RETURN LOSS

vs. LO FREQUENCY

0

5

10

15

20

25

30

LO SELECTED RETURN LOSS (dB)

35

40

800 900 1000 1100 1200 1300

PLO = +3dBm

PLO = -3dBm

LO FREQUENCY (MHz)

PLO = 0dBm

0

INCLUDES IF TRANSFORMER

5

MAX2031 toc31

10

15

20

25

30

35

IF PORT RETURN LOSS (dB)

40

45

50

0 200100 300 400 500

LO UNSELECTED RETURN LOSS

0

10

MAX2031 toc34

20

30

40

50

LO UNSELECTED RETURN LOSS (dB)

60

800 1300

IF PORT RETURN LOSS

vs. IF FREQUENCY

VCC = 4.75V, 5.0V, 5.25V

IF FREQUENCY (MHz)

vs. LO FREQUENCY

PLO = -3dBm, 0dBm, +3dBm

1000900 1100 1200

LO FREQUENCY (MHz)

0

5

MAX2031 toc32

10

15

20

25

30

35

IF PORT RETURN LOSS (dB)

40

45

50

100

MAX2031 toc35

90

80

SUPPLY CURRENT (mA)

70

60

-40 10-15 35 60 85

IF PORT RETURN LOSS

vs. IF FREQUENCY

INCLUDES IF TRANSFORMER

PLO = -3dBm, 0dBm, +3dBm

0 200100 300 400 500

IF FREQUENCY (MHz)

SUPPLY CURRENT

vs.TEMPERATURE (T

VCC = 5.25V

VCC = 4.75V

TEMPERATURE (°C)

)

C

VCC = 5.0V

MAX2031 toc33

MAX2031 toc36

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________

9

Typical Operating Characteristics (continued)

(

Typical Application Circuit,

optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC=

5V, P

LO

= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 140MHz, TC= +25°C, unless otherwise noted.)

Downconverter Curves

CONVERSION LOSS vs. RF FREQUENCY

9

8

7

CONVERSION LOSS (dB)

6

T

= -40°C

C

5

650 850

TC = +85°C

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

40

P

= 0dBm/TONE

RF

38

TC = +25°C

36

34

INPUT IP3 (dBm)

TC = -40°C

32

CONVERSION LOSS vs. RF FREQUENCY

9

8

7

V

= 4.75V, 5.0V, 5.25V

CONVERSION LOSS (dB)

6

5

CC

650 850

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

40

PRF = 0dBm/TONE

38

V

= 5.25V

CC

36

34

INPUT IP3 (dBm)

32

VCC = 4.75V

VCC = 5.0V

800750700

TC = +25°C

TC = +25°C

800750700

TC = +85°C

9

MAX2031 toc37

MAX2031 toc40

8

7

CONVERSION LOSS (dB)

6

5

40

38

36

34

INPUT IP3 (dBm)

32

CONVERSION LOSS vs. RF FREQUENCY

P

= -3dBm, 0dBm, +3dBm

LO

650 850

RF FREQUENCY (MHz)

800750700

INPUT IP3 vs. RF FREQUENCY

P

= 0dBm/TONE

RF

PLO = -3dBm, 0dBm, +3dBm

MAX2031 toc38

MAX2031 toc41

MAX2031 toc39

MAX2031 toc42

30

650 850

RF FREQUENCY (MHz)

2LO-2RF RESPONSE

vs. RF FREQUENCY

85

75

TC = +85°C

65

2LO-2RF RESPONSE (dBc)

55

45

650 850

TC = +25°C

TC = -40°C

RF FREQUENCY (MHz)

800750700

P

RF

800750700

= 0dBm

30

85

MAX2031 toc43

75

65

2LO-2RF RESPONSE (dBc)

55

45

650 850

RF FREQUENCY (MHz)

800750700

2LO-2RF RESPONSE

vs. RF FREQUENCY

P

= 0dBm

RF

PLO = +3dBm

PLO = 0dBm

PLO = -3dBm

650 850

RF FREQUENCY (MHz)

800750700

30

650 850

85

MAX2031 toc44

75

65

2LO-2RF RESPONSE (dBc)

55

45

650 850

RF FREQUENCY (MHz)

2LO-2RF RESPONSE

vs. RF FREQUENCY

VCC = 4.75V, 5.0V, 5.25V

RF FREQUENCY (MHz)

800750700

P

RF

800750700

= 0dBm

MAX2031 toc45

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

10 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Application Circuit,

optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC=

5V, P

LO

= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 140MHz, TC= +25°C, unless otherwise noted.)

