MAXIM MAX7033 Technical data

General Description

The MAX7033 fully integrated low-power CMOS super­heterodyne receiver is ideal for receiving amplitude­shift-keyed (ASK) data in the 300MHz to 450MHz
frequency range. The receiver has an RF input signal
range of -114dBm to 0dBm. 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
MAX7033 consists of a low-noise amplifier (LNA), a fully
differential image-rejection mixer, an on-chip phase­locked 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 MAX7033
also has a discrete one-step automatic gain control
(AGC) that reduces the LNA gain by 35dB when the RF
input signal exceeds -62dBm. The AGC circuitry offers
an externally controlled hold feature.

The MAX7033 is available in 28-pin TSSOP and
32-pin TQFN packages and is specified over the
extended (-40°C to +105°C) temperature range.

Features

o Optimized for 315MHz or 433MHz Band

o Operates from Single +3.3V or +5.0V Supplies

o High Dynamic Range with On-Chip AGC

o AGC Hold Circuit

o 1ms AGC Release Time

o Selectable Image-Rejection Center Frequency

o Selectable x64 or x32 f

LO/fXTAL

Ratio

o Low 5.2mA Operating Supply Current

o < 3.5µA Low-Current Power-Down Mode for

Efficient Power Cycling

o 250µs Startup Time

o Built-In 44dB RF Image Rejection

o Better than -114dBm Receive Sensitivity

o -40°C to +105°C Operation

MAX7033

315MHz/433MHz ASK Superheterodyne

Receiver with AGC Lock

________________________________________________________________

Maxim Integrated Products

1

Pin Configurations

Ordering Information

Applications

19-3273; Rev 3; 9/11

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.

+

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

*

EP = Exposed pad.

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

TOP VIEW

LNASRC

LNAOUT

MIXOUT

+

1

XTAL1

2

AVDD

3

LNAIN

4

5

AGND

6

7

AVDD

8

MIXIN1

9

MIXIN2

10

AGND

11

IRSEL

12

13

DGND

14

DVDD

MAX7033

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

AC

PART TEMP RANGE PIN-PACKAGE

MAX7033EUI+ -40°C to +105°C 28 TSSOP

MAX7033ETJ+ -40°C to +105°C 32 TQFN-EP*

AVDD

XTAL1

XTAL2

SHDN

282726

131415

N.C.

XTALSEL

PDOUT

IFIN1

25 N.C.

16IFIN2

24 DATAOUT

23

V

DD5

22

DSP

21

N.C.

20

DFFB

19

OPP

18

DSN

17

DFO

AGND

LNAOUT

AVDD

MIXIN1

MIXIN2

AGND

IRSEL

LNASRC

LNAIN

32

313029

+

1N.C.

2

3

4

9

MIXOUT

MAX7033

101112

DVDD

DGND

TQFN

AC

5

6

7

8

MAX7033

315MHz/433MHz ASK Superheterodyne
Receiver with AGC Lock

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS (+3.3V OPERATION)

(

Typical Application Circuit

, V

AVDD

= V

DVDD

= V

DD5

= +3.0V to +3.6V, no RF signal applied, TA= -40°C to +105°C, unless otherwise

noted. Typical values are at V

AVDD

= V

DVDD

= V

DD5

= +3.3V and TA= +25°C.) (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,

AC, SHDN 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

32-Thin QFN (derate 21.3mW/°C above +70°C) ....1702.1mW

Operating Temperature Range .........................-40°C to +105°C

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

Storage Temperature Range .............................-60°C to +150°C

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

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

DC ELECTRICAL CHARACTERISTICS (+5.0V OPERATION)

(

Typical Application Circuit

, V

DD5

= +4.5V to +5.5V, no RF signal applied, TA= -40°C to +105°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

