MAX7032 19-3685 Rev 2 11/10 Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL General Description Features The MAX7032 crystal-based, fractional-N transceiver is +2.1V to +3.6V or +4.5V to +5.5V Single-Supply designed to transmit and receive ASK/OOK or FSK Operation data in the 300MHz to 450MHz frequency range with Single Crystal Transceiver data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded). This device generates a typi- User-Adjustable 300MHz to 450MHz Carrier cal output power of +10dBm into a 50 load, and Frequency exhibits typical sensitivities of -114dBm for ASK data ASK/OOK and FSK Modulation and -110dBm for FSK data. The MAX7032 features sep- arate transmit and receive pins (PAOUT and LNAIN) User-Adjustable FSK Frequency Deviation and provides an internal RF switch that can be used to Through Fractional-N PLL Register connect the transmit and receive pins to a common Agile Transmitter Frequency Synthesizer with antenna. f /4096 Carrier-Frequency Spacing XTAL The MAX7032 transmit frequency is generated by a 16- bit, fractional-N, phase-locked loop (PLL), while the +10dBm Output Power into 50 Load receivers local oscillator (LO) is generated by an inte- Integrated TX/RX Switch ger-N PLL. This hybrid architecture eliminates the need for separate transmit and receive crystal reference Integrated Transmit and Receive PLL, VCO, and oscillators because the fractional-N PLL allows the Loop Filter transmit frequency to be set within 2kHz of the receive > 45dB Image Rejection frequency. The 12-bit resolution of the fractional-N PLL allows frequency multiplication of the crystal frequency Typical RF Sensitivity* in steps of f /4096. Retaining the fixed-N PLL for the XTAL ASK: -114dBm receiver avoids the higher current drain requirements of FSK: -110dBm a fractional-N PLL and keeps the receiver current drain Selectable IF Bandwidth with External Filter as low as possible. RSSI Output with High Dynamic Range The fractional-N architecture of the MAX7032 transmit PLL allows the transmit FSK signal to be programmed for Autopolling Low-Power Management exact frequency deviations, and completely eliminates < 12.5mA Transmit-Mode Current the problems associated with oscillator-pulling FSK sig- nal generation. All frequency-generation components are < 6.7mA Receive-Mode Current integrated on-chip, and only a crystal, a 10.7MHz IF filter, < 23.5A Polling-Mode Current and a few discrete components are required to imple- ment a complete antenna/digital data solution. < 800nA Shutdown Current The MAX7032 is available in a small 5mm x 5mm, 32-pin, Fast-On Startup Feature, < 250s thin QFN package, and is specified to operate in the automotive -40C to +125C temperature range. Small 32-Pin, Thin QFN Package Applications 2-Way Remote Keyless Entry *0.2% BER, 4kbps Manchester-encoded data, 280kHz IF BW, Security Systems average RF power Home Automation Ordering Information Remote Controls PART TEMP RANGE PIN-PACKAGE Remote Sensing MAX7032ATJ+ -40C to +125C 32 Thin QFN-EP** Smoke Alarms +Denotes a lead(Pb)-free/RoHS-compliant package. Garage Door Openers **EP = Exposed pad. Local Telemetry Systems Pin Configuration, Typical Application Circuit, and Functional Diagram appear at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Low-Cost, Crystal-Based, Programmable, ASK/FSK Transceiver with Fractional-N PLL ABSOLUTE MAXIMUM RATINGS HVIN to GND .........................................................-0.3V to +6.0V Continuous Power Dissipation (T = +70C) A PAVDD, AVDD, DVDD to GND..............................-0.3V to +4.0V 32-Pin Thin QFN (derate 21.3mW/C above +70C)....1702mW ENABLE, T/R, DATA, CS, DIO, SCLK, CLKOUT to Operating Temperature Range .........................-40C to +125C GND......................................................-0.3V to (HVIN + 0.3V) Storage Temperature Range .............................-65C to +150C All Other Pins to GND...............................-0.3V to ( V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD Soldering Temperature (reflow) .......................................+260C 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. DC ELECTRICAL CHARACTERISTICS (Typical Application Circuit, 50 system impedance, V = V = V = V = +2.1V to +3.6V, f = 300MHz to 450MHz, AVDD DVDD PAVDD HVIN RF T = -40C to +125C, unless otherwise noted. Typical values are at V = V = V = V = +2.7V, T = +25C, unless A AVDD DVDD PAVDD HVIN A otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS HVIN, PAVDD, AVDD, and DVDD connected to Supply Voltage (3V Mode) V 2.1 2.7 3.6 V DD power supply PAVDD, AVDD, and DVDD unconnected from Supply Voltage (5V Mode) HVIN 4.5 5.0 5.5 V HVIN, but connected together Transmit mode, PA off, 3.5 5.4 f = 315MHz RF V at 0% duty cycle DATA 4.3 6.7 f = 434MHz (ASK) (Note 2) RF Transmit mode, V 7.6 12.3 DATA f = 315MHz RF mA at 50% duty cycle 8.4 13.6 f = 434MHz (ASK) (Notes 3, 4) RF Transmit mode, V 11.6 19.1 DATA f = 315MHz (Note 4) RF at 100% duty cycle 12.4 20.4 f = 434MHz (Note 2) RF (FSK) 6.1 7.9 Receiver (ASK 315MHz) Receiver (ASK 434MHz) 6.4 8.3 mA Receiver (FSK 315MHz) 6.4 8.4 T < +85C, A Receiver (FSK 434MHz) 6.7 8.7 Supply Current I DD typ at +25C DRX (3V mode) 23.4 77.3 (Note 4) DRX (5V mode) 67.2 94.4 A Deep-sleep (3V mode) 0.8 8.8 Deep-sleep (5V mode) 2.4 10.9 6.4 8.2 Receiver (ASK 315MHz) Receiver (ASK 434MHz) 6.7 8.4 mA Receiver (FSK 315MHz) 6.8 8.7 T < +125C, A Receiver (FSK 434MHz) 7.0 8.8 typ at +125C DRX (3V mode) 33.5 103.0 (Note 2) DRX (5V mode) 82.3 116.1 A Deep-sleep (3V mode) 8.0 34.2 Deep-sleep (5V mode) 14.9 39.3 Voltage Regulator V V = 5V, I = 15mA 3.0 V REG HVIN LOAD 2 MAX7032