Downconverter Curves

3LO-3RF RESPONSE

vs. RF FREQUENCY

90

P

= 0dBmTC = +25°C

RF

90

MAX2031 toc46

3LO-3RF RESPONSE

vs. RF FREQUENCY

PRF = 0dBm

MAX2031 toc47

3LO-3RF RESPONSE

vs. RF FREQUENCY

90

VCC = 5.25V

PRF = 0dBm

80

70

3LO-3RF RESPONSE (dBc)

TC = +85°C

TC = -40°C

80

P

70

3LO-3RF RESPONSE (dBc)

LO

= -3dBm, 0dBm, +3dBm

80

70

3LO-3RF RESPONSE (dBc)

VCC = 4.75V

V

= 5.0V

CC

MAX2031 toc48

60

650

RF FREQUENCY (MHz)

INPUT P

30

29

TC = +25°C

28

(dBm)

1dB

27

INPUT P

26

25

650 850

vs. RF FREQUENCY

1dB

T

= -40°C

C

RF FREQUENCY (MHz)

LO LEAKAGE AT IF PORT

vs. LO FREQUENCY

-15

T

= -40°C

C

-25

800750700

TC = +85°C

800750700

850

MAX2031 toc49

MAX2031 toc52

60

650

RF FREQUENCY (MHz)

INPUT P

30

29

28

(dBm)

1dB

27

INPUT P

26

PLO = -3dBm

25

650 850

vs. RF FREQUENCY

1dB

PLO = +3dBm

P

= 0dBm

LO

RF FREQUENCY (MHz)

LO LEAKAGE AT IF PORT

vs. LO FREQUENCY

-15

-25
P

LO

= +3dBm

MAX2031 toc50

60

650

RF FREQUENCY (MHz)

INPUT P

30

29

28

(dBm)

1dB

27

INPUT P

26

25

650 850

vs. RF FREQUENCY

1dB

VCC = 5.0V

VCC = 4.75V

RF FREQUENCY (MHz)

V

= 5.25V

CC

800750700

800750700

850

MAX2031 toc51

800750700

800750700

850

LO LEAKAGE AT IF PORT

vs. LO FREQUENCY

-15

MAX2031 toc53

-25

V

CC

= 5.25V

MAX2031 toc54

-35

TC = +25°C

LO LEAKAGE AT IF PORT (dBm)

-45
790

TC = +85°C

LO FREQUENCY (MHz)

-35

LO LEAKAGE AT IF PORT (dBm)

940890840

990

-45
790

PLO = 0dBm

LO FREQUENCY (MHz)

PLO = -3dBm

940890840

990

-35

LO LEAKAGE AT IF PORT (dBm)

-45
790

VCC = 4.75V

LO FREQUENCY (MHz)

VCC = 5.0V

940890840

990

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

______________________________________________________________________________________

11

Typical Operating Characteristics (continued)

(

Typical Application Circuit,

optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC=

5V, P

LO

= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 140MHz, TC= +25°C, unless otherwise noted.)

Downconverter Curves

LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

-10

T

= -40°C

-15

-20

-25

LO LEAKAGE AT RF PORT (dBm)

-30
790 990

C

TC = +25°C

LO FREQUENCY (MHz)

2LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

-20

TC = -40°C

-25

TC = +85°C

940890840

LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

-10

MAX2031 toc55

-15

-20

-25

LO LEAKAGE AT RF PORT (dBm)

-30
790 990

P

= +3dBm

LO

PLO = 0dBm

LO FREQUENCY (MHz)

PLO = -3dBm

2LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

-20

MAX2031 toc58

-25

PLO = +3dBm

-10

MAX2031 toc56

-15

-20

-25

LO LEAKAGE AT RF PORT (dBm)

940890840

-30

-20

MAX2031 toc59

-25

LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

V

= 5.25V

CC

VCC = 5.0V

790 990

LO FREQUENCY (MHz)

VCC = 4.75V

940890840

2LO LEAKAGE AT RF PORT

vs. LO FREQUENCY

V

= 5.0V

VCC = 5.25V

CC

MAX2031 toc57

MAX2031 toc60

-30

TC = +25°C

-35

2LO LEAKAGE AT RF PORT (dBm)

-40
790 990

T

= +85°C

C

LO FREQENCY (MHz)

