MAXIM MAX2680, MAX2681, MAX2682 Technical data

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General Description

The MAX2680/MAX2681/MAX2682 miniature, low-cost,
low-noise downconverter mixers are designed for low­voltage operation and are ideal for use in portable com­munications equipment. Signals at the RF input port are
mixed with signals at the local oscillator (LO) port using a
double-balanced mixer. These downconverter mixers
operate with RF input frequencies between 400MHz and
2500MHz, and downconvert to IF output frequencies
between 10MHz and 500MHz.

The MAX2680/MAX2681/MAX2682 operate from a sin­gle +2.7V to +5.5V supply, allowing them to be pow­ered directly from a 3-cell NiCd or a 1-cell Lithium
battery. These devices offer a wide range of supply
currents and input intercept (IIP3) levels to optimize
system performance. Additionally, each device features
a low-power shutdown mode in which it typically draws
less than 0.1µA of supply current. Consult the Selector
Guide for various combinations of IIP3 and supply cur­rent.

The MAX2680/MAX2681/MAX2682 are manufactured
on a high-frequency, low-noise, advanced silicon-ger­manium process and are offered in the space-saving
6-pin SOT23 package.

Applications

400MHz/900MHz/2.4GHz ISM-Band Radios

Personal Communications Systems (PCS)

Cellular and Cordless Phones

Wireless Local Loop

IEEE-802.11 and Wireless Data

Features

♦ 400MHz to 2.5GHz Operation

♦ +2.7V to +5.5V Single-Supply Operation

♦ Low Noise Figure: 6.3dB at 900MHz (MAX2680)

♦ High Input Third-Order Intercept Point

(IIP3 at 2450MHz)

-6.9dBm at 5.0mA (MAX2680)
+1.0dBm at 8.7mA (MAX2681)
+3.2dBm at 15.0mA (MAX2682)

♦ <0.1µA Low-Power Shutdown Mode

♦ Ultra-Small Surface-Mount Packaging

MAX2680/MAX2681/MAX2682

400MHz to 2.5GHz, Low-Noise,

SiGe Downconverter Mixers

________________________________________________________________ Maxim Integrated Products 1

19-4786; Rev 2; 8/03

PART

MAX2680EUT-T

MAX2681EUT-T

MAX2682EUT-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

AVAILABLE

Pin Configuration

Ordering Information

SOT

TOP MARK

AAAR

AAAS

AAAT

8.7MAX2681

5.0MAX2680

Selector Guide

PART

I

CC

(mA)

-6.1

IIP3

(dBm)

-12.9

7.0

NF

(dB)

6.3

14.2

GAIN

(dB)

11.6

900MHz

+0.5

IIP3

(dBm)

-8.2

11.1

NF

(dB)

8.3

8.4

GAIN

(dB)

7.6

1950MHz

+1.0

IIP3

(dBm)

-6.9

12.7

NF

(dB)

11.7

7.7

GAIN

(dB)

7.0

2450MHz

-1.815.0MAX2682 6.5 14.7 +4.4 10.2 10.4 +3.2 13.4 7.9

Typical Operating Circuit appears at end of data sheet.

FREQUENCY

TOP VIEW

16SHDN

LO

GND

MAX2680

2

MAX2681
MAX2682

34

SOT23-6

5 V

IFOUTRFIN

CC

MAX2680/MAX2681/MAX2682

400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, SHDN = +2V, TA= T

MIN

to T

MAX

unless otherwise noted. Typical values are at VCC= +3V and TA= +25°C.

Minimum and maximum values are guaranteed over temperature 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

RFIN Input Power (50Ω Source).....................................+10dBm

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

SHDN, IFOUT, RFIN to GND ......................-0.3V to (V

CC

+ 0.3V)

LO to GND..........................................(V

CC

- 1V) to (VCC+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

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, 10s) .................................+300°C

MAX2682

MAX2681

MAX2680

SHDN = 0.5V

0 < SHDN < V

CC

CONDITIONS

mA

15.0 21.8

I

CC

Operating Supply Current

8.7 12.7

5.0 7.7

µA0.05 5I

CC

Shutdown Supply Current

V2.0V

IH

Shutdown Input Voltage High

V0.5V

IL

Shutdown Input Voltage Low

µA0.2I

SHDN

Shutdown Input Bias Current

UNITSMIN TYP MAXSYMBOLPARAMETER

(Notes 1, 2)

(Notes 1, 2)

50Ω source impedance

fRF= 1950MHz, 1951MHz, fLO= 1880MHz, fIF= 70MHz

fRF= 900MHz, 901MHz, fLO= 970MHz, fIF= 70MHz

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

fRF= 1950MHz, fLO= 2020MHz, fIF= 70MHz

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

(Notes 1, 2)

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

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

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

fRF= 1950MHz, fLO= 1880MHz, fIF= 70MHz (Note 1)

fRF= 2450MHz, 2451MHz, fLO= 2210MHz, fIF= 240MHz

CONDITIONS

1.5:1LO Input VSWR

dB

11.7

Noise Figure (Single Sideband)

8.3

6.3

dBm

-6.9

Input Third-Order Intercept Point
(Note 3)

MHz400 2500LO Frequency Range

MHz400 2500RF Frequency Range

-8.2

-12.9

dB

7.0

Conversion Power Gain

MHz10 500IF Frequency Range

7.3

11.6

5.7 7.6 8.6

UNITSMIN TYP MAXPARAMETER

AC ELECTRICAL CHARACTERISTICS

(MAX2680/1/2 EV Kit, VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. PLO= -5dBm,
P

