General Description

The MICRF218 is a 3.0V to 3.6V, 300MHz to 450MHz ASK/OOK super-heterodyne receiver with user selectable Intermediate Frequency (IF) Bandwidths of 550kHz or 1500kHz at 433.92MHz, making it an excellent solution for use with low-cost SAW-based transmitters or transmitters which use low-cost, medium grade (~30ppm) crystals. The device requires a single, low-cost crystal to select the proper RF frequency, integrated Automatic Gain Control (AGC), data slicer, and programmable baseband filter bandwidths of 1.6kHz to 13kHz allowing the device to support bit-rates up to 20kbps at 433.92MHz.

Features

• Fully integrated 300 to 450MHz ASK/OOK Receiver

• No external IF Filter Required

• Wide IF-Bandwidth filter supports reception of SAW based and medium-grade (~30ppm) transmitter

• Sensitivity at 433.92MHz at 1kbps with 0.1 BER

o -108dBm sensitivity with 550kHz IF Bandwidth

o -106dBm sensitivity with 1500kHz IF Bandwidth

• Low-Supply Current

o 4.0mA at 315MHz

o 5.5mA at 433.92MHz

o 1µA low-power shutdown mode

• Data Rates to 10 kbps (Manchester Encoded) @ 433.92 MHz

• Duty Cycling Capable > 100:1 (shut down mode)

• 60dB Analog Received Signal Strength Indicator

• 16-pin QSOP (4.9mm x 6.0mm) package