RF-TO-IF ISOLATION vs. RF FREQUENCY

60

TC = +85°C

50

T

= +25°C

40

RF-TO-IF ISOLATION (dB)

30

650 850

TC = -40°C

RF FREQUENCY (MHz)

C

-30

-35

2LO LEAKAGE AT RF PORT (dBm)

940890840

-40
790 990

P

= -3dBm

LO

LO FREQUENCY (MHz)

PLO = 0dBm

940890840

RF-TO-IF ISOLATION vs. RF FREQUENCY

60

MAX2031 toc61

50

P

= -3dBm, 0dBm, +3dBm

LO

40

RF-TO-IF ISOLATION (dB)

800750700

30

650

RF FREQUENCY (MHz)

800750700

850

-30

-35

2LO LEAKAGE AT RF PORT (dBm)

-40
790 990

RF-TO-IF ISOLATION vs. RF FREQUENCY

60

MAX2031 toc62

50

40

RF-TO-IF ISOLATION (dB)

30

650 850

LO FREQUENCY (MHz)

V

= 4.75V, 5.0V, 5.25V

CC

RF FREQUENCY (MHz)

VCC = 4.75V

940890840

MAX2031 toc63

800750700

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

12 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(

Typical Application Circuit,

optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC=

5V, P

LO

= 0dBm, PRF= 0dBm, fLO> fRF, fIF= 140MHz, TC= +25°C, unless otherwise noted.)

Downconverter Curves

RF PORT RETURN LOSS

vs. RF FREQUENCY

0

5

10

15

RF PORT RETURN LOSS (dB)

20

25

500 1000

P

LO

RF FREQUENCY (MHz)

= -3dBm, 0dBm, +3dBm

900800700600

LO UNSELECTED RETURN LOSS

0

10

0

MAX2031 toc64

vs. LO FREQUENCY

5

10

15

IF PORT RETURN LOSS (dB)

20

25

IF PORT RETURN LOSS

vs. IF FREQUENCY

fLO = 890MHz

V

= 4.75V, 5.0V, 5.25V

CC

50 350

IF FREQUENCY (MHz)

300250200150100

SUPPLY CURRENT

vs. TEMPERATURE (T

100

V

MAX2031 toc67

90

CC

MAX2031 toc65

10

20

30

LO SELECTED RETURN LOSS (dB)

40

= 5.25V

LO SELECTED RETURN LOSS

vs. LO FREQUENCY

0

P

= 0dBm

LO

PLO = -3dBm

600 1200

LO FREQUENCY (MHz)

)

C

MAX2031 toc68

PLO = +3dBm

1050900750

MAX2031 toc66

P

20

30

LO UNSELECTED RETURN LOSS (dB)

40

= -3dBm, 0dBm, +3dBm

LO

600 1200

LO FREQENCY (MHz)

1050900750

80

SUPPLY CURRENT (mA)

70

60

-40 85

= 4.75V

V

CC

TEMPERATURE (NC)

= 5.0V

V

CC

603510-15

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

______________________________________________________________________________________

13

Typical Operating Characteristics (continued)

(

Typical Application Circuit

, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC= 5.0V, PLO= 0dBm, PIF= 0dBm, fRF= f

LO

+ fIF, fIF= 160MHz,

T

C

= +25°C, unless otherwise noted.)

Upconverter Curves

CONVERSION LOSS vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

9

TC = +85°C

8

7

6

CONVERSION LOSS (dB)

TC = -40°C

5

CONVERSION LOSS vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

9

8

7

6

5

CONVERSION LOSS (dB)

4

TC = +25°C

TC = -25°C

CONVERSION LOSS vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

9

8

MAX2031 toc69

7

6

5

CONVERSION LOSS (dB)

4

PLO = -3dBm, 0dBm, +3dBm

MAX2031 toc70

VCC = 4.75V, 5.0V, 5.25V

MAX2031 toc71

4

750 850800 900 950 1000 1050

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

39

PIF = 0dBm/TONE

37

35

33

31

INPUT IP3 (dBm)

29

27

25

750 850 900800 950 1000 1050

TC = -25°C

TC = +85°C

RF FREQUENCY (MHz)

TC = +25°C

TC = -40°C

LO + 2IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

80

75

70

PIF = 0dBm

TC = -40°C, -25°C

TC = +25°C

3

750 850 900800 950 1000 1050

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

39

PIF = 0dBm/TONE

37

MAX2031 toc72

35

33

PLO = -3dBm, 0dBm, +3dBm

31

INPUT IP3 (dBm)

