Maxim MAX2661EUT-T, MAX2660EUT-T, MAX2673EUA, MAX2671EUT-T, MAX2663EUT-T Datasheet

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General Description

The MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
miniature, low-cost, low-noise upconverter mixers are
designed for low-voltage operation and are ideal for
use in portable consumer equipment. Signals at the IF
input port are mixed with signals at the local oscillator
(LO) port using a double-balanced mixer. These
upconverter mixers operate with IF input frequencies
between 40MHz and 500MHz, and upconvert to output
frequencies as high as 2.5GHz.

These devices offer a wide range of supply currents and
output intercept levels to optimize system performance.
Supply current is essentially constant over the specified
supply voltage range. Additionally, when the devices are
in a typical configuration with V

SHDN

= 0, a shutdown

mode reduces the supply current to less than 1µA.

The MAX2660/MAX2661/MAX2663/MAX2671 are
offered in the space-saving 6-pin SOT23 package. For
applications requiring balanced IF ports, choose the
MAX2673 in the 8-pin µMAX package.

Applications

400MHz/900MHz/2.4GHz ISM

Hand-Held Radios

Wireless Local Area Networks (WLANs)

IEEE 802.11 and Wireless Data

Personal Communications Systems (PCS)

Cellular and Cordless Phones

Features

♦ RF Output Frequencies: 400MHz to 2.5GHz

♦ Low Noise Figure: 9.3dB (900MHz, MAX2671)

♦ +2.7V to +5.5V Single Supply

♦ High Output Intercept Point (OIP3)

5.9dBm at 4.8mA (MAX2660)

7.1dBm at 8.3mA (MAX2661)

0.7dBm at 3.0mA (MAX2663)

9.6dBm at 11.8mA (MAX2671)

7.6dBm at 20.5mA (MAX2673)

♦ 1µA Shutdown Mode

♦ Ultra-Small Surface-Mount Packaging

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

________________________________________________________________ Maxim Integrated Products 1

19-1382; Rev 1; 9/99

PART

MAX2660EUT-T

MAX2661EUT-T

MAX2663EUT-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP.

RANGE

PIN-

PACKAGE

6 SOT23-6

6 SOT23-6

6 SOT23-6

EVALUATION KIT MANUALS

FOLLOW DATA SHEET

Typical Operating Circuits and Functional Diagram appear at
end of data sheet.

Ordering Information

TOP

MARK

AAAF

AAAG

AAAL

MAX2671EUT-T

-40°C to +85°C 6 SOT23-6 AAAJ

MAX2673EUA

-40°C to +85°C 8 µMAX —

PART

I

CC

(mA)

OUTPUT IP3 (dBm)

AT 900MHz

GAIN (dB)

AT 2450MHz

LO BUFFER

SINGLE-ENDED OR

DIFFERENTIAL IF

PACKAGE

MAX2660 4.8 5.9 4.6 No Single Ended 6 SOT23

MAX2661 8.3 7.1 8.2 No Single Ended 6 SOT23

MAX2663 3.0 0.7 1.4 No Single Ended 6 SOT23

MAX2671 11.8 9.6 8.9 Yes Single Ended 6 SOT23

MAX2673 20.5 7.6 8.6 Yes Differential 8 µMAX

Selector Guide

Pin Configurations

GND

RFOUTIFIN

16SHDN

5 V

CC

LO

MAX2660
MAX2661
MAX2663
MAX2671

SOT23-6

TOP VIEW

2

34

GND

RFOUTV

CC

1

2

87IFIN+

IFIN-GND

SHDN

LO

µMAX

3

4

6

5

MAX2673

TBD

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, SHDN = +2V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= SHDN = +3.0V,
T

A

= +25°C. Minimum and maximum values are guaranteed over temperature by design and characterization.)

AC ELECTRICAL CHARACTERISTICS

(VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)

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 +6.0V

IFIN_ Input Power (50Ω source).....................................+10dBm

LO Input Power (50Ω source) ........................................+10dBm

SHDN, RFOUT, IFIN_, LO to GND..............-0.3V to (V

CC

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW

6-Pin SOT23-6 (derate 8.7mW/°C above +70°C) ........696mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°C

MAX2663

MAX2661

MAX2660

SHDN = 0.5V, VCC= 3.6V to 5.5V

MAX2671

MAX2673

SHDN = 0.5V, VCC= 2.7V to 3.6V

CONDITIONS

3.0 4.1

8.3 11.3

4.8 6.6

I

CC

Operating Supply Current
(LO and IFIN_ Unconnected)

-5 0.2 5I

IN

Shutdown Input Bias Current

0 0.5V

IL

Shutdown Input Voltage Low

2V

CC

V

IH

Shutdown Input Voltage High

15

11.8 16.6

20.5 26.8

5

MIN TYP MAXSYMBOLPARAMETER

µA

V

V

mA

UNITS

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 45MHz, fLO= 445MHz, fRF= 400MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz,
T

A

= -40°C to +85°C

CONDITIONS

7.0

7.0

5.7

5.9

Output Third-Order
Intercept

3.9 5.9 8.1

Conversion Gain

4.6

±1.2 ±1.6

Gain Variation Over
Temperature

MIN TYP MAXPARAMETER

dBm

dB

dB

UNITS

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

4.1

MAX2660 (PLO= -5dBm, P

IFIN

= -30dBm, Circuit of Figure 1)

µAI

CC

Shutdown Supply Current

SHDN = GND, MAX2660

0.1

SHDN = GND, MAX2673

0.8

SHDN = GND, MAX2661

0.2

SHDN = GND, MAX2663

0.1

SHDN = GND, MAX2671

0.2

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

_______________________________________________________________________________________ 3

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

f

IF

= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz,
TA= -40°C to +85°C

From SHDN low to ICC< 100µA

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

(Note 2)

