MAX7032ATJ+ Maxim Integrated Products, MAX7032ATJ+ Datasheet

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MAX7032ATJ+

Manufacturer Part Number
MAX7032ATJ+
Description
RF Transceiver IC TXRX ASK/FSK PROG MHz Crystal-Based, P
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX7032ATJ+

Number Of Receivers
1
Number Of Transmitters
1
Wireless Frequency
300 MHz to 450 MHz
Output Power
6.7 dBm
Operating Supply Voltage
2.7 V, 5 V
Maximum Operating Temperature
+ 125C
Mounting Style
SMD/SMT
Maximum Supply Current
12.5 mA
Minimum Operating Temperature
- 40 C
Modulation
ASK/OOK.FSK
Package / Case
TQFN-32 EP
Data Rate
33Kbps
Supply Voltage Range
2.1V To 3.6V, 4.5V To 5.5V
Logic Case Style
QFN
No. Of Pins
32
Operating Temperature Range
-40°C To +125°C
Filter Terminals
SMD
Rohs Compliant
Yes
Data Rate Max
66Kbps
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
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.
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.
2-Way Remote Keyless Entry
Security Systems
Home Automation
Remote Controls
Remote Sensing
Smoke Alarms
Garage Door Openers
Local Telemetry Systems
ASK/FSK Transceiver with Fractional-N PLL
XTAL
/4096. Retaining the fixed-N PLL for the
Low-Cost, Crystal-Based, Programmable,
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o +2.1V to +3.6V or +4.5V to +5.5V Single-Supply
o Single Crystal Transceiver
o User-Adjustable 300MHz to 450MHz Carrier
o ASK/OOK and FSK Modulation
o User-Adjustable FSK Frequency Deviation
o Agile Transmitter Frequency Synthesizer with
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*
o Selectable IF Bandwidth with External Filter
o RSSI Output with High Dynamic Range
o Autopolling Low-Power Management
o < 12.5mA Transmit-Mode Current
o < 6.7mA Receive-Mode Current
o < 23.5µA Polling-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,
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.
MAX7032ATJ+
Operation
Frequency
Through Fractional-N PLL Register
f
Loop Filter
XTAL
ASK: -114dBm
FSK: -110dBm
PART
/4096 Carrier-Frequency Spacing
-40°C to +125°C
TEMP RANGE
Ordering Information
PIN-PACKAGE
32 Thin QFN-EP**
Features
1

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MAX7032ATJ+ Summary of contents

Page 1

... Fast-On Startup Feature, < 250µs o Small 32-Pin, Thin QFN Package Applications *0.2% BER, 4kbps Manchester-encoded data, 280kHz IF BW, average RF power PART MAX7032ATJ+ + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Pin Configuration, Typical Application Circuit, and Functional Diagram appear at end of data sheet. Features ...

Page 2

Low-Cost, Crystal-Based, Programmable, ASK/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, CS, DIO, SCLK, CLKOUT to GND......................................................-0.3V to (HVIN + 0.3V) All Other Pins ...

Page 3

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL DC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , 50Ω system impedance -40°C to +125°C, unless otherwise noted. Typical values are otherwise noted.) (Note 1) PARAMETER ...

Page 4

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , 50Ω system impedance -40°C to +125°C, unless otherwise noted. Typical values are otherwise noted.) (Note 1) PARAMETER ...

Page 5

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , 50Ω system impedance -40°C to +125°C, unless otherwise noted. Typical values are otherwise noted.) (Note 1) PARAMETER ...

Page 6

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , 50Ω system impedance -40°C to +125°C, unless otherwise noted. Typical values are otherwise noted.) (Note 1) Note ...

Page 7

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL ( Typical Application Circuit , PAVDD = 4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.) DEEP-SLEEP CURRENT vs. TEMPERATURE 18 16 ...

Page 8

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL ( Typical Application Circuit , PAVDD = 4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.) FSK DEMODULATOR OUTPUT vs. IF FREQUENCY ...

Page 9

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL ( Typical Application Circuit , PAVDD = 4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.) PHASE NOISE vs. OFFSET FREQUENCY -50 ...

Page 10

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL ( Typical Application Circuit , PAVDD = 4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.) SUPPLY CURRENT AND OUTPUT POWER vs. ...

Page 11

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL ( Typical Application Circuit , PAVDD = 4kbps Manchester encoded, frequency deviation = ±50kHz, BER = 0.2% average RF power, unless otherwise noted.) EFFICIENCY vs. SUPPLY VOLTAGE 30 f ...

