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MAX9981

825MHz to 915MHz, Dual SiGe High-Linearity Active Mixer

Industry's First Dual SiGe Mixer Reduces Cost, Space, and Component Count for 2.5G and 3G BTS Designs

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX9981 dual high-linearity mixer integrates a local oscillator (LO) switch, LO buffer, LO splitter, and two active mixers. On-chip baluns allow for single-ended RF and LO inputs. The active mixers eliminate the need for an additional IF amplifier because the mixer provides a typical overall conversion gain of 2.1dB.

The MAX9981 active mixers are optimized to meet the demanding requirements of GSM850, GSM900, and CDMA850 base-station receivers. These mixers provide exceptional linearity with an input IP3 of greater than +27dBm. The integrated LO driver allows for a wide range of LO drive levels from -5dBm to +5dBm. In addition, the built-in high-isolation switch enables rapid LO selection of less than 250ns, as needed for GSM transceiver designs.

The MAX9981 is available in a 36-pin QFN package (6mm x 6mm) with an exposed paddle, and is specified over the -40°C to +85°C extended temperature range.

Data Sheet

Download	Rev 0	(PDF, 424kB)
E-Mail

An evaluation kit is available: MAX9981EVKIT

Key Features

+27.3dBm Input IP3
+13.6dBm Input 1dB Compression Point
825MHz to 915MHz RF Frequency Range
70MHz to 170MHz IF Frequency Range
725MHz to 1085MHz LO Frequency Range
2.1dB Conversion Gain
10.8dB Noise Figure
42dB Channel-to-Channel Isolation
-5dBm to +5dBm LO Drive
+5V Single-Supply Operation
Built-In LO Switch with 52dB LO1 to LO2 Isolation
ESD Protection
Integrated RF and LO Baluns for Single-Ended Inputs

Applications/Uses

Cellular cdmaOne™ and cdma2000® Base Station Receivers
Digital and Spread-Spectrum Communication Systems
GSM 850/GSM 900 2G and 2.5G EDGE Base Station Receivers
Microwave Point-to-Point Links
TDMA and Integrated Digital Enhanced Network (iDEN®) Base-Station Receivers

Key Specifications:

Downconverter Mixers

Part Number

Channels

RF Freq.
(MHz)

LO Freq.
(MHz)

IF Freq.
(MHz)

Gain
(dB)

Input IP3
(dBm)

Noise Figure
(dB)

2RF-2LO/ 2LO-2RF
(dBc)

V_CC
(V)

5V Supply Current
(mA)

Footprint
(mm x mm)

Package/Pins

Budgetary Price

min

max

min

max

min

max

See Notes

MAX9981

825

915

725

1085

170

2.1

27.3

10.8

48.2

4.75 to 5.25

291

6.0 x 6.0

TQFN/36

$12.25 @1k

See All Downconverter Mixers (44)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Pin Configuration

Application Notes

Application Note 2371		Consider Overall Cascaded Performance When Comparing Integrated RF Frequency Mixers to Passive Mixer Solutions
Tutorial 5100		General Layout Guidelines for RF and Mixed-Signal PCBs

Product Guides

Wireless (PDF)

Reliability Reports

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Software/Models

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Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9981ETX			Active	TQFN;36 pin;37.2 mm² Outline Drawing:21-0141 (PDF) Land Pattern: 90-0049 (PDF) Use pkgcode/variation: T3666-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX9981ETX+			Active	TQFN;36 pin;37.2 mm² Outline Drawing:21-0141 (PDF) Land Pattern: 90-0049 (PDF) Use pkgcode/variation: T3666+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9981ETX+D			Active	QFN;36 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9981ETX+T			Active	QFN;36 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9981ETX+TD			Active	QFN;36 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX9981ETX-T			Active	QFN;36 pin Land Pattern: Not Available	-40°C to +85°C	See data sheet

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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MAX9982	825MHz to 915MHz, SiGe High-Linearity Active Mixer
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Evaluation Kits

MAX9981EVKIT

Evaluation Kit for the MAX9981

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