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz (Note 1)

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

f = 600MHz to 2500MHz, 50Ω source impedance

fIF= 45MHz, fLO= 445MHz, fRF= 400MHz

CONDITIONS

11.6

9.8

Noise Figure
(Single Sideband)

-6.2

-7.2

-6.0

Output 1dB
Compression Point

7.3

6.0

7.1

Output Third-Order Intercept

±1.2 ±1.5

Gain Variation Over
Temperature

8.2

Conversion Gain

7.0 8.5 10.2

10.7

10.2

-10.8

-8.4

Output 1dB
Compression Point

2

Turn-Off Time

2

Turn-On Time

-70

Maximum Output Spurious
Emissions

-20.7

LO Emission from RF Port

-22.5

2.2

Maximum LO Input VSWR

MIN TYP MAXPARAMETER

From SHDN low to ICC< 100µA

(Note 2)

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz (Note 1)

f = 600MHz to 2500MHz, 50Ω source impedance

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 350MHz, fLO= 2100MHz, fRF= 2450MHz

2

Turn-Off Time

2

Turn-On Time

-57.3

Maximum Output Spurious
Emissions

2.2

Maximum LO Input VSWR

-23.5

LO Emission from RF Port

-21.6

-22.9

11.8

µs

µs

dBm

dBm

dB

dBm

dBm

dB

dB

µs

µs

dBm

dBm

dBm

UNITS

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 350MHz, fLO= 2100MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 970MHz, fRF= 1900MHz

-22.0

11.9

9.9

dB

Noise Figure
(Single Sideband)

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

11.8

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

-11.4

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)

MAX2660 (PLO= -5dBm, P

IFIN

= -30dBm, Circuit of Figure 1) (continued)

MAX2661 (PLO= -5dBm, P

IFIN

= -30dBm, Circuit of Figure 1)

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

4 _______________________________________________________________________________________

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

f

IF

= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz,
T

A

= -40°C to +85°C

fIF

= 240MHz, f

LO

= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 45MHz, fLO= 445MHz, fRF= 400MHz

CONDITIONS

12.2

10.7

Noise Figure
(Single Sideband)

-14.3

-13.3

-12.3

Output 1dB
Compression Point

-2.8

-1.4

0.7

Output Third-Order Intercept

±1.1 ±1.8

Gain Variation Over
Temperature

1.4

Conversion Gain

-0.1 2.1 4.2

3.4

2.0

MIN TYP MAXPARAMETER

From SHDN low to ICC< 100µA

(Note 2)

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz (Note 1)

f = 600MHz to 2500MHz, 50Ω source impedance

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 350MHz, fLO= 2100MHz, fRF= 2450MHz

2

Turn-Off Time

2

Turn-On Time

-67

Maximum Output Spurious
Emissions

2.1

Maximum LO Input VSWR

-21.6

LO Emission from

RF Port

-21.0

-22.7

12.7

µs

µs

dBm

dBm

dB

dBm

dBm

dB

dB

UNITS

fIF= 45MHz, fLO= 445MHz, fRF= 400MHz

10.0

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

11.2

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

6.7 9.3 11.9

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

8.9

Conversion Gain dB

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz,
T

A

= -40°C to +85°C

±1.1 ±1.3

Gain Variation Over
Temperature

dB

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

9.6

f

IF

= 70MHz, fLO= 1830MHz, fRF= 1900MHz

8.3

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

9.4

Output Third-Order Intercept dBm

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

-5.5

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

-6.4

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

-6.0

Output 1dB
Compression Point

dBm

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)

MAX2663 (PLO= -5dBm, P

IFIN

= -30dBm, Circuit of Figure 1)

MAX2671 (PLO= -10dBm, P

IFIN

= -30dBm, Circuit of Figure 1)

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

_______________________________________________________________________________________ 5

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 45MHz, fLO= 445MHz, fRF= 400MHz

12.6

dB

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

12.3

CONDITIONS

10.7

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

7.8 9.2 10.6

9.3

Noise Figure
(Single Sideband)

f

IF = 240MHz, f

LO

= 2210MHz, fRF= 2450MHz

8.6

Conversion Gain

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz,
TA= -40°C to +85°C

±1.0 ±1.4

Gain Variation Over
Temperature

dB

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

7.6

dBmfIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

5.9

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

4.5

Output Third-Order Intercept

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

-2.1

dBmfIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

-5.9

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

-8.3

Output 1dB
Compression Point

MIN TYP MAXPARAMETER

From SHDN low to ICC< 100µA

(Note 2)

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz (Note 1)

f = 600MHz to 2500MHz, 50Ω source impedance

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

fIF= 350MHz, fLO= 2100MHz, fRF= 2450MHz

2

Turn-Off Time

2

Turn-On Time

-56

Maximum Output Spurious
Emissions

2.2

Maximum LO Input VSWR

-36.8

LO Emission from RF Port

-35.7

-40.3

11.3

µs

µs

dBm

dBm

dBm

dB

UNITS

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

9.7

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

10.1

fIF= 350MHz, fLO= 2100MHz, fRF= 2450MHz

10.4

Noise Figure
(Single Sideband)

dB

fIF= 70MHz, fLO= 970MHz, fRF= 900MHz

-29.4

dBmfIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz

-27.9

fIF= 240MHz, fLO= 2210MHz, fRF= 2450MHz

-26.6

LO Emission from RF Port

f = 600MHz to 2500MHz, 50Ω source impedance

2.2

fIF= 70MHz, fLO= 1830MHz, fRF= 1900MHz (Note 1)

