Rainbow Electronics MAX7034 User Manual

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.

General Description

The MAX7034 fully integrated low-power CMOS superheterodyne receiver is ideal for receiving amplitudeshift-keyed (ASK) data in the 300MHz to 450MHz frequency range (including the popular 315MHz and

433.92MHz frequencies). The receiver has an RF sensitivity of -114dBm. With few external components and a low-current power-down mode, it is ideal for cost-sensitive and power-sensitive applications typical in the automotive and consumer markets. The MAX7034 consists of a low-noise amplifier (LNA), a fully differential image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO), a 10.7MHz IF limiting amplifier stage with received-signal-strength indicator (RSSI), and analog baseband data-recovery circuitry.

The MAX7034 is available in a 28-pin TSSOP package and is specified over the automotive (-40°C to +125°C) temperature range.

Features

♦ Optimized for 315MHz or 433.92MHz Band

♦ Operates from Single +5.0V Supply

♦ Selectable Image-Rejection Center Frequency

♦ Selectable x64 or x32 f

LO/fXTAL

Ratio

♦ Low (< 6.7mA) Operating Supply Current

♦ < 3.0µA Low-Current Power-Down Mode for

Efficient Power Cycling

♦ 250µs Startup Time

♦ Built-In 44dB RF Image Rejection

♦ Excellent Receive Sensitivity Over Temperature

♦ -40°C to +125°C Operation

MAX7034

315MHz/434MHz ASK Superheterodyne

Receiver

________________________________________________________________

Maxim Integrated Products

Pin Configuration

Ordering Information

Applications

19-3109; Rev 0; 1/08

Denotes a lead-free package.

T = Tape-and-reel.

Typical Application Circuit appears at end of data sheet.

Automotive Remote Keyless Entry

Security Systems

Garage Door Openers

Home Automation

Remote Controls

Local Telemetry

Wireless Sensors

PART TEMP RANGE

MAX7034AUI+T -40°C to +125°C

PINPACKAGE

28 TSSOP (9.7mm x

4.4mm)

PKG CODE

U28-1

TOP VIEW

XTAL1

LNAIN

LNASRC

AGND

LNAOUT

MIXIN1

MIXIN2

AGND

MIXOUT

DGND

IRSEL

MAX7034

TSSOP

XTAL2

SHDN

PDOUT

DATAOUT

DD5

DSP

DFFB

OPP

DSN

DFO

IFIN2

IFIN1

XTALSEL

EN_REG

MAX7034

315MHz/434MHz ASK Superheterodyne Receiver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, V

DD5

= +4.5V to +5.5V, no RF signal applied. TA= -40°C to +125°C, unless otherwise noted. Typical val-

ues are at V

DD5

= +5.0V and TA= +25°C, unless otherwise noted.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

DD5

to AGND.......................................................-0.3V to +6.0V

to AGND ......................................................-0.3V to +4.0V

to DGND......................................................-0.3V to +4.0V

AGND to DGND.....................................................-0.1V to +0.1V

IRSEL, DATAOUT, XTALSEL,

SHDN, EN_REG to AGND ....................-0.3V to (V

DD5

+ 0.3V)

All Other Pins to AGND............................-0.3V to (DV

+ 0.3V)

Continuous Power Dissipation (T

= +70°C)

28-Pin TSSOP (derate 12.8mW/°C above +70°C) ..1025.6mW

Operating Temperature Range .........................-40°C to +125°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Supply Voltage V

Supply Current I

Shutdown Supply Current I

Input-Voltage Low V

Input-Voltage High V

Input Logic Current High I

Image-Reject Select Voltage (Note 2)

DATAOUT Output-Voltage Low V

DATAOUT Output-Voltage High V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DD5

