MAX7031MATJ50+T Maxim Integrated Products, MAX7031MATJ50+T Datasheet

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MAX7031MATJ50+T

Manufacturer Part Number
MAX7031MATJ50+T
Description
RF Receiver IC TXRX FSK W/PLL-EP 5MHz, and 433.92MHz
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX7031MATJ50+T

Package / Case
TQFN-32 EP
Operating Frequency
433.92 MHz
Operating Supply Voltage
2.7 V, 5 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX7031 crystal-based, fractional-N transceiver is
designed to transmit and receive FSK data at factory-
preset carrier frequencies of 308MHz
433.92MHz with data rates up to 33kbps (Manchester
encoded) or 66kbps (NRZ encoded). This device gen-
erates a typical output power of +10dBm into a 50Ω
load, and exhibits typical sensitivity of -110dBm. The
MAX7031 features separate transmit and receive pins
(PAOUT and LNAIN) and provides an internal RF switch
that can be used to connect the transmit and receive
pins to a common antenna.
The MAX7031 transmit frequency is generated by a 16-
bit, fractional-N, phase-locked loop (PLL), while the
receiver’s local oscillator (LO) is generated by an inte-
ger-N PLL. This hybrid architecture eliminates the need
for separate transmit and receive crystal reference
oscillators because the fractional-N PLL is preset to be
10.7MHz above the receive LO. Retaining the fixed-N
PLL for the receiver avoids the higher current-drain
requirements of a fractional-N PLL and keeps the
receiver current drain as low as possible.
The fractional-N architecture of the MAX7031 transmit
PLL allows the transmit FSK signal to be preset for
exact frequency deviations, and completely eliminates
the problems associated with oscillator-pulling FSK sig-
nal generation. All frequency-generation components
are integrated on-chip, and only a crystal, a 10.7MHz IF
filter, and a few discrete components are required to
implement a complete antenna/digital data solution.
The MAX7031 is available in a small, 5mm x 5mm, 32-
pin, thin QFN package, and is specified to operate in
the automotive -40°C to +125°C temperature range.
19-3707; Rev 3; 11/10
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.
Consult factory for availability.
2-Way Remote Keyless Entry
Security Systems
Home Automation
Remote Controls
Remote Sensing
Smoke Alarms
Garage-Door Openers
Local Telemetry Systems
Low-Cost, 308MHz, 315MHz, and 433.92MHz
________________________________________________________________ Maxim Integrated Products
FSK Transceiver with Fractional-N PLL
General Description
Applications
, 315MHz, or
o +2.1V to +3.6V or +4.5V to +5.5V Single-Supply
o Single-Crystal Transceiver
o Factory-Preset Frequency (No Serial Interface
o FSK Modulation
o Factory-Preset FSK Frequency Deviation
o +10dBm Output Power into 50Ω Load
o Integrated TX/RX Switch
o Integrated Transmit and Receive PLL, VCO, and
o > 45dB Image Rejection
o Typical RF Sensitivity*: -110dBm
o Selectable IF Bandwidth with External Filter
o RSSI Output with High Dynamic Range
o < 12.5mA Transmit-Mode Current
o < 6.7mA Receive-Mode Current
o < 800nA Shutdown Current
o Fast-On Startup Feature, < 250µs
o Small, 32-Pin, Thin QFN Package
* 0.2% BER, 4kbps Manchester-encoded data, 280kHz IF BW
+ Denotes a lead(Pb)-free/RoHs-compliant package.
** EP = Exposed pad.
Note: The MAX7031 is available with factory-preset operating
frequencies. See the Selector Guide for complete part num-
bers.
Pin Configuration, Selector Guide, Typical Application
Circuit, and Functional Diagram appear at end of data sheet.
MAX7031_ATJ__+
Operation
Required)
Loop Filter
PART
-40°C to +125°C
TEMP RANGE
Ordering Information
32 Thin QFN-EP**
PIN-PACKAGE
Features
1

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MAX7031MATJ50+T Summary of contents

Page 1

... Home Automation Remote Controls Remote Sensing Smoke Alarms Garage-Door Openers Local Telemetry Systems ________________________________________________________________ Maxim Integrated Products 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. o +2.1V to +3.6V or +4.5V to +5.5V Single-Supply Operation † , 315MHz, or ...