-59.7

dBm

(Note 2)

2

Maximum LO Input VSWR

µsTurn-On Time

Maximum Output Spurious
Emissions

From SHDN low to ICC< 100µA

2

µsTurn-Off Time

AC ELECTRICAL CHARACTERISTICS (continued)

(VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)

MAX2671 (PLO= -10dBm, P

IFIN

= -30dBm, Circuit of Figure 1) (continued)

MAX2673 (PLO= -10dBm, P

IFIN_

= -30dBm, Circuit of Figure 2)

Note 1: Excluding LO harmonics and products of LO harmonics by first-order IF.
Note 2: From SHDN high to output within 1dB of final output power, f

RF

= 900MHz, fIF= 70MHz.

15

17

16

19

18

21

20

22

24

23

25

500 1000 1500 2000 2500

MAX2660

LO-to-RF AND RF-to-LO ISOLATION

vs. LO OR RF FREQUENCY

MAX2660-09

LO OR RF FREQUENCY (MHz)

ISOLATION (dB)

RF-to-LO ISOLATION
POWER INTO RF PORT = -25dBm

LO-to-RF ISOLATION
POWER INTO LO PORT = -5dBm

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

6 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(VCC= SHDN = +3.0V, Typical Operating Circuits, PLO= -5dBm (MAX2660/MAX2661/MAX2663), PLO= -10dBm (MAX2671/MAX2673),
P

IFIN

= -30dBm, TA= +25°C, unless otherwise noted.)

-2

0

-1

2

1

4

3

5

7

6

8

0 100 200 300 400 50050 150 250 350 450

MAX2660

CONVERSION GAIN vs. IF FREQUENCY

MAX2660-04

IF FREQUENCY (MHz)

CONVERSION GAIN (dB)

900MHz
1900MHz
2450MHz

f

RF

fIF = fLO - f

RF

fIF = fRF - f

LO

fIF = fRF - f

LO

f

IF

fRF = 1900MHz

fRF = 900MHz

fRF = 2450MHz

-15

-10

0

-5

5

10

-25 -15-20 -10 -5 0 5 10

MAX2660

CONVERSION GAIN vs. LO POWER

MAX2660-05

LO POWER (dBm)

CONVERSION GAIN (dB)

900MHz
1900MHz
2450MHz

f

RF

970MHz
1830MHz
2210MHz

f

LO

70MHz
70MHz
240MHz

f

IF

fRF = 2450MHz

fRF = 1900MHz

fRF = 900MHz

-20

-16

-18

-12

-14

-8

-10

-6

-2

-4

0

300 1380840 1920 2460 3000

MAX2660

LO PORT RETURN LOSS vs. FREQUENCY

MAX2660-06

LO FREQUENCY (MHz)

RETURN LOSS (dB)

0

100

50

150

350

300

450

400

250

200

500

0 100 200 300 400 500

MAX2660

IF PORT IMPEDANCE vs. IF FREQUENCY

MAX2660-07

IF FREQUENCY (MHz)

REAL IMPEDANCE (Ω)

-500

-200

-100

-300

-400

0

IMAGINARY IMPEDANCE (Ω)

IMAGINARY

REAL

0

200

100

400

300

800

700

600

500

900

0 1000500 1500 2000 2500 3000

MAX2660

RF PORT IMPEDANCE vs. RF FREQUENCY

MAX2660-08

RF FREQUENCY (MHz)

REAL IMPEDANCE (Ω)

-1000

-500

-600

-700

-800

-900

-300

-400

-100

-200

IMAGINARY IMPEDANCE (Ω)

REAL

IMAGINARY

SUPPLY CURRENT vs. SUPPLY VOLTAGE

6.0

5.5

5.0

(mA)

4.5

CC

I

4.0

3.5

3.0

2.50 3.50 4.003.00 4.50 5.00 5.50

MAX2660

TA = +85°C

TA = +25°C

TA = -40°C

VCC (V)

MAX2660-01

SHUTDOWN SUPPLY CURRENT

10

SHDN = GND

9

8

7

6

5

4

3

2

SHUTDOWN SUPPLY CURRENT (µA)

1

0

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2660

vs. SUPPLY VOLTAGE

TA = +85°C

TA = +25°C

TA = -40°C

SUPPLY VOLTAGE (V)

10

MAX2660-02

8

6

4

2

0

-2

-4

CONVERSION GAIN (dB)

-6

-8

-10

CONVERSION GAIN vs. RF FREQUENCY

MAX2660

2.7V

2.7V

5.5V

5.5V

RF MATCH

400MHz
900MHz
1900MHz
2450MHz

0

1000500 1500 2000 2500 3000
RF FREQUENCY (MHz)

2.7V

5.5V

f

RF

fRF = fLO - f
fRF = fLO - f
fRF = fLO + f
fRF = fLO + f

IF
IF

IF
IF

f

IF

45MHz
70MHz
70MHz
240MHz

2.7V

5.5V

MAX2660-03

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(VCC= SHDN = +3.0V, Typical Operating Circuits, PLO= -5dBm (MAX2660/MAX2661/MAX2663), PLO= -10dBm (MAX2671/MAX2673),
P

IFIN

= -30dBm, TA= +25°C, unless otherwise noted.)

