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MAX1471 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1471 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 26 page General Description The MAX1471 low-power, CMOS, superheterodyne, RF dual-channel receiver is designed to receive both ampli- tude-shift-keyed (ASK) and frequency-shift-keyed (FSK) data without reconfiguring the device or introducing any time delay normally associated with changing modula- tion schemes. The MAX1471 requires few external com- ponents to realize a complete wireless RF digital data receiver for the 300MHz to 450MHz ISM bands. The MAX1471 includes all the active components required in a superheterodyne receiver including: a low- noise amplifier (LNA), an image-reject (IR) mixer, a fully integrated phase-locked loop (PLL), local oscillator (LO), 10.7MHz IF limiting amplifier with received-signal- strength indicator (RSSI), low-noise FM demodulator, and a 3V voltage regulator. Differential peak-detecting data demodulators are included for both the FSK and ASK analog baseband data recovery. The MAX1471 includes a discontinuous receive (DRX) mode for low- power operation, which is configured through a serial interface bus. The MAX1471 is available in a 32-pin thin QFN package and is specified over the automotive -40°C to +125°C temperature range. Applications Automotive Remote Keyless Entry (RKE) Tire Pressure Monitoring Systems Garage Door Openers Wireless Sensors Wireless Keys Security Systems Medical Systems Home Automation Local Telemetry Systems Features ♦ ASK and FSK Demodulated Data on Separate Outputs ♦ Specified over Automotive -40°C to +125°C Temperature Range ♦ Low Operating Supply Voltage Down to 2.4V ♦ On-Chip 3V Regulator for 5V Operation ♦ Low Operating Supply Current 7mA Continuous Receive Mode 1.1µA Deep-Sleep Mode ♦ Discontinuous Receive (DRX) Low-Power Management ♦ Fast-On Startup Feature < 250µs ♦ Integrated PLL, VCO, and Loop Filter ♦ 45dB Integrated Image Rejection ♦ RF Input Sensitivity* ASK: -114dBm FSK: -108dBm ♦ Selectable IF BW with External Filter ♦ Programmable Through Serial User Interface ♦ RSSI Output and High Dynamic Range with AGC 315MHz/434MHz Low-Power, 3V/5V ASK/FSK Superheterodyne Receiver ________________________________________________________________ Maxim Integrated Products 1 32 31 30 29 28 27 26 9 101112131415 18 19 20 21 22 23 24 7 6 5 4 3 2 1 MAX1471 THIN QFN TOP VIEW DSA+ DSA- OPA+ DFA XTAL2 XTAL1 AVDD 8 LNAIN 25 DVDD DGND DFF OPF+ DSF+ DSF- PDMAXF 17 PDMINF 16 Pin Configuration 19-3272; Rev 1; 3/05 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. *0.2% BER, 4kbps, Manchester-encoded data, 280kHz IF BW Ordering Information PART TEMP RANGE PIN-PACKAGE MAX1471ATJ -40 °C to +125°C 32 Thin QFN-EP** **EP = Exposed pad. |
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