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MAX1479ATE+ Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX1479ATE+ Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 10 page 300MHz to 450MHz Low-Power, Crystal-Based +10dBm ASK/FSK Transmitter _______________________________________________________________________________________ 3 Note 1: Supply current, output power, and efficiency are greatly dependent on board layout and PAOUT match. Note 2: 100% tested at TA = +125°C. Guaranteed by design and characterization over temperature. Note 3: 50% duty cycle at 10kHz ASK data (Manchester coded). Note 4: Guaranteed by design and characterization, not production tested. Note 5: VENABLE = VIL to VENABLE = VIH. fOFFSET is defined as the frequency deviation from the desired carrier frequency. Note 6: Dependent on crystal and PCB trace capacitance. Note 7: VENABLE > VIH, VDATA > VIH, Efficiency = POUT/(VDD x IDD). Note 8: Dependent on PCB trace capacitance. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SYSTEM PERFORMANCE Frequency Range fRF (Note 2) 300 450 MHz Settle to within 50kHz 200 Turn-On Time (Note 5) tON Settle to within 5kHz 350 µs ASK mode (Manchester coded) 100 Maximum Data Rate (Note 4) FSK mode (Manchester coded) 20 kbps fRF = 315MHz 55 Maximum FSK Frequency Deviation DEV[2:0] = 111 (Note 6) fRF = 433MHz 80 kHz TA = +25°C, VDD = +2.7V 6.8 10 12.0 TA = +125°C, VDD = +2.1V 2.7 5.3 Output Power (Note 2) POUT TA = -40°C, VDD = +3.6V 12.2 16.1 dBm fRF = 315MHz 35 Transmit Efficiency with CW Tone (Note 7) fRF = 433MHz 34 % fRF = 315MHz 27 Transmit Efficiency at 50% Duty Cycle fRF = 433MHz 25 % PHASE-LOCKED-LOOP PERFORMANCE VCO Gain KVCO 280 MHz/V fOFFSET = 100kHz -75 fRF = 315MHz fOFFSET = 1MHz -98 fOFFSET = 100kHz -74 Phase Noise fRF = 433MHz fOFFSET = 1MHz -98 dBc/Hz fRF = 315MHz -50 Maximum Carrier Harmonics fRF = 433MHz -45 dBc Reference Spur -40 dBc Loop Bandwidth BW 300 kHz Crystal Frequency Range fXTAL FRF / 32 MHz Crystal Tolerance 50 ppm Crystal Load Capacitance CLOAD (Note 8) 4.5 pF Clock Output Frequency Determined by CLK0 and CLK1; see Table 1 FXTAL/N MHz AC ELECTRICAL CHARACTERISTICS ( Typical Application Circuit, all RF inputs and outputs are referenced to 50 Ω, VDD = +2.1V to +3.6V, VENABLE = VDD, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VDD = +2.7V, TA = +25°C, unless otherwise noted.) (Note 1) |
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