MAX2660

CONVERSION GAIN AND OUTPUT

POWER vs. IF INPUT POWER

10

0

fRF = 900MHz

fRF = 1900MHz

-10

-20

-30

-40

-50

OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)

fRF = 900MHz

fRF = 1900MHz

-50 -30-40 -20 -10 0
IF INPUT POWER (dBm)

fRF = 2450MHz

fRF = 2450MHz

f

RF

900MHz
1900MHz
2450MHz

CONVERSION GAIN

OUTPUT POWER

f

f

IF

LO

70MHz

970MHz

70MHz

1830MHz

240MHz

2210MHz

MAX2660-10

MAX2661

CONVERSION GAIN vs. RF FREQUENCY

12

10

8

6

4

VCC = 2.7V

2

CONVERSION GAIN (dB)

0

-2

-4
0

VCC = 5.5V

VCC = 2.7V

RF MATCH

400MHz
900MHz
1900MHz
2450MHz

1000500 1500 2000 2500 3000
RF FREQUENCY (MHz)

f

fRF = fLO - f
fRF = fLO - f
fRF = fLO + f
fRF = fLO + f

f

IF

RF

45MHz

IF

70MHz

IF

70MHz

IF

240MHz

IF

MAX2661toc03

MAX2661

LO PORT RETURN LOSS vs. FREQUENCY

2

0

-2

-4

-6

-8

-10

RETURN LOSS (dB)

-12

-14

-16

-18
250 800 1350 1900 2450 3000

LO FREQUENCY (MHz)

MAX2661toc06

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX2661

10.0

9.5

9.0

8.5

8.0

7.5

SUPPLY CURRENT (mA)

7.0

6.5

6.0

2.5 3.53.0 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)

MAX2661

CONVERSION GAIN vs. IF FREQUENCY

12

10

8

6

4

CONVERSION GAIN (dB)

2

0

0 20015050 100 250 300 350 400 450 500

fRF = 2450MHz

IF FREQUENCY (MHz)

f

RF

900MHz
1900MHz
2450MHz

fRF = 900MHz

fRF = 1900MHz

fIF = fLO - f
fIF = fRF - f
fIF = fRF - f

MAX2661

IF PORT IMPEDANCE vs. IF FREQUENCY

800

700

600

500

400

300

REAL IMPEDANCE (Ω)

200

100

0

0 100 150 200 25050 300 350 400 450 500

IF FREQUENCY (MHz)

IMAGINARY

REAL

TA = +85°C

TA = +25°C

TA = -40°C

f

IF

MAX2661toc07

SHUTDOWN SUPPLY CURRENT

10

9

MAX2661toc01

SHUTDOWN SUPPLY CURRENT (µA)

SHDN = GND

8

7

6

5

4

3

2

1

0

2.5 3.53.0 4.0 4.5 5.0 5.5

CONVERSION GAIN vs. LO POWER

15

MAX2661toc04

10

fRF = 1900MHz

5

0

CONVERSION GAIN (dB)

RF
LO
LO

-5

-10

-25 -15-20 -10 -5 0 5 10

RF PORT IMPEDANCE vs. RF FREQUENCY

900

0

800

-50

700

-100
600

-150
500

-200
400

-250
300

REAL IMPEDANCE (Ω)

-300
200

-350
100

-400

0

0 500 1000 1500 2000 2500 3000

MAX2661

vs. SUPPLY VOLTAGE

TA = +85°C

TA = +25°C

TA = -40°C

SUPPLY VOLTAGE (V)

MAX2661

fRF = 900MHz

fRF = 2450MHz

f

RF

900MHz
1900MHz
2450MHz

f

LO

970MHz
1830MHz
2210MHz

LO POWER (dBm)

MAX2661

IMAGINARY

REAL

RF FREQUENCY (MHz)

f

IF

70MHz
70MHz
240MHz

MAX2661toc08

MAX2661toc02

MAX2661toc05

-100

-200

-300

-400

-500

-600

-700

-800

-900

-1000

IMAGINARY IMPEDANCE (Ω)

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= SHDN = +3.0V, Typical Operating Circuits, PLO= -5dBm (MAX2660/MAX2661/MAX2663), PLO= -10dBm (MAX2671/MAX2673),
P

IFIN

= -30dBm, TA= +25°C, unless otherwise noted.)

10

12

14

16

22

24

18

20

26

28

30

500 1000750 1250 1500 1750 2000 2250 2500

MAX2661

LO-to-RF AND RF-TO-LO ISOLATION

vs. LO OR RF FREQUENCY

MAX2661toc09

LO OR RF FREQUENCY (MHz)

ISOLATION (dB)

LO-TO-RF ISOLATION
POWER INTO LO PORT = -5dBm

RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm

900MHz
1900MHz
2450MHz

970MHz
1830MHz
2210MHz

70MHz
70MHz
240MHz

f

RF

f

LO

f

IF

-35

-5

0

-10

-25

-30

-20

-15

5

10

15

-40 -25 -20 -10 -5-30-35 -15 0

MAX2661

CONVERSION GAIN AND OUTPUT

POWER vs. IF INPUT POWER

MAX2661toc10

IF INPUT POWER (dBm)

OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)

900MHz
1900MHz
2450MHz

f

RF

970MHz
1830MHz
2210MHz

f

LO

70MHz
70MHz
240MHz

f

IF

fRF = 900MHz

fRF = 1900MHz

fRF = 2450MHz

fRF = 900MHz

fRF = 1900MHz

fRF = 2450MHz

CONVERSION GAIN

OUTPUT POWER

1.0

2.0

1.5

3.0

2.5

3.5

4.0

2.5 3.5 4.03.0 4.5 5.0 5.5

MAX2663

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX2663toc1

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = -40°C

TA = +25°C

TA = +85°C

0

3

2

1

4

5

6

7

8

9

10

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2663

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX2663toc02

SUPPLY VOLTAGE (V)

