EVALUATION KIT AVAILABLE MAX1479 300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter General Description Features The MAX1479 crystal-referenced phase-locked-loop ETSI-Compliant EN300 220 (PLL) VHF/UHF transmitter is designed to transmit ASK, +2.1V to +3.6V Single-Supply Operation OOK, and FSK data in the 300MHz to 450MHz frequency Supports ASK, OOK, and FSK Modulations range. The MAX1479 supports data rates up to 100kbps in ASK mode and 20kbps in FSK mode (both Manchester Adjustable FSK Shift coded). The device provides an adjustable output power +10dBm Output Power into 50 Load of more than +10dBm into a 50 load. The crystal-based Low Supply Current (6.7mA in ASK Mode, architecture of the MAX1479 eliminates many of the com- and 10.5mA in FSK Mode) mon problems of SAW-based transmitters by providing Uses Small Low-Cost Crystal greater modulation depth, faster frequency settling, higher tolerance of the transmit frequency, and reduced tem- Small 16-Pin TQFN Package perature dependence. These improvements enable better Fast-On Oscillator200s Startup Time overall receiver performance when using the MAX1479 Programmable Clock Output together with a superheterodyne receiver such as the MAX1470, MAX1471, MAX1473, or MAX7033. The MAX1479 is available in a 16-pin TQFN package (3mm x 3mm) and is specified for the automotive tem- Ordering Information perature range from -40C to +125C. PART TEMP RANGE PIN-PACKAGE Applications MAX1479ATE+ -40C to +125C 16 TQFN-EP* Remote Keyless Entry +Denotes a lead(Pb)-free/RoHS-compliant package. Tire Pressure Monitoring *EP = Exposed pad. Security Systems Radio-Controlled Toys Wireless Game Consoles Typical Application Circuit appears at end of data sheet. Wireless Computer Peripherals Wireless Sensors RF Remote Controls Garage Door Openers Pin Configuration Functional Diagram TOP VIEW 16 15 14 13 16 15 14 13 CRYSTAL V 1 DEVIATION 12 DEV1 DD DRIVER V 1 12 DEV1 DD LOOP PD/CP MAX1479 MODE 2 11 DEV0 FILTER 2 11 MODE DEV0 DIN 3 10 CLK1 EP* ASK DIVIDE VCO FSK BY 32 ENABLE 4 9 CLK0 3 10 CLK1 DIN 5 6 7 8 MAX1479 PA CLOCK ENVELOPE 4 9 ENABLE DIVIDER SHAPING CLK0 TQFN 5 6 7 8 (3mm x 3mm) *CONNECT EP TO GND. 19-3353 Rev 2 2/15 GND CLKOUT V PA DD XTAL2 XTAL1 ROUT DEV2 PAOUT CLKOUT GND V PA XTAL2 DD ROUT XTAL1 DEV2 PAOUTMAX1479 300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter Absolute Maximum Ratings V to GND ............................................................-0.3V to +4V Operating Temperature Range ......................... -40C to +125C DD All Other Pins to GND .............................. -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C DD Continuous Power Dissipation (T = +70C) Storage Temperature Range ............................ -60C to +150C A 16-Pin TQFN (derate 14.7mW/C above +70C) ...1176.5mW Lead Temperature (soldering, 10s) .................................+300C 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, all RF inputs and outputs are referenced to 50, V = 2.1V to 3.6V, V = V . T = -40C to DD ENABLE DD A +125C, unless otherwise noted. Min and Max values are 100% tested at T = +125C and are guaranteed by design and character- A ization over temperature, unless otherwise noted. Typical values are at V = +2.7V, T = +25C, unless otherwise noted.) (Note 1) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 2.1 3.6 V DD f = 315MHz 2.9 4.3 PA off, V at RF DIN 0% duty cycle (ASK or FSK) f = 433MHz 3.3 4.8 RF f = 315MHz 6.7 10.7 Supply Current I V at 50% RF mA DD DIN duty cycle (ASK) (Notes 2, 3) f = 433MHz 7.3 11.4 RF f = 315MHz 10.5 17.1 V at 100% RF DIN duty cycle (FSK) f = 433MHz (Note 3) 11.4 18.1 RF T = +25C 0.2 A Standby Current I V < V T < +85C (Note 3) 120 300 nA STDBY ENABLE IL A T < +125C 700 1600 A DIGITAL INPUTS AND OUTPUTS V - DD Data Input High V V IH 0.25 Data Input Low V 0.25 V IL Maximum Input Current I 20 A IN V - DD Output Voltage High V CLKOUT, load = 10k 10pF (Note 3) V OH 0.25 Output Voltage Low V CLKOUT, load = 10k 10pF (Note 3) 0.25 V OL Maxim Integrated 2 www.maximintegrated.com