29

27

25

750 850 900800 950 1000 1050

RF FREQUENCY (MHz)

LO + 2IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

80

PIF = 0dBm

75

MAX2031 toc75

70

PLO = +3dBm

MAX2031 toc73

MAX2031 toc76

3

750 850 900800 950 1000 1050

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

39

PIF = 0dBm/TONE

37

35

33

31

INPUT IP3 (dBm)

29

27

25

VCC = 4.75V

750 850 900800 950 1000 1050

RF FREQUENCY (MHz)

VCC = 5.25V

VCC = 5.0V

LO + 2IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

80

PIF = 0dBm

75

70

VCC = 5.0V

VCC = 5.25V

MAX2031 toc74

MAX2031 toc77

65

60

LO + 2IF REJECTION (dBc)

55

50

910 1010 1060960 1110 1160 1210

LO FREQUENCY (MHz)

TC = +85°C

65

60

LO + 2IF REJECTION (dBc)

PLO = 0dBm

55

50

910 1010 1060960 1110 1160 1210

PLO = -3dBm

LO FREQUENCY (MHz)

65

60

LO + 2IF REJECTION (dBc)

55

50

910 1010 1060960 1110 1160 1210

VCC = 4.75V

LO FREQUENCY (MHz)

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

14 ______________________________________________________________________________________

Upconverter Curves

Typical Operating Characteristics (continued)

(

Typical Application Circuit

, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC= 5.0V, PLO= 0dBm, PIF= 0dBm, fRF= f

LO

+ fIF, fIF= 160MHz,

T

C

= +25°C, unless otherwise noted.)

LO - 2IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

80

PIF = 0dBm

75

70

TC = +85°C

LO - 2IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

80

75

70

TC = -40°C, -25°C

LO - 2IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

80

PIF = 0dBm

75

MAX2031 toc78

70

PLO = +3dBm

MAX2031 toc79

PIF = 0dBm

VCC = 5.25V

VCC = 5.0V

MAX2031 toc80

65

60

LO - 2IF REJECTION (dBc)

55

50

910 1010 1060960 1110 1160 1210

LO FREQUENCY (MHz)

TC = +25°C

LO + 3IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

90

PIF = 0dBm

80

TC = -40°C, -25°C, +25°C, +85°C

70

LO + 3IF REJECTION (dBc)

60

50

910 1060960 1010 1110 1160 1210

LO FREQUENCY (MHz)

LO - 3IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

90

80

PIF = 0dBm

TC = -40°C, -25°C, +25°C

65

60

LO - 2IF REJECTION (dBc)

PLO = -3dBm

55

50

910 1010 1060960 1110 1160 1210

PLO = 0dBm

LO FREQUENCY (MHz)

LO + 3IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

90

PIF = 0dBm

MAX2031 toc81

80

PLO = -3dBm, 0dBm, +3dBm

70

LO + 3IF REJECTION (dBc)

60

50

910 1060960 1010 1110 1160 1210

LO FREQUENCY (MHz)

LO - 3IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

90

PIF = 0dBm

MAX2031 toc84

80

65

60

LO - 2IF REJECTION (dBc)

55

50

910 1010 1060960 1110 1160 1210

VCC = 4.75V

LO FREQUENCY (MHz)

LO + 3IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

90

MAX2031 toc82

80

70

LO + 3IF REJECTION (dBc)

60

50

PIF = 0dBm

910 1060960 1010 1110 1160 1210

VCC = 5.25V

VCC = 4.75V, 5.0V

LO FREQUENCY (MHz)

LO - 3IF REJECTION vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

90

PIF = 0dBm

MAX2031 toc85

80

VCC = 5.25V

MAX2031 toc83

MAX2031 toc86

70

LO - 3IF REJECTION (dBc)

60

50

910 1060960 1010 1110 1160 1210

TC = +85°C

LO FREQUENCY (MHz)

70

LO - 3IF REJECTION (dBc)

60

50

PLO = -3dBm, 0dBm, +3dBm

910 1060960 1010 1110 1160 1210

LO FREQUENCY (MHz)

70

LO - 3IF REJECTION (dBc)

60

50

910 1060960 1010 1110 1160 1210

VCC = 4.75V

LO FREQUENCY (MHz)

VCC = 5.0V

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

______________________________________________________________________________________

15

Upconverter Curves

Typical Operating Characteristics (continued)

(

Typical Application Circuit

, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC= 5.0V, PLO= 0dBm, PIF= 0dBm, fRF= f

LO

+ fIF, fIF= 160MHz,

T

C

= +25°C, unless otherwise noted.)