SHUTDOWN SUPPLY CURRENT (µA)

TA = +85°C

TA = +25°C

TA = -40°C

SHDN = GND

-10

-6

-8

0

-2

-4

4

2

6

-25 -15-20 -10 -5 0 5 10

MAX2663

CONVERSION GAIN vs. LO POWER

MAX2663toc05

LO POWER (dBm)

CONVERSION GAIN (dB)

fRF = 2450MHz

fRF = 900MHz

fRF = 1900MHz

900MHz
1900MHz
2450MHz

970MHz
1830MHz
2210MHz

70MHz
70MHz
240MHz

f

RF

f

LO

f

IF

-10

-6

-8

-2

-4

0

4

2

6

0

1000500 1500 2000 2500 3000

MAX2663

CONVERSION GAIN vs. RF FREQUENCY

MAX2663toc03

RF FREQUENCY (MHz)

CONVERSION GAIN (dB)

VCC = +2.7V

400MHz
900MHz
1900MHz
2450MHz

RF MATCH

45MHz
70MHz
70MHz
240MHz

f

IF

fRF = fLO - f

IF

fRF = fLO - f

IF

fRF = fLO + f

IF

fRF = fLO + f

IF

f

RF

VCC = +5.5V

-6

-1

0

-3

-2

-4

-5

1

2

3

4

0 200100 300 400 500

MAX2663

CONVERSION GAIN vs. IF FREQUENCY

MAX2663toc04

IF FREQUENCY (MHz)

CONVERSION GAIN (dB)

900MHz
1900MHz
2450MHz

f

RF

fIF = fLO - f

RF

fIF = fRF - f

LO

fIF = fRF - f

LO

f

IF

fRF = 2450MHz

fRF = 1900MHz

fRF = 900MHz

-18

-14

-16

-10

-12

-6

-8

-4

0

-2

2

250 700 1150 1600 2050 2500

MAX2663

LO PORT RETURN LOSS vs. LO FREQUENCY

MAX2663toc06

LO FREQUENCY (MHz)

RETURN LOSS (dB)

0

200

100

300

600

700

800

500

400

900

-900

-700

-800

-600

-300

-200

-100

-400

-500

0

0 100 200 300 400 500

MAX2663

IF PORT IMPEDANCE vs. IF FREQUENCY

MAX2663toc07

IF FREQUENCY (MHz)

REAL IMPEDANCE (Ω)

IMAGINARY IMPEDANCE (Ω)

IMAGINARY

REAL

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(VCC= SHDN = +3.0V, Typical Operating Circuits, PLO= -5dBm (MAX2660/MAX2661/MAX2663), PLO= -10dBm (MAX2671/MAX2673),
P

IFIN

= -30dBm, TA= +25°C, unless otherwise noted.)

MAX2663

RF PORT IMPEDANCE vs. RF FREQUENCY

900

800

700

600

500

400

300

REAL IMPEDANCE (Ω)

200

100

0

0 500 1000 1500 2000 2500

RF FREQUENCY (MHz)

MAX2663toc08

IMAGINARY

REAL

-100

-200

-300

-400

-500

-600

-700

-800

-900

-1000

MAX2671

SUPPLY CURRENT vs. SUPPLY VOLTAGE

14

13

12

11

10

SUPPLY CURRENT (mA)

9

8

2.5 3.5 4.03.0 4.5 5.0 5.5

TA = +85°C

TA = +25°C

TA = -40°C

SUPPLY VOLTAGE (V)

MAX2671toc01

LO-TO-RF AND RF-TO-LO ISOLATION

MAX2663

vs. LO AND RF FREQUENCY

35

30

25

20

15

ISOLATION (dB)

10

IMAGINARY IMPEDANCE (Ω)

5

0

500 1000 1500 2000 2500

RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm

LO-TO-RF ISOLATION
POWER INTO LO PORT = -5dBm

f

RF

900MHz
1900MHz
2450MHz

f

LO

970MHz
1830MHz
2210MHz

LO AND RF FREQUENCY (MHz)

70MHz
70MHz
240MHz

MAX2671

SHUTDOWN SUPPLY CURRENT

10

9

8

7

6

5

4

3

2

SHUTDOWN SUPPLY CURRENT (µA)

1

0

2.5 3.53.0 4.0 4.5 5.0 5.5

vs. SUPPLY VOLTAGE

SHDN = GND

TA = -40°C

SUPPLY VOLTAGE (V)

f

IF

TA = +85°C

TA = +25°C

CONVERSION GAIN AND OUTPUT

10

fRF = 900MHz

5

0

MAX2663toc09

-5
fRF = 1900MHz

-10

-15

-20
fRF = 1900MHz

-25

-30

-35

-40

-45

-50

OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)

-50 -30-40 -20 -10 0-45 -25-35 -15 -5

CONVERSION GAIN vs. RF FREQUENCY

12

10

MAX2671toc02

8

6

4

2

CONVERSION GAIN (dB)

0

-2

-4
0

MAX2663

POWER vs. IF INPUT POWER

CONVERSION GAIN

fRF = 2450MHz

fRF = 900MHz

f

RF

900MHz
1900MHz
2450MHz

IF INPUT POWER (dBm)