Supply Voltage

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

V

AVDD

V

DVDD

DD

SHDN

,

+3.3V nominal supply voltage 3.0 3.3 3.6 V

fRF = 315MHz 5.2 6.23

fRF = 433MHz 5.7 6.88

fRF = 315MHz 2.6

f

= 433MHz 3.5 8.0

RF

= V

IRSEL

IRSEL

IRSEL

DD5

= V

/2 1.1

DD5

= 0V 0.4

IL

IH

IH

OL

OH

V

= V

SHDN

V

SHDN

V

XTALSEL

DVDD

= 0V,

= 0V

fRF = 433MHz, V

fRF = 375MHz, V

= 315MHz, V

f

RF

I

= 10μA 0.125 V

SINK

I

SOURCE

= 10μA

V

DVDD

- 0.4

V

DD5

0.4

10 μA

-

V

DVDD

- 0.125

0.4 V

V

-

DD5

1.0

mA

μA

V

V

V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I

Shutdown Supply Current I

Input-Voltage Low V

DD5

DD

SHDN

+5.0V nominal supply voltage 4.5 5.0 5.5 V

V

= V

SHDN

V

SHDN

V

XTALSEL

IL

DD5

= 0V,

= 0V

fRF = 315MHz 5.2 6.4

fRF = 433MHz 5.7 6.76

fRF = 315MHz 3.7

f

= 433MHz 4.2 9.8

RF

mA

μA

0.4 V

MAX7033

315MHz/433MHz ASK Superheterodyne

Receiver with AGC Lock

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (+5.0V OPERATION) (continued)

(

Typical Application Circuit

, V

DD5

= +4.5V to +5.5V, no RF signal applied, TA= -40°C to +105°C, unless otherwise noted. Typical

values are at V

DD5

= +5.0V and TA= +25°C.) (Note 1)

AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, V

AVDD

= V

DVDD

= V

DD5

= +3.0V to +3.6V, all RF inputs are referenced to 50Ω, fRF= 315MHz,

T

A

= -40°C to +105°C, unless otherwise noted. Typical values are at V

AVDD

= V

DVDD

= V

DD5

= +3.3V and TA= +25°C.) (Note 1)

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

V

-

V

DD5

0.4

DD5

0.4

15 μA

-

V

V

-

DD5

0.125

IH

IH

OL

OH

fRF = 433MHz, V

fRF = 375MHz, V

f

= 315MHz, V

RF

I

= 10μA 0.125 V

SINK

I

SOURCE

= 10μA

= V

IRSEL

IRSEL

IRSEL

DD5

= V

/2 1.1

DD5

= 0V 0.4

DD5

1.5

-

GENERAL CHARACTERISTICS

Startup Time t

Receiver Input Frequency f

Maximum Receiver Input Level Modulation depth >18dB 0 dBm

Sensitivity (Note 3)

AGC Hysteresis

Maximum Data Rate

LNA IN HIGH-GAIN MODE

1dB Compression Point P1dB

Input-Referred 3rd-Order
Intercept

LO Signal Feedthrough to
Antenna

Noise Figure NF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

IIP3

ON

RF

IN_LNA

LNA

LNA

LNA

Time for valid signal detection after V
= V

DVDD

Average carrier power level -120

Peak power level -114

LNA gain from low to high 8 dB

Switching time from low to high gain 1 ms

Manchester coded 33

NRZ coded 66

Normalized to 50Ω

fRF = 433MHz 1 - j3.4

fRF = 375MHz 1 - j3.9Input Impedance Z

= 315MHz 1 - j4.7

f

RF

SHDN

300 450 MHz

250 μs

-22 dBm

-12 dBm

-80 dBm

3dB

V

V

V

dBm

kbps

MAX7033

315MHz/433MHz ASK Superheterodyne
Receiver with AGC Lock

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, V

AVDD

= V

DVDD

= V

DD5

= +3.0V to +3.6V, all RF inputs are referenced to 50Ω, fRF= 315MHz,

T

A

= -40°C to +105°C, unless otherwise noted. Typical values are at V

AVDD

= V

DVDD

= V

DD5

= +3.3V and TA= +25°C.) (Note 1)

