KESRX01

KESRX01 290 - 460MHz ASK Receiver Advance Information DS3968 5.0 March1998 The KESRX01 is a single chip ASK (Amplitude Shift Key) Receiver IC. It is designed to operate in a variety of low power radio applications including keyless entry, general domestic and industrial remote control, RF tagging and local paging systems. This single conversion super–heterodyne receiver offers an exceptionally high level of integration and performance. The unique architecture enables data rates up to 50Kbits/sec to be supported. All low power radio regulations, including ETSI–ETS 300 220, and FCC, part 15, can easily be met. Local oscillator generation is performed by an on–chip PLL which uses an external crystal reference oscillator (4.5 to 7.2MHz). All popular radio frequencies (315MHz, 433.92MHz, etc) can then be supported by simply choosing the appropriate crystal frequency. Particular emphasis has been placed on low current consumption, with pulsed ON/OFF operation allowing <1mA average current consumption to be achieved. The on–chip VCO and IF significantly minimise the external components needed thus reducing any re–radiation effects. IFDC1 IFDC2 IF2 IF1 VCC MIXIP RFOP VEERF RFIN DSN DATAOP PEAK 1 2 3 24 23 22 21 20 19 18 17 16 15 14 13 XTAL2 XTAL1 DF2 DF1 DF0 LF NC NC VCO2 VCO1 PD VEE1 5 6 7 8 9 10 11 12 KESRX01 4 QP24 QPA24 Fig. 1 Pin connections - top view FEATURES s Very low supply current (2.30mA typical) s Low external part count s –105dBm sensitivity (typical 315MHz) s...