Page 12

Low-Cost, Crystal-Based, Programmable, ASK/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 rise and ...

Page 13

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL PIN NAME High-Voltage Supply Input. For 3V operation, connect HVIN to PAVDD, AVDD, and DVDD. For 5V 27 HVIN operation, connect only HVIN to 5V. Bypass HVIN to GND with 0.01µF and ...

Page 14

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL A unique feature of the MAX7032 is the integrated image rejection of the mixer. This eliminates the need for a costly front-end SAW filter for many applications. The advantage of not using ...

Page 15

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL The configuration shown in Figure 2 can create a Butterworth or Bessel response. The Butterworth filter offers a very flat amplitude response in the passband and a rolloff rate of 40dB/decade for ...

Page 16

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL MAX7032 PEAK DET DATA SLICER DATA PDMAX R C Figure 4. Generating Data Slicer Threshold Using the Peak Detectors The maximum and minimum peak detectors can be used together to form a ...

Page 17

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL The MAX7032 features an internal envelope-shaping resistor, which connects between the open-drain output of the PA and the power supply (see the Typical Application Circuit ). The envelope-shaping resistor slows the turn-on/turn-off ...

Page 18

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Crystal Oscillator (XTAL) The XTAL oscillator in the MAX7032 is designed to pre- sent a capacitance of approximately 3pF between the XTAL1 and XTAL2 pins. In most cases, this corre- sponds to ...

Page 19

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 3. Register Summary REGISTER A[5:0] REGISTER NAME 0x00 Power configuration 0x01 Control 0x02 Configuration0 0x03 Configuration1 0x05 Oscillator frequency 0x06 Off timer—t 0x07 Off timer—t 0x08 CPU recovery timer—t RF settling ...

Page 20

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL CS SCLK DIO COMMAND Figure 8. Data Input Diagram CS SCLK DIO ADDRESS READ COMMAND CS SCLK DIO ...

Page 21

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 4. Register Configuration NAME (ADDRESS) D7 POWER[7:0] (0x00) LNA CONTRL[7:0] (0x01) AGCLK CONF0[7:0] (0x02) MODE CONF1[7:0] (0x03) X OSC[7:0] (0x05) OSC7 t [15:8] (0x06 OFF OFF t [7:0] (0x07) ...

Page 22

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 5. Power-Configuration Register (Address: 0x00) BIT ID BIT NAME LNA LNA enable AGC AGC enable MIXER Mixer enable BaseB Baseband enable PkDet Peak-detector enable PA Transmitter PA enable RSSIO RSSI amplifier ...

Page 23

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 7. Configuration 0 Register (Address: 0x02) BIT ID BIT NAME MODE FSK or ASK modulation T/R Transmit or receive MGAIN Manual gain mode Discontinuous receive DRX mode OFPS1 Off-timer prescaler OFPS0 ...

Page 24

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 9. Status Register (Read Only) (Address: 0x1A) BIT ID BIT NAME LCKD Lock detect GAINS AGC gain state CLKON Clock/crystal alive X None X None X None Polling timer calibration PCALD ...

Page 25

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL The AGC dwell time is dependent on the crystal fre- quency and the bit settings of the AGC dwell timer. To calculate the dwell time, use the following equation ...

Page 26

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL CS DIO t OFF t CPU ASK_DATA OR FSK_DATA Figure 10. DRX Mode Sequence of the MAX7032 Set OFPS1 and OFPS0 That ...

Page 27

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 15. On-Timer (t ) Configuration ON ONPS1 ONPS0 The on timer, t (see Figure 10 16-bit timer that ON is configured ...

Page 28

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Keeping the traces short also reduces parasitic induc- tance. Generally, 1in of PCB trace adds about 20nH of parasitic inductance. The parasitic inductance can have a dramatic effect on the effective inductance ...

Page 29

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Table 16. Component Values for Typical Application Circuit COMPONENT C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 ...

Page 30

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL LNAOUT MIXIN LNAIN LNA LNASRC 8 XTAL1 31 CRYSTAL OSCILLATOR XTAL2 32 CLKOUT 25 1/K 3.0V HVIN 27 REGULATOR AVDD 6 EXPOSED PAD 2 ROUT 30 ______________________________________________________________________________________ MIXIN- MIXOUT ...

Page 31

Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL Pin Configuration TOP VIEW CLKOUT 25 DVDD 26 27 HVIN CS 28 MAX7032 29 DIO SCLK 30 XTAL1 31 XTAL2 ...

Page 32

... 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. 32 ____________________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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