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MAX1479

300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter

300MHz to 450MHz Low-Power, Crystal-Based ASK/FSK Transmitter has More than +10dBm Output

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX1479 crystal-referenced phase-locked-loop (PLL) VHF/UHF transmitter is designed to transmit ASK, OOK, and FSK data in the 300MHz to 450MHz frequency range. The MAX1479 supports data rates up to 100kbps in ASK mode and 20kbps in FSK mode (both Manchester coded). The device provides an adjustable output power of more than +10dBm into a 50Ω load. The crystal-based architecture of the MAX1479 eliminates many of the common problems of SAW-based transmitters by providing greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced temperature dependence. These improvements enable better overall receiver performance when using the MAX1479 together with a superheterodyne receiver such as the MAX1470, MAX1471, MAX1473, or MAX7033.

The MAX1479 is available in a 16-pin TQFN package (3mm x 3mm) and is specified for the automotive temperature range from -40°C to +125°C.

Data Sheet

Download	Rev 1	(PDF, 272kB)
E-Mail

An evaluation kit is available: MAX1479EVKIT

Key Features

ETSI-Compliant EN300 220
+2.1V to +3.6V Single-Supply Operation
Supports ASK, OOK, and FSK Modulations
Adjustable FSK Shift
+10dBm Output Power into 50Ω Load
Low Supply Current (6.7mA in ASK Mode, and 10.5mA in FSK Mode)
Uses Small Low-Cost Crystal
Small 16-Pin TQFN Package
Fast-On Oscillator—200µs Startup Time
Programmable Clock Output

Applications/Uses

Garage Door Openers
Radio-Controlled Toys
Remote Keyless Entry (RKE)
RF Remote Controls
Security Systems
Tire-Pressure Monitoring (TPM)
Wireless Computer Peripherals
Wireless Game Consoles
Wireless Sensors

Key Specifications:

ISM RF Transmitters

Part Number

Solutions

Applications

Band/ Freq.
(MHz)

Features

Footprint
(mm x mm)

Smallest Available Pckg.
(mm²)

Package/Pins

Industry Qualified

Budgetary Price

max w/pins

See Notes

MAX1479

300 to 450MHz-ISM RKE

Automotive

Garage Door Openers

Home Automation

ISM

ISM (Europe)

RF Remote Controls

RKE

Security Systems

TPM

300 to 450

2.1V to 3.6V Single-Supply Operation

200 us Start-Up Time

Adjustable FSK Shift

ETSI-Compliant EN300 220

Low Supply Current (6.7mA in ASK Mode, and 10.5mA in FSK Mode)

Output Power Adjustable to >+10dBm

Small 16-pin Thin QFN Package

Supports ASK, OOK

3.0 x 3.0

9.6

TQFN/16

Automotive - AECQ100

Automotive - General

$1.14 @1k

See All ISM RF Transmitters (13)

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

Typical Application Circuit

Application Notes

Tutorial 1955		Fast Start-Up Oscillator (FOX) Boosts Superhet Performance
Application Note 3395		Requirements of Remote Keyless Entry (RKE) Systems
Application Note 3401		Matching Maxim's 300MHz to 450MHz Transmitters to Small Loop Antennas
Application Note 3435		Manchester Data Encoding for Radio Communications
Application Note 3587		FCC and ETSI Requirements for Short-Range UHF ASK-Modulated Transmitters
Application Note 3589		Power Amplifier Theory for High-Efficiency Low-Cost ISM-Band Transmitters
Application Note 3815		Radiated Power and Field Strength from UHF ISM Transmitters
Application Note 3945		Path Loss in Remote Keyless Entry Systems
Tutorial 4636		Avoid PC-Layout "Gotchas" in ISM-RF Products
Tutorial 4691		Introduction to Hearing Aids and Important Design Considerations
Tutorial 5100		General Layout Guidelines for RF and Mixed-Signal PCBs
Application Note 5142		Radio Link-Budget Calculations for ISM-RF Products

Product Guides

Wireless (PDF)

Reliability Reports

Reliability Report:	AEC-MAX1479ATE_B.pdf MAX1479ATE.pdf
Show FIT data for:

Software/Models

none

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
MAX1479ATE			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0030 (PDF) Use pkgcode/variation: T1633-2*	-40°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX1479ATE+			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0030 (PDF) Use pkgcode/variation: T1633+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1479ATE+T			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0030 (PDF) Use pkgcode/variation: T1633+2*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1479ATE-T			Active	QFN;16 pin Land Pattern: Not Available	-40°C to +125°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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Evaluation Kits

MAX1479EVKIT

Evaluation Kit for the MAX1479

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