AN8946SB - Panasonic Semiconductor

AN8946SB FM demodulation

Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Description Key pulse input AFC output L AFC output H VCC2 (VCO, AFC system) VCO1 GND3 (VCO system) VCO2 GND2 (Main) Loop amp. output Video amp. input Video amp. output Free-run frequency adjustment Loop amp. input 1 Loop amp. input 2 Pin No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Description AFC adjustment AGC ou.

Features

PLL
· FM demodulation, 2nd IF AGC amp., AGC detection and AFC (applicable to both mean value and keyed types). 1 28 0.3±0.1 Unit : mm s Features
• 5 V single power source
• Low power dissipation (typ. 170 mW)
• S/N 65 dB or more
• Inter-modulation interference ratio: 50 dB or more
• AGC amp built in (Reduction range: 55 dB)
• Adjustment-free VCO coil 14 0.1±0.1 15 (0.4) 7.2±0.3 9.3±0.3 s Applications
• BS/CS tuner, television SSOP028-P-0375A s Block Diagram 21 VCC 5V 20 Reg. out 28 27 26 25 24 23 22 GND 2.6 V 19 18 17 16 AFC amp. AGC amp. IF amp. DC amp. DC amp. Key .