LO LEAKAGE AT RF PORT vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

-15

LO LEAKAGE AT RF PORT vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

-15

LO LEAKAGE AT RF PORT vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

-15

-20

-25

-30

LO LEAKAGE AT RF PORT (dBm)

-35
910 1060960 1010 1110 1160 1210

TC = -40°C, -25°C

TC = +85°C

LO FREQUENCY (MHz)

TC = +25°C

IF LEAKAGE AT RF vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

-50

-60

-70

-80

IF LEAKAGE (dBm)

-90

-100
910 1010960 1060 1110 1160 1210

TC = +25°C

TC = -40°C, -25°C

TC = +85°C

LO FREQUENCY (MHz)

MAX2031 toc87

-20

-25

-30

LO LEAKAGE AT RF PORT (dBm)

-35

PLO = -3dBm, 0dBm, +3dBm

910 1060960 1010 1110 1160 1210

LO FREQUENCY (MHz)

IF LEAKAGE AT RF vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

-50

MAX2031 toc90

-60

-70

-80

IF LEAKAGE (dBm)

-90

-100
910 1010960 1060 1110 1160 1210

PLO = -3dBm

PLO = +3dBm

LO FREQUENCY (MHz)

PLO = 0dBm

MAX2031 toc88

-20

-25

-30

LO LEAKAGE AT RF PORT (dBm)

-35

VCC = 4.75V

910 1060960 1010 1110 1160 1210

VCC = 5.0V

LO FREQUENCY (MHz)

IF LEAKAGE AT RF vs. LO FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

-50

MAX2031 toc91

-60

-70

-80

IF LEAKAGE (dBm)

-90

-100

VCC = 5.0V

VCC = 4.75V

910 1010960 1060 1110 1160 1210

VCC = 5.25V

LO FREQUENCY (MHz)

MAX2031 toc89

VCC = 5.25V

MAX2031 toc92

RF PORT RETURN LOSS vs. RF FREQUENCY

(L-C BPF TUNED FOR 810MHz RF FREQUENCY)

0

5

L1 AND C4 BPF

10

INSTALLED

15

20

25

RF PORT RETURN LOSS (dB)

30

35

750 850 900800 950 1000 1050

L1 AND C4 BPF
REMOVED

THE OPTIONAL L-C BPF
ENHANCES PERFORMANCE
IN THE UPCONVERTER
MODE BUT LIMITS
RF BANDWIDTH

RF FREQUENCY (MHz)

MAX2031 toc93

MAX2031

Detailed Description

The MAX2031 can operate either as a downconverter or
an upconverter mixer that provides approximately 7dB of
conversion loss with a typical 7dB noise figure. IIP3 is
+36dBm for both upconversion and downconversion
modes. The integrated baluns and matching circuitry
allow for 50Ω single-ended interfaces to the RF port and
the two LO ports. The RF port can be used as an input
for downconversion or an output for upconversion. A sin­gle-pole, double-throw (SPDT) switch provides 50ns
switching time between the two LO inputs with 49dB of
LO-to-LO isolation. Furthermore, the integrated LO buffer
provides a high drive level to the mixer core, reducing
the LO drive required at the MAX2031’s inputs to a

-3dBm to +3dBm range. The IF port incorporates a dif­ferential output for downconversion, which is ideal for
providing enhanced IIP2 performance. For upconver­sion, the IF port is a differential input.

Specifications are guaranteed over broad frequency
ranges to allow for use in cellular band WCDMA,
cdmaOne™, cdma2000, and GSM 850/GSM 900 2.5G
EDGE base stations. The MAX2031 is specified to oper­ate over a 650MHz to 1000MHz RF frequency range, a
650MHz to 1250MHz LO frequency range, and a DC to
250MHz IF frequency range. Operation beyond these
ranges is possible; see the

Typical Operating

Characteristics

for additional details.

The MAX2031 is optimized for high-side LO injection
architectures. However, the device can operate in low-

side LO injection applications with an extended LO
range, but performance degrades as f

LO

decreases. See

the

Typical Operating Characteristics

for measurements
taken with fLObelow 960MHz. For a pin-compatible
device that has been optimized for LO frequencies below
960MHz, refer to the MAX2029.

