MICRF033 Datasheet | Micrel Semiconductor

Description The MICRF003 is a single chip OOK (ON-OFF Keyed) Receiver IC for remote wireless applications, employing Micrel’s latest Qwik Radiotm technology. This device is a true “antenna-in, data-out” monolithic device. All RF and IF tuning is acplished automatically within the IC, which eliminates manual tuning, and reduces production costs. Receiver functions are pletely integrated. The result is a highly reliable yet extremely low cost solution for high volume wireless applications. Because the MICRF003 is a true single-chip radio receiver, it is extremely easy to apply, minimizing design and production costs, and improving time to market. The MICRF003 provides two fundamental modes of operation, FIXED and SWP. In FIXED mode, the device functions like a conventional Superheterodyne receiver, with an (internal) local oscillator fixed at a single frequency based on an external reference crystal or clock. As with any conventional superheterodyne receiver, the transmit frequency must be accurately controlled, generally with a crystal or SAW (Surface Acoustic Wave) resonator. In SWP mode, the MICRF003 sweeps the (internal) local oscillator at rates greater than the baseband data rate. This effectively “broadens” the RF bandwidth of the receiver to a value equivalent to conventional superregenerative receivers. Thus the MICRF003 can operate with less expensive LC transmitters without additional ponents or tuning, even though the receiver topology is still superheterodyne. In this mode the reference crystal can be replaced with a less expensive ± 0.5% ceramic resonator. The MICRF003 provides two additional key features : (1) a Shutdown Mode, which may be used for duty-cycle operation, and (2) a “Wakeup” function, which provides a logical indication of an ining RF signal. These features make the MICRF003 ideal for low and ultra-low power applications, such as RKE and RFID. All post-detection (demodulator) data filtering is provided on the MICRF003, so no external...