GENERAL DESCRIPTION
All RF and IF tuning is accomplished automatically within the IC, which eliminates manual tuning, and reduces production costs. The MICRF007 is a conventional superhetrodyne receiver, with an (internal) Local oscillator fixed at a single frequency based on an external reference crystal or clock. As with any conventional superhetrodyne receiver, the companion transmitter’s frequency must be accurately controlled, generally with a crystal or SAW (surface acoustic wave) resonator. The MICRF007 provides two enhancements over the MICRF001/011: (1) a Shutdown Mode, which may be used for duty-cycle operation, and (2) reduced current consumption. The MICRF007 requires a mere 2.3mA at 315MHz (3.8mA at 433.92MHz) when fully operational. These features make the MICRF007 ideal for low and ultra-low power applications, such as RKE and RFID. All post-detection (demodulator) data filtering is provided on the MICRF007, so no external baseband filters are required. The demodulator filter bandwidth is fixed at 2.5kHz.
Micrel
