Rainbow-electronics MAX7042 Uživatelský manuál stáhnout pdf

General Description

The MAX7042 fully integrated, low-power, CMOS

superheterodyne RF receiver is designed to receive

frequency-shift-keyed (FSK) data at rates up to 66kbps

nonreturn-to-zero (NRZ) (33kbps Manchester). The

MAX7042 requires only a few external components to

realize a complete wireless RF receiver at 308, 315,

418, and 433.92MHz.

The MAX7042 includes all the active components

required in a superheterodyne receiver including a low-

noise amplifier (LNA), an image-rejection (IR) mixer, a

fully integrated phase-locked loop (PLL), local oscillator

(LO), 10.7MHz IF limiting amplifier with received-signal-

strength indicator (RSSI), low-noise FM demodulator,

and a 3V regulator. Differential peak-detecting data

demodulators are included for baseband data recovery.

The MAX7042 is available in a 32-pin thin QFN and

is specified over the automotive -40°C to +125°C

temperature range.

Applications

Remote Keyless Entry

Tire-Pressure Monitoring

Home and Office Lighting Control

Remote Sensing

Smoke Alarms

Home Automation

Local Telemetry Systems

Security Systems

Features

♦ +2.4V to +3.6V or +4.5V to +5.5V Single-Supply

Operation

♦ Four User-Selectable Carrier Frequencies

308, 315, 418, and 433.92MHz

♦ -110dBm RF Input Sensitivity at 315MHz

♦ -109dBm RF Input Sensitivity at 433.92MHz

♦ Fast Startup (<250µs)

♦ Small 32-Pin Thin QFN Package

♦ Low Operating Supply Current

6.2mA Continuous

20nA Power-Down

♦ Integrated PLL, VCO, and Loop Filter

♦ 45dB Integrated Image Rejection

♦ Selectable IF BW with External Filter

♦ Positive and Negative Peak Detectors

♦ RSSI Output

MAX7042

308MHz/315MHz/418MHz/433.92MHz

Low-Power, FSK Superheterodyne Receiver

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MAX7042

THIN QFN

TOP VIEW

N.C.

FSEL1

FSEL2

DATA

LNASEL

N.C.

RSSI

XTAL2

XTAL1

LNAIN

DGND

OP+

DS+

DS-

PDMAX

PDMIN

IFIN+

IFIN-

AGND

MIXOUT

MIXIN-

MIXIN+

LNAOUT

LNASRC

Pin Configuration

Ordering Information

19-3704; Rev 0; 5/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

*EP = Exposed pad.

PART

TEMP

RANGE

PIN-PACKAGE PKG CODE

MAX7042ATJ

-40°C to

+125°C

32 Thin QFN-EP* 13255-3

Typical Application Circuit appears at end of data sheet.

1 2 3 4 5 6 ... 17 18

Shrnutí obsahu

Strany 1 - Ordering Information

General DescriptionThe MAX7042 fully integrated, low-power, CMOSsuperheterodyne RF receiver is designed to receive frequency-shift-keyed (FSK) data at

Strany 2 - DC ELECTRICAL CHARACTERISTICS

MAX7042308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver10 ______________________________________________________________________

Strany 3 - AC ELECTRICAL CHARACTERISTICS