LNA IN LOW-GAIN MODE

Input Impedance Z

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

1dB Compression Point P1dB

Input-Referred 3rd-Order
Intercept

LO Signal Feedthrough to
Antenna

Noise Figure NF

Voltage-Gain Reduction AGC enabled (depends on tank Q) 35 dB

MIXER

Input-Referred 3rd-Order
Intercept

Output Impedance Z

Noise Figure NF

Image Rejection
(Not Including LNA Tank)

LNA/Mixer Voltage Gain 330Ω IF filter load

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

AGC Threshold

DATA FILTER

Maximum Bandwidth 50 kHz

DATA SLICER

Comparator Bandwidth 100 kHz

IN_LNA

IIP3

IIP3

OUT_MIX

IN_IF

LNA

LNA

LNA

MIX

MIX

IF

Normalized to 50Ω
(Note 4)

fRF = 433MHz, V

fRF = 375MHz, V

f

= 315MHz, V

RF

Bandpass response 10.7 MHz

P

< -120dBm 1.15

RFIN

> 0dBm, AGC enabled 2.2

P

RFIN

LNA gain from low to high 1.39

LNA gain from high to low 1.98

IRSEL

IRSEL

IRSEL

fRF = 433MHz 1 - j3.4

fRF = 375MHz 1 - j3.9

f

= 315MHz 1 - j4.7

RF

= V

DVDD

= V

DVDD

= 0V 44

LNA in high-gain
mode

LNA in low-gain
mode

/2 44

-10 dBm

-7 dBm

-80 dBm

3dB

-18 dBm

330 Ω

16 dB

42

48

13

330 Ω

dB

dB

V

V

MAX7033

315MHz/433MHz ASK Superheterodyne

Receiver with AGC Lock

_______________________________________________________________________________________ 5

Note 1: 100% tested at TA= +25°C. Guaranteed by design and characterization over temperature.
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: BER = 2 x 10

-3

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

Note 4: Input impedance is measured at the LNAIN pin. Note that the impedance includes the 15nH inductive degeneration con-

nected from the LNA source to ground. The equivalent input circuit is 50Ω in series with 2.2pF.

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

DD5

.

AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, V

AVDD

= V

DVDD

= V

DD5

= +3.0V to +3.6V, all RF inputs are referenced to 50Ω, fRF= 315MHz,

T

A

= -40°C to +105°C, unless otherwise noted. Typical values are at V

AVDD

= V

DVDD

= V

DD5

= +3.3V and TA= +25°C.) (Note 1)

Typical Operating Characteristics

(

Typical Application Circuit

, V

AVDD

= V

DVDD

= V

DD5

= +3.3V, fRF= 315MHz, TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX7033 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

3.53.43.33.23.1

4.2

4.4

4.6

4.8

5.0

5.2

5.4

5.6

5.8

6.0

4.0

3.0 3.6

+85°C

+105°C

+25°C

-40°C

SUPPLY CURRENT

vs. RF FREQUENCY

MAX7033 toc02

RF FREQUENCY (MHz)

SUPPLY CURRENT (mA)

450400300 350

3.5

4.0

4.5

5.0

6.0

5.5

6.5

7.0

3.0
250 500

+105°C

+85°C

-40°C

+25°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Maximum Load Capacitance C

LOAD

Output High Voltage V

10 pF

DD5

V

Output Low Voltage 0V

CRYSTAL OSCILLATOR

Crystal Frequency (Note 5) f

XTAL

fRF = 433MHz

fRF = 315MHz

V

V

V

V

= 0V 6.6128

XTALSEL

= V

XTALSEL

XTALSEL

XTALSEL

DD5

= 0V 4.7547

= V

DD5

13.2256

9.5094

MHz

Crystal Tolerance 50 ppm

Input Capacitance From each pin to ground 6.2 pF

vs. AVERAGE CARRIER POWER

100

10

1

BIT-ERROR RATE (%)

0.1

0.01

-130 -114
AVERAGE CARRIER POWER (dBm)

BIT-ERROR RATE

fRF = 433MHz

fRF = 315MHz

-116-118-120-122-124-126-128

MAX7033 toc03