TDA9809M

General description

The TDA9809M is an integrated circuit for single standard vision IF signal processing, FM demodulation and FM radio demodulation in multimedia sets.

Features

• 5 V supply voltage
• Applicable at Intermediate Frequencies (IFs) of 38.9 and 45.75 MHz
• Gain controlled wideband Video IF (VIF) amplifier (AC-coupled)
• True synchronous demodulation with active carrier regeneration (very linear demodulation, good intermodulation figures, reduced harmonics, excellent pulse response)
• Robustness for over-modulation better than 105% due to PLL bandwidth control for negative modulation standards
• VIF AGC (Automatic Gain Control) detector for gain control, operating as peak sync detector for negative modulation standards
• Tuner AGC with adjustable TakeOver Point (TOP)
• AFC (Automatic Frequency Control) detector without extra reference circuit
• AC-coupled limiting amplifier for sound intercarrier signal
• Alignment-free FM PLL (Phase-Locked Loop) demodulator with high linearity; integrated de-emphasis resistor
• Integrated level detector
• Alignment-free FM radio AFC detector with external resonator
• RIF (Radio IF) amplifier for 10.7 MHz
• Stabilizer circuit for ripple rejection and to achieve constant output signals
• ESD (Electrostatic Discharge) protection for all pins.

Applications

• Low power switched-mode power supplies
• Rectification
• Polarity protection.

Block diagrams/pinning

Technical documents

Application Notes

AN97047_1; DVB-IF downconverter for set top boxes with AGC and VIF/SIF-demodulator: TDA9819 (09-Dec-97)

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