General Description
The SYN470R is a single chip ASK/OOK (ON-OFF Keyed) RF receiver IC. This device is a true “antenna-in to data-out” monolithic device. All RF and IF tuning are accomplished automatically within the IC which eliminates manual tuning and reduces production costs. The result is a highly reliable yet low cost solution.
The SYN470R is a fully featured part in 16-pin packaging, the SYN480R is the same part packaged in 8-pin packaging with a reduced feature set.
The SYN470R provides two additional functions, (1) a Shutdown pin, which may be used to turn the device off for duty-cycled operation, and (2) a “Wake-up” output, which provides an output flag indicating when an RF signal is present. These features make the SYN470R ideal for low and ultra-low power applications, such as RKE and remote controls.
All IF filtering and post-detection (demodulator) data filtering is provided within the SYN470R, so no external filters are necessary. One of four demodulator filter bandwidths may be selected externally by the user.
The SYN470R offer two modes of operation; fixed-mode (FIX) and sweep-mode (SWP). In fixed mode the SYN470R functions as a conventional super-heterodyne receiver. In sweep mode the SYN470R sweeps a wider RF spectrum. Fixed-mode provides better selectivity and sensitivity performance and sweep mode enables the SYN470R to be used with low cost, imprecise transmitters.