Rainbow Electronics MAX7036 User Manual

General Description

The MAX7036 low-cost receiver is designed to receive amplitude-shift-keyed (ASK) and on-off-keyed (OOK) data in the 300MHz to 450MHz frequency range. The receiver has an RF input signal range of -109dBm to 0dBm.

The MAX7036 requires few external components and has a power-down pin to put it in a low-current sleep mode, making it ideal for cost- and power-sensitive applications. The low-noise amplifier (LNA), phaselocked loop (PLL), mixer, IF filter, received-signalstrength indicator (RSSI), and baseband sections are all on-chip. The MAX7036 uses a very-low intermediate frequency (VLIF) architecture. The MAX7036 integrates the IF filter on-chip and therefore eliminates an external ceramic filter, reducing the bill-of-materials cost. The device also contains an on-chip automatic gain control (AGC) that reduces the LNA gain by 30dB when the input signal power is large. The MAX7036 operates from either a 5V or a 3.3V power supply and draws

5.5mA (typ) of current.

The MAX7036 is available in a 20-pin thin QFN package with an exposed pad and is specified over the AEC-Q100 Level 2 (-40°C to +105°C) temperature range.

Applications

Low-Cost RKE

Garage Door Openers

Remote Controls

Home Automation

Sensor Networks

Security Systems

Features

o ASK/OOK Modulation

o < 250µs Enable Turn-On Time

o On-Chip PLL, VCO, Mixer, IF, Baseband

o Low IF (200kHz Nominal)

o 5.5mA DC Current

o 1µA Standby Current

o 3.3V/5V Operation

o Small 20-Pin Thin QFN Package with an Exposed

Pad

MAX7036

300MHz to 450MHz ASK Receiver

with Internal IF Filter

________________________________________________________________

Maxim Integrated Products

Pin Configuration

Ordering Information

19-4386; Rev 0; 3/09

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.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

-40°C to +105°C

20 Thin QFN-EP*

Denotes an automative qualified part.

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

EP = Exposed pad.

MAX7036GTP/V+

TOP VIEW

DSP

DSN

PDOUT

DATAOUT

OPP

DFFB

15 14 12 11

MAX7036

DCOC

DVDD

EP*

IFC3

IFC1

IFC2

MIXIN1

MIXIN2

LNAOUT

XTAL2

ENABLE

THIN QFN

5mm x 5mm

AVDD

XTAL1

LNAIN

MAX7036

300MHz to 450MHz ASK Receiver with Internal IF Filter

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

3.3V DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, 50Ω system impedance, V

AVDD

= V

DVDD

= VDD= 3.0V to 3.6V, fRF= 300MHz to 450MHz, TA= -40°C to

+105°C, unless otherwise noted. Typical values are at V

AVDD

= V

DVDD

= VDD= 3.3V, TA= +25°C, unless otherwise noted.) (100%

tested at T

= +105°C.)

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.

VDDto GND...........................................................-0.3V to +6.0V

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

DVDD to GND........................................................-0.3V to +4.0V

ENABLE to GND.........................................-0.3V to (V

+ 0.3V)

LNAIN to GND .......................................................-0.3V to +1.2V

All Other Pins to GND.............................-0.3V to (V

DVDD

+ 0.3V) Continuous Power Dissipation (T

= +70°C)

20-Pin TQFN (derate 20.8mW/°C above +70°C) ....1666.7mW

Junction-to-Case Thermal Resistance (θ

) (Note 1)

20-Pin TQFN...................................................................2°C/W

Junction-to-Ambient Thermal Resistance (θ

) (Note 1)

20-Pin TQFN.................................................................48°C/W

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

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

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

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

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a single-

layer board. For detailed information on package thermal considerations, go to www.maxim-ic.com/thermal-tutorial

Supply Voltage V

Supply Current I

DIGITAL INPUT (ENABLE)

Input High Voltage V

Input Low Voltage V

Input Current I

DIGITAL OUTPUT (DATAOUT)