RF Port and Balun

For using the MAX2031 as a downconverter, the RF
input is internally matched to 50Ω, requiring no external
matching components. A DC-blocking capacitor is
required because the input is internally DC shorted to
ground through the on-chip balun. For upconverter
operation, the RF port is a single-ended output similarly
matched to 50Ω.

LO Inputs, Buffer, and Balun

The MAX2031 is optimized for high-side LO injection
architectures with a 650MHz to 1250MHz LO frequency
range. For a device with a 570MHz to 900MHz LO fre­quency range, refer to the MAX2029. As an added fea­ture, the MAX2031 includes an internal LO SPDT switch
that can be used for frequency-hopping applications.
The switch selects one of the two single-ended LO
ports, allowing the external oscillator to settle on a par­ticular frequency before it is switched in. LO switching
time is typically less than 50ns, which is more than ade­quate for nearly all GSM applications. If frequency hop­ping is not employed, set the switch to either of the LO
inputs. The switch is controlled by a digital input
(LOSEL): logic-high selects LO2, logic-low selects LO1.

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

16 ______________________________________________________________________________________

Pin Description

cdmaOne is a trademark of CDMA Development Group.

PIN NAME FUNCTION

1, 6, 8, 14 V

2RFS i ng l e- E nd ed 50Ω RF Inp ut/O utp ut. Thi s p or t i s i nter nal l y m atched and D C shor ted to G N D thr oug h a b al un.

3 TAP Center Tap of the Internal RF Balun. Connect to ground.

4, 5, 10, 12,

13, 16, 17, 20

7 LOBIAS Bias Resistor for Internal LO Buffer. Connect a 523Ω ±1% resistor from LOBIAS to the power supply.

9 LOSEL Local Oscillator Select. Logic-control input for selecting LO1 or LO2.

11 LO1 Local Oscillator Input 1. Drive LOSEL low to select LO1.

15 LO2 Local Oscillator Input 2. Drive LOSEL high to select LO2.

18, 19 IF-, IF+ Differential IF Input/Outputs

—EP

GND Ground

Power-Supply Connection. Bypass each VCC pin to GND with capacitors as shown in the Typical

CC

Application Circuit.

Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses multiple
ground vias to provide heat transfer out of the device into the PCB ground planes. These multiple ground
vias are also required to achieve the noted RF performance.

To avoid damage to the part, voltage MUST be applied
to VCCbefore digital logic is applied to LOSEL (see the

Absolute Maximum Ratings

). LO1 and LO2 inputs are
internally matched to 50Ω, requiring an 82pF DC-block­ing capacitor at each input.

A two-stage internal LO buffer allows a wide input­power range for the LO drive. All guaranteed specifica­tions are for a -3dBm to +3dBm LO signal power. The
on-chip low-loss balun, along with an LO buffer, drives
the double-balanced mixer. All interfacing and match­ing components from the LO inputs to the IF outputs
are integrated on-chip.

High-Linearity Mixer

The core of the MAX2031 is a double-balanced, high­performance passive mixer. Exceptional linearity is pro­vided by the large LO swing from the on-chip LO buffer.

Differential IF

The MAX2031 mixer has a DC to 250MHz IF frequency
range. Note that these differential ports are ideal for pro­viding enhanced IIP2 performance. Single-ended IF
applications require a 1:1 balun to transform the 50Ω dif-
ferential IF impedance to 50Ω single-ended. Including
the balun, the IF return loss is better than 15dB. The dif­ferential IF is used as an input port for upconverter oper­ation. The user can use a differential IF amplifier following
the mixer, but a DC block is required on both IF pins.

Applications Information

Input and Output Matching

The RF and LO inputs are internally matched to 50Ω. No
matching components are required. As a downconvert­er, the return loss at the RF port is typically better than
15dB over the entire input range (650MHz to 1000MHz),
and return loss at the LO ports are typically 15dB
(960MHz to 1180MHz). RF and LO inputs require only
DC-blocking capacitors for interfacing (see Table 1).

An optional L-C bandpass filter (BPF) can be installed at
the RF port to improve upconverter performance. See
the

Typical Application Circuit

and

Typical Operating

Characteristics

for upconverter operation with an L-C
BPF tuned for 810MHz RF frequency. Performance can
be optimized at other frequencies by choosing different
values for L1 and C4. Removing L1 and C4 altogether
results in a broader match, but performance degrades.
Contact factory for details.