OUTPUT

POWER

fRF = 2450MHz

f

LO

970MHz
1830MHz
2210MHz

MAX2671

VCC = +5.5V

VCC = +2.7V

RF MATCH

400MHz
900MHz
1900MHz
2450MHz

1000500 1500 2000 2500 3000

RF FREQUENCY (MHz)

f

RF

fRF = fLO - f
fRF = fLO - f
fRF = fLO + f
fRF = fLO + f

IF
IF

IF
IF

f

IF

70MHz
70MHz
240MHz

f

IF

45MHz
70MHz
70MHz
240MHz

MAX2663toc10

MAX2671toc03

CONVERSION GAIN vs. IF FREQUENCY

MAX2671

12

10

8

6

4

CONVERSION GAIN (dB)

2

0

fRF = 2450MHz

0 20015050 100 250 300 350 400 450 500

IF FREQUENCY (MHz)

fRF = 900MHz

f

RF

900MHz
1900MHz
2450MHz

fRF = 1900MHz

fIF = fLO - f
fIF = fRF - f
fIF = fRF - f

CONVERSION GAIN vs. LO POWER

12

MAX2671toc04

f

IF

RF
LO
LO

10

8

6

4

2

0

-2

CONVERSION GAIN (dB)

-4

-6

-8

-35 -25

-30 -10 -5 0 5 10

fRF = 2450MHz

f

RF

900MHz
1900MHz
2450MHz

LO INPUT POWER (dBm)

970MHz
1830MHz
2210MHz

-20 -15

fRF = 900MHz

fRF = 1900MHz

f

LO

70MHz
70MHz
240MHz

MAX2671toc05

f

IF

LO PORT RETURN LOSS vs. LO FREQUENCY

2

0

-2

-4

-6

-8

-10

RETURN LOSS (dB)

-12

-14

-16

-18
250 800 1350 1900 2450 3000

MAX2671

MAX2671

MAX2671toc06

LO FREQUENCY (MHz)

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

10 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= SHDN = +3.0V, Typical Operating Circuits, PLO= -5dBm (MAX2660/MAX2661/MAX2663), PLO= -10dBm (MAX2671/MAX2673),
P

IFIN

= -30dBm, TA= +25°C, unless otherwise noted.)

0

200

100

300

600

700

800

500

400

-400

-300

-350

-250

-100

-50

-150

-200

0

0 100 200 300 400 500

MAX2671

IF PORT IMPEDANCE vs. IF FREQUENCY

MAX2671toc07

IF FREQUENCY (MHz)

REAL IMPEDANCE (Ω)

IMAGINARY IMPEDANCE (Ω)

IMAGINARY

REAL

0

200

100

500

400

300

600

700

0 500 1000 1500 2000 2500 3000

MAX2671

RF PORT IMPEDANCE vs. RF FREQUENCY

MAX2671toc08

RF FREQUENCY (MHz)

REAL IMPEDANCE (Ω)

IMAGINARY

REAL

-800

-500

-600

-700

-400

-300

-200

-100

IMAGINARY IMPEDANCE (Ω)

18

20

24

22

26

28

30

32

34

500 1000 1500 2000 2500

MAX2671

LO-TO-RF AND RF-TO-LO ISOLATION

vs. LO or RF FREQUENCY

MAX2671toc09

LO AND RF FREQUENCY (MHz)

ISOLATION (dB)

LO-TO-RF ISOLATION
POWER INTO LO PORT = -10dBm

RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm

-50

-10

-20

-40

-30

0

10

20

-50 -25 -20 -10 -5-30-40-45 -35 -15 0

MAX2671

CONVERSION GAIN AND OUTPUT

POWER vs. IF INPUT POWER

MAX2671toc10

IF INPUT POWER (dBm)

OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)

900MHz
1900MHz
2450MHz

f

RF

970MHz
1830MHz
2210MHz

f

LO

70MHz
70MHz
240MHz

f

IF

fRF = 1900MHz

fRF = 900MHz

fRF = 2450MHz

fRF = 900MHz

fRF = 1900MHz

fRF = 2450MHz

CONVERSION GAIN

OUTPUT POWER

-2

2

0

6

4

8

12

10

14

0

1000500 1500 2000 2500 3000

MAX2673

CONVERSION GAIN vs. RF FREQUENCY

MAX2673toc03

RF FREQUENCY (MHz)

CONVERSION GAIN (dB)

VCC = +5.5V

VCC = +2.7V

VCC = +2.7V

400MHz
900MHz
1900MHz
2450MHz

RF MATCH

45MHz
70MHz
70MHz
240MHz

f

IF

fRF = fLO - f

IF

fRF = fLO - f

IF

fRF = fLO + f

IF

fRF = fLO + f

IF

f

RF

16

17

18

19

20

21

22

23

24

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2673

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX2673toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = +85°C

TA = +25°C

TA = -40°C

0

3

2

1

4

5

6

7

8

9

10

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2673

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX2673toc02

SUPPLY VOLTAGE (V)

SHUTDOWN SUPPLY CURRENT (µA)

TA = +85°C

TA = -40°C

SHDN = GND

TA = +25°C

-2

4

2

0

6

8

10

12

14

0 20015050 100 250 300 350 400 450 500

MAX2673

CONVERSION GAIN vs. IF FREQUENCY

MAX2673toc04

IF FREQUENCY (MHz)

CONVERSION GAIN (dB)

900MHz
1900MHz
2450MHz

f

RF

fIF = fLO - f

RF

fIF = fRF - f

LO

fIF = fRF - f

LO

f

IF

fRF = 900MHz

fRF = 1900MHz

fRF = 2450MHz

0

2

4

10

6

8

12

14

-25 -15-20 -10 -5 0 5 10

MAX2673

CONVERSION GAIN vs. LO POWER

MAX2673toc05

LO POWER (dBm)

CONVERSION GAIN (dB)

fRF = 2450MHz

fRF = 900MHz

fRF = 1900MHz

900MHz
1900MHz
2450MHz

970MHz
1830MHz
2210MHz

70MHz
70MHz
240MHz

f

RF

f

LO

f

IF

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

______________________________________________________________________________________ 11

Typical Operating Characteristics (continued)

(VCC= SHDN = +3.0V, Typical Operating Circuits, PLO= -5dBm (MAX2660/MAX2661/MAX2663), PLO= -10dBm (MAX2671/MAX2673),
P

IFIN

= -30dBm, TA= +25°C, unless otherwise noted.)

