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MAX2682

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

Maxim Integrated 

MAX2680/MAX2681/

MAX2682

EVALUATION KIT AVAILABLE

400MHz to 2.5GHz, Low-Noise,

SiGe Downconverter Mixers

General Description

The MAX2680/MAX2681/MAX2682 miniature, low-cost,

low-noise downconverter mixers are designed for low-

voltage operation and are ideal for use in portable com-

munications 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 perfor-

mance. 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

Ordering Information

PART

MAX2680EUT-T

MAX2681EUT-T

MAX2682EUT-T

TEMP RANGE

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

PIN-

PACKAGE

6 SOT23

6 SOT23

6 SOT23

SOT

TOP MARK

AAAR

AAAS

AAAT

Selector Guide

PART

ICC

(mA)

MAX2680

5.0

MAX2681

8.7

MAX2682

15.0

IIP3

(dBm)

-12.9

-6.1

-1.8

900MHz

NF

(dB)

6.3

7.0

6.5

GAIN

(dB)

11.6

14.2

14.7

FREQUENCY

1950MHz

IIP3

(dBm)

NF

(dB)

GAIN

(dB)

-8.2

8.3

7.6

+0.5

11.1

8.4

+4.4

10.2

10.4

IIP3

(dBm)

-6.9

+1.0

+3.2

2450MHz

NF

(dB)

11.7

12.7

13.4

GAIN

(dB)

7.0

7.7

7.9

Typical Operating Circuit appears at end of data sheet.

19-4786; Rev 2; 8/03

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