Page 2

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL ABSOLUTE MAXIMUM RATINGS HVIN to GND .........................................................-0.3V to +6.0V PAVDD, AVDD, DVDD to GND..............................-0.3V to +4.0V ENABLE, T/R, DATA, AGC0, AGC1, AUTOCAL to GND ...............................-0. All Other Pins ...

Page 3

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS ( Typical Application Circuit , 50Ω system impedance, V 433.92MHz -40°C to +125°C, unless otherwise noted. Typical values are +25°C, ...

Page 4

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , 50Ω system impedance, V 433.92MHz -40°C to +125°C, unless otherwise noted. Typical values are ...

Page 5

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , 50Ω system impedance, V 433.92MHz -40°C to +125°C, unless otherwise noted. Typical values are ...

Page 6

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL ( Typical Operating Circuit , PAVDD AVDD encoded, 0.2% BER deviation = ±50kHz, T BIT-ERROR RATE vs. AVERAGE INPUT POWER 100 280kHz ...

Page 7

Low-Cost, 308MHz, 315MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL ( Typical Operating Circuit , PAVDD encoded, 0.2% BER deviation = ±50kHz, T S11 vs. RF FREQUENCY 0 -6 -12 433.92MHz -18 -24 200 250 300 350 ...

Page 8

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL ( Typical Operating Circuit , PAVDD encoded, 0.2% BER deviation = ±50kHz, T SUPPLY CURRENT vs. SUPPLY VOLTAGE 315MHz +85°C ...

Page 9

Low-Cost, 308MHz, 315MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL ( Typical Operating Circuit , PAVDD encoded, 0.2% BER deviation = ±50kHz, T PHASE NOISE vs. OFFSET FREQUENCY (TRANSMIT MODE) - 315MHz RF -50 -60 ...

Page 10

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL PIN NAME Power-Amplifier Supply Voltage. Bypass to GND with 0.01µF and 220pF capacitors placed as close 1 PAVDD as possible to the pin. Envelope-Shaping Output. ROUT controls the power-amplifier envelope’s ...

Page 11

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL PIN NAME 28 AUTOCAL Enable (Logic-High) to Allow FSK Demodulator Calibration. Bypass to GND with a 10pF capacitor. 29 AGC1 AGC Enable/Dwell Time Control 1. See Table 1. Bypass to ...

Page 12

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL Table 1. AGC Dwell Time Settings for MAX7031 AGC1 AGC0 DESCRIPTION 0 0 AGC disabled, high gain selected 11, short dwell time ...

Page 13

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL MAX7031 DATA SLICER DATA DS- DS Figure 3. Generating Data Slicer Threshold Using a Lowpass Filter generates a 100mV signal on the control line. This P-P control voltage ...

Page 14

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL The data slicer takes the analog output of the data filter and converts digital signal. This is achieved by using a comparator and comparing the analog input ...

Page 15

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL Bypass T/R, ENABLE, DATA, AGC0-1, and AUTOCAL with 10pF capacitors to GND. Place all bypass capaci- tors as close to the respective pins as possible. Transmit/Receive Antenna Switch The MAX7031 ...

Page 16

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL 3.0V C23 C24 R3 *OPTIONAL POWER-ADJUST RESISTOR 16 ______________________________________________________________________________________ C20 C21 ...

Page 17

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL Table 3. Component Values for Typical Application Circuit COMPONENT C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 ...

Page 18

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL LNAOUT MIXIN LNAIN LNA LNASRC 8 XTAL1 31 CRYSTAL OSCILLATOR XTAL2 32 3.0V HVIN 27 REGULATOR AVDD 6 EXPOSED PAD 2 ROUT 18 ______________________________________________________________________________________ MIXIN- MIXOUT IFIN+ ...

Page 19

Low-Cost, 308MHz, 315MHz, and 433.92MHz FSK Transceiver with Fractional-N PLL For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may ...

Page 20

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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