LO PORT RETURN LOSS vs. LO FREQUENCY

0

-2

-4

-6

-8

-10

-12

RETURN LOSS (dB)

-14

-16

-18

-20
250 800 1350 1900 2450 3000

LO FREQUENCY (MHz)

MAX2673

RF PORT IMPEDANCE vs. RF FREQUENCY

350

MAX2673

300

250

200

150

REAL IMPEDANCE (Ω)

100

50

0

0 500 1000 1500 2000 2500 3000

RF FREQUENCY (MHz)

IMAGINARY

REAL

20

10

0

-10

-20

-30

-40

-50

OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)

IF PORT IMPEDANCE vs. IF FREQUENCY

700

MAX2673toc06

600

500

400

300

REAL IMPEDANCE (Ω)

200

100

0

0 100 150 200 25050 300 350 400 450 500

LO-to-RF ISOLATION AND RF-to-LO ISOLATION

MAX2673toc08

0

-100

-200

-300

-400

-500

-600

-700

IMAGINARY IMPEDANCE (Ω)

45

40

35

30

25

20

ISOLATION (dB)

15

10

5

0

500 900 1300 1700 2100 2500

MAX2673

CONVERSION GAIN AND OUTPUT

POWER vs. IF INPUT POWER

fRF = 900MHz

fRF = 1900MHz

fRF = 900MHz

fRF = 1900MHz

-40 -35 -25-30 -15 -10 -5-40-45 -20 0
IF INPUT POWER (dBm)

CONVERSION GAIN

fRF = 2450MHz

fRF = 2450MHz

f

RF

970MHz

900MHz

1830MHz

1900MHz

2210MHz

2450MHz

OUTPUT POWER

f

LO

70MHz
70MHz
240MHz

MAX2673

REAL

IMAGINARY

IF FREQUENCY (MHz)

MAX2673

vs. LO OR RF FREQUENCY

LO-

TO-RF ISOLATION

POWER INTO LO PORT = -10dBm

RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm

LO OR RF FREQUENCY (MHz)

MAX2673toc10

f

IF

MAX2673toc07

50

0

-50

-100

-150

-200

-250

-300

MAX2673toc09

IMAGINARY IMPEDANCE (Ω)

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

12 ______________________________________________________________________________________

Pin Description

FUNCTION

MAX2660
MAX2661
MAX2663
MAX2671

1

Local-Oscillator Input. Apply a local-oscillator signal with an amplitude of -10dBm to
+5dBm for the MAX2671/MAX2673 or -5dBm to +2dBm for the MAX2660/ MAX2661/
MAX2663. AC-couple to the oscillator with a DC blocking capacitor. Nominal DC volt­age is V

CC

- 0.4V to VCC- 1.0V.

MAX2673

2 Mixer Ground. Connect to the ground plane with a low-inductance connection.

3

Intermediate Frequency Input. AC-couple to the input signal with a DC blocking
capacitor. Nominal DC voltage is 1.37V.

PIN

1

2, 6

6

Active-Low Shutdown Pin. Drive low to deactivate all part functions and reduce the
supply current to less than 1µA. For normal operation, drive high or connect to V

CC

.

5

Voltage Supply Rail, +2.7V to +5.5V. Bypass with a capacitor to the ground plane.
Capacitor value depends on desired operating frequency.

4

Radio Frequency Output. Open-collector output requires an inductor to VCCthat is
part of an impedance-matching network. AC-couple to this pin using a blocking
capacitor that can be part of the impedance-matching network. See Applications
Information for details on impedance matching.

7, 8

3

4

5

NAME

LO

GND

IFIN

SHDN

V

CC

RFOUT

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

______________________________________________________________________________________ 13

_______________Detailed Description

The MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
are 2.5GHz double-balanced upconverter mixers
designed to provide optimum linearity performance for
a specified supply current. These upconverter mixers
use single-ended RF, LO, and IF port connections,
except for the MAX2673, which uses a differential IF
port. An on-chip bias cell provides a low-power shut­down feature. See the Selector Guide for device fea­tures and comparison.

__________Applications Information

Local-Oscillator (LO) Input

The LO input is a single-ended broadband port with a
return loss of better than 8dB from 600MHz to 2.5GHz.
The LO signal is mixed with the input IF signal, and the
resulting upconverted output appears on the RFOUT
pin. AC-couple the LO pin with a capacitor having less
than 3Ω reactance at the LO frequency. The
MAX2671/MAX2673 include an internal LO buffer and
require an LO signal ranging from -10dBm to +5dBm,
while the MAX2660/MAX2661/MAX2663 require an LO
signal ranging from -5dBm to +2dBm.

IF Input

The MAX2660/MAX2661/MAX2663/MAX2671 have a
single-ended IF input port, while the MAX2673 has a
differential IF input port for high-performance interface­to-differential IF filters. AC-couple the IF pin(s) with a
capacitor. The typical IF input frequency range is
40MHz to 500MHz. For further information, see the IF
Port Impedance vs. IF Frequency graph in the Typical

Operating Characteristics.

