Design Filtration TXH-4 Specifications download pdf

General Description

The MAX7032 crystal-based, fractional-N transceiver is

designed to transmit and receive ASK/OOK or FSK

data in the 300MHz to 450MHz frequency range with

data rates up to 33kbps (Manchester encoded) or

66kbps (NRZ encoded). This device generates a typi-

cal output power of +10dBm into a 50Ω load, and

exhibits typical sensitivities of -114dBm for ASK data

and -110dBm for FSK data. The MAX7032 features sep-

arate 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 MAX7032 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 allows the

transmit frequency to be set within 2kHz of the receive

frequency. The 12-bit resolution of the fractional-N PLL

allows frequency multiplication of the crystal frequency

in steps of f

XTAL

/4096. 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 MAX7032 transmit

PLL allows the transmit FSK signal to be programmed 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 imple-

ment a complete antenna/digital data solution.

The MAX7032 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.

Applications

2-Way Remote Keyless Entry

Security Systems

Home Automation

Remote Controls

Remote Sensing

Smoke Alarms

Garage Door Openers

Local Telemetry Systems

Features

♦ +2.1V to +3.6V or +4.5V to +5.5V Single-Supply

Operation

♦ Single Crystal Transceiver

♦ User-Adjustable 300MHz to 450MHz Carrier

Frequency

♦ ASK/OOK and FSK Modulation

♦ User-Adjustable FSK Frequency Deviation

Through Fractional-N PLL Register

♦ Agile Transmitter Frequency Synthesizer with

XTAL

/4096 Carrier-Frequency Spacing

♦ +10dBm Output Power into 50Ω Load

♦ Integrated TX/RX Switch

♦ Integrated Transmit and Receive PLL, VCO, and

Loop Filter

♦ > 45dB Image Rejection

♦ Typical RF Sensitivity*

ASK: -114dBm

FSK: -110dBm

♦ Selectable IF Bandwidth with External Filter

♦ RSSI Output with High Dynamic Range

♦ Autopolling Low-Power Management

♦ < 12.5mA Transmit-Mode Current

♦ < 6.7mA Receive-Mode Current

♦ < 23.5µA Polling-Mode Current

♦ < 800nA Shutdown Current

♦ Fast-On Startup Feature, < 250µs

♦ Small 32-Pin, Thin QFN Package

MAX7032

Low-Cost, Crystal-Based, Programmable,

ASK/FSK Transceiver with Fractional-N PLL

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-3685; Rev 2; 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.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

MAX7032ATJ+ -40°C to +125°C 32 Thin QFN-EP**

*0.2% BER, 4kbps Manchester-encoded data, 280kHz IF BW,

average RF power

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

EP = Exposed pad.

Pin Configuration, Typical Application Circuit, and

Functional Diagram appear at end of data sheet.

1 2 3 4 5 6 ... 31 32

Summary of Contents

Page 1 - Ordering Information

General DescriptionThe MAX7032 crystal-based, fractional-N transceiver isdesigned to transmit and receive ASK/OOK or FSKdata in the 300MHz to 450MHz f

Page 2 - DC ELECTRICAL CHARACTERISTICS

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL10 _____________________________________________________________

Page 3 - AC ELECTRICAL CHARACTERISTICS

MAX7032CLKOUT SPUR MAGNITUDE vs. SUPPLY VOLTAGEMAX7032 toc38SUPPLY VOLTAGE (V)CLKOUT SPUR MAGNITUDE (dBc)3.33.02.72.4-64-62-60-58-56-662.1 3.6fCLKOUT

Page 4

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL12 _____________________________________________________________

Page 5

Detailed DescriptionThe MAX7032 300MHz to 450MHz CMOS transceiverand a few external components provide a completetransmit and receive chain from the a

Page 6 - RECEIVER

MixerA unique feature of the MAX7032 is the integratedimage rejection of the mixer. This eliminates the needfor a costly front-end SAW filter for many

Page 7

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 8

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL16 _____________________________________________________________

Page 9

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 10 - TRANSMITTER

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL18 _____________________________________________________________

Page 11

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 12 - Pin Description

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL2 ______________________________________________________________

Page 13 - Pin Description (continued)

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL20 _____________________________________________________________

Page 14

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 15 - Typical Application Circuit

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL22 _____________________________________________________________

Page 16 - Transmitter

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 17 - Power-Supply Connections

Oscillator Frequency Register (Address 0x05)The MAX7032 has an internal frequency divider thatdivides down the crystal frequency to 100kHz. TheMAX7032

Page 18 - Table 2. Command Bits

The AGC dwell time is dependent on the crystal fre-quency and the bit settings of the AGC dwell timer. Tocalculate the dwell time, use the following e

Page 19 - Table 3. Register Summary

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL26 _____________________________________________________________

Page 20 - Figure 8. Data Input Diagram

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 21 - Calibration

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL28 _____________________________________________________________

Page 22

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 23

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 24 - Configuration

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL30 _____________________________________________________________

Page 25 - ) Configuration

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 26

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLLMaxim cannot assume responsibility for use of any circuitry othe

Page 27 - Applications Information

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL4 ______________________________________________________________

Page 28

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 29

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL6 ______________________________________________________________

Page 30 - Functional Diagram

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

Page 31 - Package Information

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL8 ______________________________________________________________

Page 32 - Revision History

MAX7032Low-Cost, Crystal-Based, Programmable,ASK/FSK Transceiver with Fractional-N PLL________________________________________________________________

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Design Filtration TXH-4 Specifications

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Summary of Contents

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