TDA9821
Overview
- Two alignment-free PLL FM demodulators
- Automatic second sound carrier mute
- Mono and dual channel application
- Low power consumption
- Few external components required. QUICK REFERENCE DATA SYMBOL VP IP IM Vi(rms) Vo(rms) S+N N α8/7 RR Tamb PARAMETER supply voltage (pin 14) supply current (pin 14) AC peak current (pins 7 and 8) input signal (RMS value) S+N = 40 dB N in accordance with “CCIR 468-3” f = 50 to 12500 Hz VRR < 200 mV; f = 70 Hz CONDITIONS MIN. 4.5 23 - - 0.4 64 60 16 0 TYP. 5.0 30 - 150 0.5 68 70 20 - GENERAL DESCRIPTION TDA9821 The TDA9821 is a monolithic, integrated, TV FM intercarrier sound demodulator for all FM standards. The circuit contains two separate FM demodulators using Phase Locked Loop (PLL) reference frequency generation. The circuit requires a minimum number of external components. MAX. 8.8 37 1.5 250 0.6 - - - 70 UNIT V mA mA µV V dB dB dB °C output signal (pins 7 and 8; RMS value) ∆fi = ±50 kHz signal plus noise-to-noise ratio (pins 7 and 8) crosstalk attenuation supply voltage ripple rejection (pins 7 and 8) operating ambient temperature
