General Description

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.

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

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