MAX1472AKAT(2009) Просмотр технического описания (PDF) - Maxim Integrated

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MAX1472AKAT
(Rev.:2009)

300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter

Maxim Integrated 

19-2872; Rev 2; 6/09

EVAALVUAAILTAIOBNLEKIT

300MHz-to-450MHz Low-Power,

Crystal-Based ASK Transmitter

General Description

The MAX1472 is a crystal-referenced phase-locked

loop (PLL) VHF/UHF transmitter designed to transmit

OOK/ASK data in the 300MHz to 450MHz frequency

range. The MAX1472 supports data rates up to

100kbps, and adjustable output power to more than

+10dBm into a 50Ω load. The crystal-based architec-

ture of the MAX1472 eliminates many of the common

problems with SAW transmitters by providing greater

modulation depth, faster frequency settling, higher

tolerance of the transmit frequency, and reduced

temperature dependence. Combined, these improve-

ments enable better overall receiver performance when

using a superheterodyne receiver such as the MAX1470

or MAX1473.

The MAX1472 is available in a 3mm x 3mm 8-pin

SOT23 package and is specified for the automotive

(-40°C to +125°C) temperature range. An evaluation kit

is available. Contact Maxim Integrated Products for

more information.

Applications

Remote Keyless Entry

RF Remote Controls

Tire Pressure Monitoring

Security Systems

Radio-Controlled Toys

Wireless Game Consoles

Wireless Computer Peripherals

Wireless Sensors

Features

♦ 2.1V to 3.6V Single-Supply Operation

♦ Low 5.3mA Operating Supply Current*

♦ Supports ASK with 90dB Modulation Depth

♦ Output Power Adjustable to More than +10dBm

♦ Uses Small Low-Cost Crystal

♦ Small 3mm ✕ 3mm 8-Pin SOT23 Package

♦ Fast-On Oscillator 220µs Startup Time

*At 50% duty cycle (315MHz, 2.7V supply, +10dBm output

power)

Ordering Information

PART

TEMP

RANGE

PIN-

TOP

PACKAGE MARK

MAX1472AKA+T -40°C to +125°C 8 SOT23

AEKS

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Typical Application Circuit

Pin Configuration

*

50Ω

ANTENNA

220pF 680pF

+

1 XTAL1

XTAL2 8

2 GND MAX1472 VDD 7

3.0V

3 PAGND

4 PAOUT

DATA 6

DATA INPUT

ENABLE 5

STANDBY OR

POWER-UP

*Optional power adjust resistor.

TOP VIEW

+

XTAL1 1

GND 2

PAGND 3

MAX1472

PAOUT 4

8 XTAL2

7 VDD

6 DATA

5 ENABLE

SOT23

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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