Output Low Voltage V

Output High Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

AVDD

TA < +105°C

AVDD

0 ≤ V

SINK

SOURCE

ENABLE

= V

DVDD

= V

DVDD

= V

DVDD

≤ V

ENABLE

= 100µA 0.4 V

= 100µA

= V

fRF = 315MHz 5.3 6.7

fRF = 433MHz 5.8 7.3

Deep-sleep mode,

ENABLE

= 0

= V

3.0 3.3 3.6 V

VDD -

0.4

1 2.7 µA

0.4 V

20 µA

MAX7036

300MHz to 450MHz ASK Receiver

with Internal IF Filter

_______________________________________________________________________________________ 3

5.0V DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, 50Ω system impedance, VDD= 4.5V to 5.5V, fRF= 300MHz to 450MHz, TA= -40°C to +105°C, unless

otherwise noted. Typical values are at V

= 5.0V, TA= +25°C, unless otherwise noted.) (100% tested at TA= +105°C.)

AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, 50Ω system impedance, V

AVDD

= V

DVDD

= VDD= 3.0V to 3.6V, fRF= 300MHz to 450MHz, TA= -40°C to

+105°C, unless otherwise noted. Typical values are at V

AVDD

= V

DVDD

= VDD= 3.3V, TA= +25°C, fRF= 315MHz, unless otherwise

noted.) (100% tested at T

= +105°C.)

Supply Voltage V

Supply Current I

DIGITAL INPUT (ENABLE)

Input High Voltage V

Input Low Voltage V

Input Current I

DIGITAL OUTPUT (DATAOUT)

Output Low Voltage V

Output High Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

TA < +105°C

= V

AVDD

0 ≤ V

SINK

SOURCE

DVDD

= V

DVDD

≤ V

ENABLE

= 100µA 0.4 V

= 100µA

ENABLE

4.5 5.0 5.5 V

fRF = 315MHz 5.4 6.8

fRF = 433MHz 5.9 7.4

Deep-sleep mode,

ENABLE

= 0

VDD -

0.4

1 3.4 µA

0.4 V

20 µA

Receiver Input Frequency Range f

Maximum Receiver Input Level P

Sensitivity (Note 2)

Power-On Time t

AGC Hysteresis 5dB

AGC Low Gain-to-High Gain Switching Time

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RFIN

fRF = 315MHz -109

= 433MHz -107

Time for valid RSSI output, does not include baseband filter settling

300 450 MHz

0 dBm

Enable power on (V

> 3.0V)

power on 1 ms

250 µs

13 ms

dBm

MAX7036

300MHz to 450MHz ASK Receiver with Internal IF Filter

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, 50Ω system impedance, V

AVDD

= V

DVDD

= VDD= 3.0V to 3.6V, fRF= 300MHz to 450MHz, TA= -40°C to

+105°C, unless otherwise noted. Typical values are at V

AVDD

= V

DVDD

= VDD= 3.3V, TA= +25°C, fRF= 315MHz, unless otherwise

noted.) (100% tested at T

= +105°C.)

Note 2: BER = 2 x 10-3, Manchester coded, data rate = 4kbps. IF bandwidth = 400kHz.

LNA/MIXER

LNA Input Impedance Z

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LO Signal Feedthrough to Antenna

Voltage Gain Reduction Low-gain mode, AGC enabled 29 dB

LNA/Mixer Voltage Gain

3dB Cutoff Frequency BW

RSSI Linearity ±0.5 dB

RSSI Dynamic Range Includes AGC 80 dB

RSSI Level

Intermediate Frequency f

Maximum Data-Filter Bandwidth BW

Maximum Data-Slicer Bandwidth BW

Maximum Peak Detector Bandwidth

Maximum Data Rate

Crystal Frequency f

Crystal Load Capacitance C

INLNA

XTAL

LOAD

Normalized to 50Ω

High-gain LNA mode 55

Low-gain LNA mode 26

Set by capacitors on IFC1 and IFC2 (see the Typical Application Circuit)

< -120dBm 1.34

RFIN

> 0dBm, AGC enabled 2.35

RFIN

Manchester coded 33

Nonreturn to zero (NRZ) 66

fRF = 315MHz

= 433MHz

9.36 14.06 MHz

0.4 j5.6

0.4 j4.0

-75 dBm

400 kHz

200 kHz

50 kHz

100 kHz

50 kHz

10 pF

kbps

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