RFIN

= -25dBm.)

fRF= 1950MHz, fLO= 1880MHz, fIF= 70MHz,
TA= T

MIN

to T

MAX

(Note 1)

dB1.9 2.4Gain Variation Over Temperature

fLO= 1880MHz dBm-22LO Leakage at IFOUT Port

MAX2680

CAUTION! ESD SENSITIVE DEVICE

MAX2680/MAX2681/MAX2682

400MHz to 2.5GHz, Low-Noise,

SiGe Downconverter Mixers

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2680/1/2 EV Kit, VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. PLO= -5dBm,
P

RFIN

= -25dBm.)

fRF= 1950MHz, fLO= 1880MHz, fIF= 70MHz,
TA= T

MIN

to T

MAX

(Note 1)

dB1.7 2.3

(Notes 1, 2)

Gain Variation Over Temperature

fLO= 1880MHz

(Notes 1, 2)

fLO= 1880MHz

dBm

50Ω source impedance

fRF= 1950MHz, 1951MHz, fLO= 1880MHz, fIF= 70MHz

fRF= 900MHz, 901MHz, fLO= 970MHz, fIF= 70MHz

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

fRF= 1950MHz, fLO= 2020MHz, fIF= 70MHz

-27

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

(Notes 1, 2)

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

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

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

fRF= 1950MHz, fLO= 1880MHz, fIF= 70MHz (Note 1)

fRF= 2450MHz, 2451MHz, fLO= 2210MHz, fIF= 240MHz

CONDITIONS

LO Leakage at RFIN Port

dBm-23LO Leakage at IFOUT Port

fRF= 1915MHz, fLO= 1880MHz, fIF= 70MHz (Note 4) dBm-65IF/2 Spurious Response

1.5:1LO Input VSWR

dB

12.7

Noise Figure (Single Sideband)

11.1

7.0

dBm

+1.0

Input Third-Order Intercept Point
(Note 3)

MHz400 2500LO Frequency Range

MHz400 2500RF Frequency Range

+0.5

-6.1

dB

7.7

Conversion Power Gain

MHz10 500IF Frequency Range

11.0

14.2

6.7 8.4 9.4

UNITSMIN TYP MAXPARAMETER

fRF= 1950MHz, fLO= 1880MHz, fIF= 70MHz,
TA= T

MIN

to T

MAX

(Note 1)

dB2.1 3.2

(Notes 1, 2)

Gain Variation Over Temperature

(Notes 1, 2)

fRF= 1950MHz, 1951MHz, fLO= 1880MHz, fIF= 70MHz

fRF= 900MHz, 901MHz, fLO= 970MHz, fIF= 70MHz

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

(Notes 1, 2)

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

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

fRF= 1950MHz, fLO= 1880MHz, fIF= 70MHz (Note 1)

fRF= 2450MHz, 2451MHz, fLO= 2210MHz, fIF= 240MHz

dBm

+3.2

Input Third-Order Intercept Point
(Note 3)

MHz400 2500LO Frequency Range

MHz400 2500RF Frequency Range

+4.4

-1.8

dB

7.9

Conversion Power Gain

MHz10 500IF Frequency Range

13.4

14.7

8.7 10.4 11.7

fRF= 1950MHz, fLO= 2020MHz, fIF= 70MHz

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

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

dB

13.4

Noise Figure (Single Sideband)

10.2

6.5

fLO= 1880MHz dBm-26LO Leakage at RFIN Port

fRF= 1915MHz, fLO= 1880MHz, fIF= 70MHz (Note 4) dBm-51IF/2 Spurious Response

MAX2681

MAX2682

2

3

5

4

6

7

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2680

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX2680/1/2-01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = +85°C

TA = +25°C

TA = -40°C

SHDN = V

CC

5

6

8

7

9

10

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2681

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX2680/1/2-02

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = +85°C

SHDN = V

CC

TA = +25°C

TA = -40°C

8

11

10

9

12

13

14

15

16

17

18

2.5 3.53.0 4.0 4.5 5.0 5.5

MAX2682

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX2680/1/2-03

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

TA = +85°C

TA = +25°C

TA = -40°C

SHDN = V

CC

MAX2680/MAX2681/MAX2682

400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2680/1/2 EV Kit, VCC= SHDN = +3.0V, TA= +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. PLO= -5dBm,
P

RFIN

= -25dBm.)

fLO= 1880MHz

fLO= 1880MHz

dBm

50Ω source impedance

-27

CONDITIONS

LO Leakage at RFIN Port

dBm-23LO Leakage at IFOUT Port

fRF= 1915MHz, fLO= 1880MHz, fIF= 70MHz (Note 4) dBm-61IF/2 Spurious Response

1.5:1LO Input VSWR

UNITSMIN TYP MAXPARAMETER

Note 1: Guaranteed by design and characterization.
Note 2: Operation outside of this specification is possible, but performance is not characterized and is not guaranteed.
Note 3: Two input tones at -25dBm per tone.
Note 4: This spurious response is caused by a higher-order mixing product (2x2). Specified RF frequency is applied and IF output

power is observed at the desired IF frequency (70MHz).

Typical Operating Characteristics

(Typical Operating Circuit, VCC= SHDN = +3.0V, P

RFIN

= -25dBm, PLO= -5dBm, TA= +25°C, unless otherwise noted.)