SHDN

+5.0V nominal supply voltage 4.5 5.0 5.5 V

fRF = 315MHz 6.7 8.2

fRF = 434MHz 7.2 8.7

= D V

IRSEL

D D

= D V

= 0V 0.4

/2 1.1

D D

= V

SHDN

EN_REG, SHDN

XTALSEL

fRF = 434MHz, V

fRF = 375MHz, V

SINK

SOURCE

DD5

= 0V 3 8 µA

= 315MHz, V

= 10µA 0.125 V

= 10µA

DD5

D V

0.4

D D

0.4

D D

0.4

15 µA

D D 5

0.125

0.4 V

D V

D D

1.5

MAX7034

315MHz/434MHz ASK Superheterodyne

Receiver

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, V

VDD5

= +4.5V to +5.5V, all RF inputs are referenced to 50Ω, fRF= 433.92MHz, TA= -40°C to +125°C,

unless otherwise noted. Typical values are at V

VDD5

= +5.0V and TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

GENERAL CHARACTERISTICS

Startup Time t

Receiver Input Frequency Range f

Maximum Receiver Input Level 0 dBm

Sensitivity at TA = +25oC (Note 3)

Sensitivity at TA = +125°C (Note 3)

Maximum Data Rate

LNA/MIXER

LNA/Mixer Voltage Gain (Note 4) 330Ω IF filter load 45 dB

LNA/Mixer Input-Referred 1dB Compression Point

Mixer Output Impedance Z

Mixer Image Rejection

INTERMEDIATE FREQUENCY (IF)

Input Impedance Z

Operating Frequency f

3dB Bandwidth 10 MHz

RSSI Linearity ±0.5 dB

RSSI Dynamic Range 80 dB

RSSI Level

OUT_MIX

IN_IF

Time for valid signal detection after V = V

. Does not include baseband filter

DD5

settling.

+25°C, 315MHz -114

+25°C, 434MHz -113

+125°C, 315MHz -113

+125°C, 434MHz -110

Manchester coded 33

NRZ coded 66

fRF = 434MHz, V

fRF = 375MHz, V

= 315MHz, V

Bandpass response 10.7 MHz

< -120dBm 1.15

RFIN

> -40dBm 2.2

RFIN

= DV

IRSEL

= DVDD/2 44

= 0V 44

SHDN

250 µs

300 450 MHz

-50 dBm

330 Ω

dBm

kbps

MAX7034

315MHz/434MHz ASK Superheterodyne Receiver

4 _______________________________________________________________________________________

Note 1: 100% tested at TA= +125°C. Guaranteed by design and characterization over entire temperature range. Note 2: IRSEL is internally set to 375MHz IR mode. It can be left open when the 375MHz image-rejection setting is desired. Bypass

to AGND with a 1nF capacitor in a noisy environment.

Note 3: Peak power level. BER = 2 x 10

-3

, Manchester encoded, data rate = 4kbps, IF bandwidth = 280kHz.

Note 4: The voltage conversion gain is measured with the LNA input matching inductor and the LNA/Mixer resonator in place, and

does not include the IF filter insertion loss.

Note 5: Crystal oscillator frequency for other RF carrier frequency within the 300MHz to 450MHz range is (f

- 10.7MHz)/64 for

XTALSEL = 0V, and (f

- 10.7MHz)/32 for XTALSEL = DVDD.

AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, V

VDD5

= +4.5V to +5.5V, all RF inputs are referenced to 50Ω, fRF= 433.92MHz, TA= -40°C to +125°C,

unless otherwise noted. Typical values are at V

VDD5

= +5.0V and TA= +25°C.) (Note 1)

DATA FILTER

Maximum Bandwidth 50 kHz

DATA SLICER

Comparator Bandwidth 100 kHz

Maximum Load Capacitance C

Output High Voltage V

Output Low Voltage 0V

CRYSTAL OSCILLATOR

Crystal Frequency (Note 5) f

Crystal Tolerance 50 ppm

Input Capacitance From each pin to ground 6.2 pF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LOAD

XTAL

fRF = 433.92MHz

fRF = 315MHz

XTALSEL

10 pF

VDD5

= 0V 6.6128

= DV

= 0V 4.7547

= DV

13.2256

9.5094

MHz

+ 9 hidden pages