RF Output

The RF output frequency range extends from 400MHz
to 2.5GHz. RFOUT is a high-impedance, open-collector
output that requires an external inductor to VCCfor
proper biasing. For optimum performance, implement
an impedance-matching network. The configuration
and values for the matching network depend on the fre­quency, performance, and desired output impedance.
For assistance in choosing components for optimal per­formance, see Table 1 as well as the RF Output
Impedance vs. RF Frequency graph in the Typical
Operating Characteristics.

Power Supply and

SSHHDDNN

Bypassing

Proper attention to supply bypassing is essential for a
high-frequency RF circuit. Bypass VCCwith a 10µF
capacitor in parallel with an RF capacitor (Table 2). Use
separate vias to the ground plane for each of the
bypass capacitors and minimize trace length to reduce
inductance. Use separate vias to the ground plane for
each ground pin. Use low-inductance ground connec­tions.

Decouple SHDN with a 100pF capacitor to ground to
minimize noise on the internal bias cell. Use a series
resistor (typically 100Ω) to reduce coupling of high-fre­quency signals into the SHDN pin.

______________________Layout Issues

A well-designed PC board is an essential part of an RF
circuit. For best performance, pay attention to power­supply issues as well as to the layout of the RFOUT
matching network.

Power-Supply Layout

To minimize coupling between different sections of the
IC, the ideal power-supply layout is a star configuration
with a large decoupling capacitor at a central V

CC

node. The VCCtraces branch out from this central
node, each going to a separate VCCnode in the PC
board. At the end of each trace is a bypass capacitor
that has low ESR at the RF frequency of operation. This
arrangement provides local decoupling at each V

CC

pin. At high frequencies, any signal leaking out of one
supply pin sees a relatively high impedance (formed by
the VCCtrace inductance) to the central VCCnode, and
an even higher impedance to any other supply pin, as
well as a low impedance to ground through the bypass
capacitor.

Impedance-Matching Network Layout

The RFOUT matching network is very sensitive to lay­out-related parasitics. To minimize parasitic induc­tance, keep all traces short and place components as
close as possible to the chip. To minimize parasitic
capacitance, use cutouts in the ground plane (and any
other plane) below the matching network components.

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

14 ______________________________________________________________________________________

Functional Diagram

Table 2. Typical Operating Circuit (External Component Values)

COMPONENT VALUE AT A GIVEN FREQUENCY (MHz)

100 100470 100

5.6 3.9Short 27

47

1.5

10

47

1

4.7156.8

470

AT

1900AT2450

6.8

3.3

47

1.5

39

220

18

AT

400

AT

900

100 47470 47

8.2 3.3Short 33

1.8

100

47

Open

220

1.8471.8

6.8

AT

1900AT2450

3.3

470

1.8

220

394718

AT

400

AT

900

100 47470 47

8.2 3.3Short 33

1.5

100

47

Open

220

2.7471.8

6.8

AT

1900AT2450

3.3

470

1

220

394718

AT

400

AT

900

47 15470C6 (pF) 47

8.2 3.3ShortL1 (nH) 33

1.5

220

47

Open

15

2.7472.2

6.8C5 (pF)

AT

1900

AT

2450

3.3C4 (pF)

470C3 (pF)

1

220

39L2 (nH)

47

18

AT

400AT900

PART

92–j375

130–j453

MAX2661 357–j649

82–j360

70–j290

MAX2663 485–j718

MAX2671 333–j613

MAX2673 220–j530

38–j99

45–j123

54–j152

31–j95

32–j70

65–j188

46–j150

35–j110

Table 1. RF Output Impedance

COMPONENT

MAX2673MAX2663MAX2661/MAX2671MAX2660

RF OUTPUT IMPEDANCE (Ω)

AT 400MHz AT 900MHz AT 1900MHz AT 2450MHz

MAX2660 126–j459480–j732 46–j12465–j190

MAX2660

MAX2660
MAX2661
MAX2663

LO

MAX2671

LO

MAX2673

IFIN+

IFIN-

MAX2673
ONLY

MAX2661
MAX2663
MAX2671
MAX2673

BIAS

V

CC

SHDN

GND

RFOUT

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

______________________________________________________________________________________ 15

Typical Operating Circuits

LO INPUT

IF INPUT

LO INPUT

SHUTDOWN

CONTROL

V

CC

+3.0V

R2

100Ω

100pF

C1

220pF

C2

220pF

C1

220pF

C8

C9

10µF

1

LO

2

3

*THE VALUES OF L1, L2, C3, C4, C5, AND C6
DEPEND ON THE RF FREQUENCY AND PART NUMBER.
SEE TABLE 2.

1

2

3

4

C5**

MAX2660

GND

MAX2661
MAX2663

IFIN

MAX2671

LO

MAX2673

GND

SHDN

V

CC

**THE VALUES OF L1, L2, C3, C4, C5, AND C6
DEPEND ON THE RF FREQUENCY.
SEE TABLE 2.

SHDN

V

RFOUT

IFIN+

IFIN-

GND

RFOUT

CC

C8

6

100pF

5

4

L1*

8

C10

7

6

5

22pF

L1**

C3*

L2*

C6*

L2**

C6**

R1

100Ω

C9

10µF

C2

220pF

C7

220pF

C3**

C4**

C4*

SHUTDOWN
CONTROL

C5*

IF INPUT

RF OUTPUT

RF OUTPUT

V

CC

+3.0V

MAX2660/MAX2661/MAX2663/MAX2671/MAX2673

400MHz to 2.5GHz Upconverter Mixers

16 ______________________________________________________________________________________

________________________________________________________Package Information

6LSOT.EPS

8LUMAXD.EPS