TK14551V

TK14551V FM IF DETECTOR/AMPLIFIER FEATURES s IF Input Frequency ~90 MHz (TYP) s Balanced Input (IF) s Includes Dual High Speed RSSI Outputs. One is for ASK demodulation, another one is for carrier sensing. s RSSI outputs are accurate with stable temperature characteristic and include buffer amplifiers. s High Speed RSSI Comparator for Carrier Sensing s HIgh Speed Data Comparator (~2 Mbps) s Wide Band Demodulator (~1 MHz) s Battery Save Function s Low Voltage Operation: 3.0 ~ 5.5 V s Very Small Package (TSSOP-24) APPLICATIONS s s s s Wide Band FSK Demodulation Wide Band FM Demodulation Video Signal Demodulation Wide Band ASK Demodulation TK14551 IF DECOUPLE IF INPUT (-) 23 IF INPUT (+) 22 IF GND 21 BATTERY SAVE 20 RSSI COMP BIAS 19 RSSI OUTPUT-1 18 RSSI OUTPUT-2 17 RSSI BUFFERED OUTPUT-1 16 RSSI COMP OUTPUT 15 RSSI COMP GND 14 DATA COMP GND 13 DATA COMP OUTPUT DESCRIPTION The TK14551V is a wide band IF IC capable of operating up to 90 MHz. It includes an FM demodulator, RSSI, RSSI comparator and data comparator. These functions can perform high-speed operations. The TK14551V has a unique function that allows establishing the demodulation characteristics by changing the external RC time constant, and not changing the phase shifter constant. The RSSI output is individually trimmed, resulting in excellent accuracy, good linearity, and stable temperature characteristics. Because the TK14551V includes a dual high-speed RSSI output, it is possible to demodulate AM simply and to s...