TDA9818T/V1,118

Video Processing Overview

The TDA9818T is a multistandard integrated circuit for vision IF signal processing, sound AM and FM demodulation. It operates on a 5 V supply with typical current of 90 mA. It supports intermediate frequencies of 38.9, 45.75, and 58.75 MHz. The device features a gain-controlled wideband video IF amplifier, true synchronous demodulation with active carrier regeneration, and an AC-coupled limiter amplifier for the sound intercarrier signal. It includes an alignment-free FM Phase-Locked Loop (PLL) demodulator, a single reference Quasi Split Sound (QSS) mixer, and an AM demodulator. The composite video output provides 1.1 V peak-to-peak.

Video Processing Feature Summary

• Multistandard vision IF signal processing with true synchronous demodulation and active carrier regeneration
• Integrated FM-PLL demodulator and single reference QSS mixer for high-performance sound processing
• Built-in AM demodulator and sound IF amplifier with automatic gain control
• Robust over-modulation handling via gated phase detector and PLL-bandwidth control

Video Processing Applications

• Single standard vision IF signal processing
• Multistandard TV receiver sound and vision demodulation
• Quasi Split Sound (QSS) mode applications
• Intercarrier sound processing systems

Video Processing Procurement Notes

Verify the specific package variant against the datasheet ordering information. The TDA9818T utilizes an SO24 plastic small outline package. Confirm that the application design accounts for the 5 V supply voltage requirement and the thermal resistance characteristics associated with this package type to ensure reliable operation within the specified ambient temperature range.

Video Processing Selection Notes

Select the TDA9818T when multistandard support including AM and FM demodulation is required alongside vision IF processing. This component is suitable for designs utilizing intermediate frequencies of 38.9, 45.75, or 58.75 MHz. It offers a comprehensive solution for integrating video demodulation, audio processing, and tuner AGC control in a single integrated circuit.

Video Processing Part Context

The TDA9818T belongs to the TDA9817/TDA9818 family of single/multistandard VIF/SIF-PLL and FM-PLL/AM demodulators manufactured by NXP USA Inc. (formerly Philips Semiconductors). While the TDA9817 handles single standard vision IF processing, the TDA9818 expands functionality to include multistandard vision IF processing along with dedicated sound AM and FM demodulation capabilities.

Video Processing Replacement Considerations

The TDA9818TS is the SSOP24 shrink small outline package equivalent of the TDA9818T. Both share identical electrical specifications and pin configurations but differ in physical package dimensions.