Datasheet > MAX7058

MAX7058

更新时间： 2024-09-26 11:14:59

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描述
315MHz/390MHz Dual-Frequency ASK Transmitter

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数据手册

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MAX7058 数据手册

19-3206; Rev 0; 1/08

315MHz/390MHz Dual-Frequency

ASK Transmitter

MAX7058

General Description

Features

The MAX7058 UHF transmitter alternately transmits

ASK/OOK data at 315MHz or 390MHz using a single

crystal. The MAX7058 has internal tuning capacitors at

the output of the power amplifier that can be pro-

grammed for matching to the antenna or load. The

MAX7058 can transmit at a data rate up to 100kbps

NRZ (50kbps Manchester coded). Typical transmitted

power into a 50Ω load is +10dBm. The MAX7058 oper-

ates from +2.1V to +3.6V and draws under 8.0mA of

current. The standby current is less than 1μA at room

temperature. A 15MHz crystal is used as the reference

for 315MHz and 390MHz operation by selecting synthe-

sizer-divide ratios of 21 and 26, respectively.

♦ Switched 315MHz/390MHz Carrier Frequency

Using One Crystal

♦ +2.1V to +3.6V Single-Supply Operation

♦ ASK/OOK Modulation

♦ Internal Switched Capacitors for Optimum Dual-

Frequency Operation

♦ 8.0mA DC Current Drain (50% Duty Cycle OOK)

♦ 0.8µA Standby Current

♦ Small 4mm x 4mm, 24-Pin Thin QFN Package

The MAX7058 is available in a 4mm x 4mm, 24-pin thin

QFN package and is specified to operate in the -40°C

to +125°C automotive temperature range.

Applications

Ordering Information

Garage Door Openers

PKG

CODE

PART

TEMP RANGE PIN-PACKAGE

RF Remote Controls

Home Automation

Wireless Sensors

Security Systems

Automotive

24 Thin QFN-EP*

(4mm x 4mm)

MAX7058ATG+ -40°C to +125°C

T2444+3

+Denotes a lead-free package.

*EP = Exposed paddle.

Pin Configuration

Functional Block Diagram

TOP VIEW

N.C.

DVDD

FSEL

N.C.

24 23 22 21 20 19

CRYSTAL

OSCILLATOR

N.C.

XTAL1

DVDD

FSEL

CAP1

17 XTAL1

FREQUENCY

÷21 OR ÷26

CHARGE

PUMP

PFD

VCO

XTAL2

AVDD

16 XTAL2

15 AVDD

14 PAVDD

13 N.C.

EXPOSED

DIGITAL PADDLE

CONTROL (GND)

MAX7058

LOOP

FILTER

CAP2

N.C.

14 PAVDD

CAP1

CAP2

EP*

ENVELOPE

SHAPING

N.C.

10 11 12

MAX7058

N.C.

TQFN

*EP = EXPOSED PADDLE.

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...14

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