The IF output impedance is 50Ω (differential). For eval­uation, an external low-loss 1:1 (impedance ratio) balun
transforms this impedance to a 50Ω single-ended out­put (see the

Typical Application Circuit).

Bias Resistor

Bias current for the LO buffer is optimized by fine tun­ing resistor R1. If reduced current is required at the

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

______________________________________________________________________________________ 17

Table 1. Typical Application Circuit Component List

*

C4 and L1 installed only when mixer is used as an upconverter.

**

C5 installed only when mixer is used as a downconverter.

DESIGNATION QTY DESCRIPTION SUPPLIER

82pF microwave capacitor (0603).

C1 1

C2, C7, C8, C10,

C11, C12

C3, C6, C9 3 0.01µF microwave capacitors (0603) Murata Electronics North America, Inc.

C4* 1 6pF microwave capacitor (0603) —

C5** 1

L1* 1 4.7nH inductor (0603) —

R1 1 523Ω ±1% resistor (0603) Digi-Key Corp.

T1 1 MABAES0029 1:1 transformer (50:50) M/A-Com, Inc.

U1 1 MAX2031 IC (20 TQFN) Maxim Integrated Products, Inc.

Use for 800MHz/900MHz cellular band applications.

7pF microwave capacitor (0603).
Use for 700MHz band applications

6 82pF microwave capacitors (0603) Murata Electronics North America, Inc.

2pF microwave capacitor (0603).
Use for 800MHz/900MHz cellular band applications.

3.3pF microwave capacitor (0603).
Use for 700MHz band applications

Murata Electronics North America, Inc.

Murata Electronics North America, Inc.

MAX2031

expense of performance, contact the factory for details.
If the ±1% bias resistor values are not readily available,
substitute standard ±5% values.

Layout Considerations

A properly designed PC board is an essential part of
any RF/microwave circuit. Keep RF signal lines as short
as possible to reduce losses, radiation, and induc­tance. For the best performance, route the ground-pin
traces directly to the exposed pad under the package.
The PC board exposed pad MUST be connected to the
ground plane of the PC board. It is suggested that mul­tiple vias be used to connect this pad to the lower-level
ground planes. This method provides a good RF/ther­mal conduction path for the device. Solder the exposed
pad on the bottom of the device package to the PC
board. The MAX2031 evaluation kit can be used as a
reference for board layout. Gerber files are available
upon request at www.maxim-ic.com.

Power-Supply Bypassing

Proper voltage-supply bypassing is essential for high­frequency circuit stability. Bypass each VCCpin with
the capacitors shown in the

Typical Application Circuit

.

See Table 1.

Exposed Pad RF/Thermal Considerations

The exposed pad (EP) of the MAX2031’s 20-pin thin
QFN-EP package provides a low-thermal-resistance
path to the die. It is important that the PC board on
which the MAX2031 is mounted be designed to con­duct heat from the EP. In addition, provide the EP with
a low-inductance path to electrical ground. The EP
MUST be soldered to a ground plane on the PC board,
either directly or through an array of plated via holes.

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

18 ______________________________________________________________________________________

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/

Downconversion Mixer with LO Buffer/Switch

______________________________________________________________________________________ 19

Typical Application Circuit

Chip Information

PROCESS: SiGe BiCMOS

Package Information

For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages

.

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

20 Thin QFN-EP T2055+3

21-0140

RF

C3 C2

C1

L1

T1

1

3

C5

V

CC

IF+

GND

20+19 17 16

1

V

CC

2

TAP

GND

GND

RF

3

4

E.P.

5

67

CC

V

LOBIAS

V

CC

R1

C4

18

8

GND

IF-

MAX2031

910

CC

V

LOSEL

LOSEL

GND

GND

4

IF

5

C12

15

LO2

14

V

CC

13

GND

12

GND

11

LO1

C10

C11

LO2

V

LO1

CC

NOTE: L1 AND C4 USED ONLY FOR UPCONVERTER OPERATION.
C5 USED ONLY FOR DOWNCONVERTER OPERATION.

C6

C7

C8

V

CC

C9

MAX2031

High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

20

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

Revision History

REVISION

NUMBER

0 7/05 Initial release —

1 6/09 Added new Electrical Characteristics tables and Typical Operating Characteristics 1–16

REVISION

DATE

DESCRIPTION

PAGES

CHANGED