Analog Devices MAX1471 Product Info

• 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
• AEC-Q100 Qualified (MAX1471ATJ/V+ Only)

The MAX1471 low-power, CMOS, superheterodyne, RF dual-channel receiver is designed to receive both amplitude-shift-keyed (ASK) and frequency-shift-keyed (FSK) data without reconfiguring the device or introducing any time delay normally associated with changing modulation schemes. The MAX1471 requires few external components 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)
• Garage Door Openers
• Home Automation
• Local Telemetry Systems
• Medical Systems
• Security Systems
• Tire-Pressure Monitoring Systems
• Wireless Keys
• Wireless Sensors