MAXIM MAX7034 Technical data

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 (9.7mm x 4.4mm)
TSSOP package and is specified over the automotive
(-40°C to +125°C) temperature range.

Features

o Optimized for 315MHz or 433.92MHz Band

o Operates from Single +5.0V Supply

o Selectable Image-Rejection Center Frequency

o Selectable x64 or x32 fLO/f

XTAL

Ratio

o Low (< 6.7mA) Operating Supply Current

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

Efficient Power Cycling

o 250µs Startup Time

o Built-In 44dB RF Image Rejection

o Excellent Receive Sensitivity Over Temperature

o -40°C to +125°C Operation

MAX7034

315MHz/434MHz ASK Superheterodyne

Receiver

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration

Ordering Information

Applications

19-3109; Rev 2; 5/11

/V denotes an automotive qualified part.

+

Denotes a lead(Pb)-free/RoHS-compliant 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 PIN-PACKAGE

MAX7034AUI/V+T -40°C to +125°C 28 TSSOP

TOP VIEW

XTAL1

AVDD

LNAIN

LNASRC

AGND

LNAOUT

AVDD

MIXIN1

MIXIN2

AGND

IRSEL

MIXOUT

DGND

DVDD

+

1

2

3

4

5

MAX7034

6

7

8

9

10

11

12

13

14

TSSOP

28

27

26

25

24

23

22

21

20

19

18

17

16

15

XTAL2

SHDN

PDOUT

DATAOUT

V

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.

V

DD5

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

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

DVDD 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 (V

DVDD

+ 0.3V)

Continuous Power Dissipation (T

A

= +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

Soldering Temperature (reflow) .......................................+260°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

DD

SHDN

IH

OL

OH

+5.0V nominal supply voltage 4.5 5.0 5.5 V

fRF = 315MHz 6.7 8.2

fRF = 434MHz 7.2 8.7

V

= V

IRSEL

IRSEL

IRSEL

D V DD

= V

= 0V 0.4

/2 1.1

D V DD

V

IL

IH

V

= V

SHDN

V

SHDN

EN_REG, SHDN

XTALSEL

fRF = 434MHz, V

fRF = 375MHz, V

f

RF

I

SINK

I

SOURCE

DD5

= 0V 3 8 µA

= 315MHz, V

= 10µA 0.125 V

= 10µA

V

DD5

0.4

D V DD

0.4

D V DD

0.4

-

-

15 µA

-

V

V

-

D D 5

0.125

0.4 V

-

D V DD

1.5

mA

V

V

V

MAX7034

315MHz/434MHz ASK Superheterodyne

Receiver

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, V

DD5

= +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

DD5

= +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

ON

RF

OUT_MIX

IN_IF

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

f

RF

Bandpass response 10.7 MHz

P

< -120dBm 1.15

RFIN

P

> -40dBm 2.2

RFIN

= V

IRSEL

IRSEL

IRSEL

DVDD

= V

DVDD

= 0V 44

SHDN

250 µs

300 450 MHz

-50 dBm

330 Ω

42

/2 44

330 Ω

dBm

dBm

kbps

dB

V

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

RF

- 10.7MHz)/64 for

XTALSEL = 0V, and (f

RF

- 10.7MHz)/32 for XTALSEL = V

DVDD

.

AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, V

DD5

= +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

DD5

= +5.0V and TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DATA FILTER

Maximum Bandwidth 50 kHz

DATA SLICER

Comparator Bandwidth 100 kHz

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

Maximum Load Capacitance C

XTAL

LOAD

V

XTALSEL

V

XTALSEL

V

XTALSEL

V

XTALSEL

fRF = 433.92MHz

fRF = 315MHz

VDD5

= 0V 6.6128

= V

DVDD

= 0V 4.7547

= V

DVDD

13.2256

9.5094

10 pF

V

MHz

MAX7034

315MHz/434MHz ASK Superheterodyne

Receiver

_______________________________________________________________________________________ 5

Typical Operating Characteristics

(

Typical Application Circuit

, V

DD5

= +5.0V, fRF= 433.92MHz, TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

MAX7034 toc01

4.5 4.7 4.9 5.1 5.3 5.5

6.6

7.0

6.8

7.2

7.4

7.6

7.8

+105°C

+125°C

+85°C

+25°C

-40°C

SUPPLY CURRENT vs. RF FREQUENCY

RF FREQUENCY (MHz)

SUPPLY CURRENT (mA)

MAX7034 toc02

250 300 350 400 450 500

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

+105°C

+125°C

+85°C

+25°C

-40°C

BIT-ERROR RATE

vs. PEAK RF INPUT POWER

PEAK RF INPUT POWER (dBm)

BIT-ERROR RATE (%)

MAX7034 toc03

-130 -125 -120 -115 -110

0.01

0.10

1.00

10.00

100.00

315MHz

433.92MHz

SENSITIVITY vs. TEMPERATURE

TEMPERATURE (°C)

SENSITIVITY (dBm)

MAX7034 toc04

-40 -15 10 35 60 85 110

-120

-118

-116

-114

-112

-110

-108

-106

-104

-102

433.92MHz

315MHz

RSSI vs. RF INPUT POWER

RF INPUT POWER (dBm)

RSSI (V)

MAX7034 toc05

-140 -120 -100 -80 -60 -40 -20 0

1.00

1.20

1.40

1.60

1.80

2.00

2.20

2.40

IF BANDWIDTH = 280kHz

RSSI AND DELTA vs. IF INPUT POWER

IF INPUT POWER (dBm)

RSSI (V)

DELTA

MAX7034 toc06

-25

-20

-15

-10

-5

0

5

10

15

-90 -80 -70 -60 -50 -40 -30 -20 -10 0 10

1.00

1.20

1.40

1.60

1.80

2.00

2.20

2.40

RSSI

DELTA

LNA/MIXER VOLTAGE GAIN

vs. IF FREQUENCY

IF FREQUENCY (MHz)

LNA/MIXER VOLTAGE GAIN (dB)

MAX7034 toc07

0 5 10 15 20 25 30

-5

5

15

25

35

45

55

65

UPPER SIDEBAND

LOWER SIDEBAND

49.7dB
IMAGE

REJECTION

IMAGE REJECTION vs. RF FREQUENCY

RF FREQUENCY (MHz)

IMAGE REJECTION (dB)

MAX7034 toc08

280 300 320 340 360 380 400 420 440 460 480

0

10

20

30

40

50

60

fRF = 315MHz

fRF = 433.92MHz

IMAGE REJECTION vs. TEMPERATURE

TEMPERATURE (°C)

IMAGE REJECTION (dB)

MAX7034 toc09

-40 -15 10 35 60 85 110

40

42

44

46

48

50

52

433.92MHz

315MHz