ADAV4622BSTZ

Overview

The ADAV4622BSTZ is an enhanced audio processor designed for advanced television applications, supporting digital and analog baseband audio alongside multistandard broadcast sound IF (SIF) demodulation. It features a fully programmable 28-bit audio processor with default TV audio flows, including matrix switching, automatic volume control, dynamic bass, and up to 200 ms stereo delay. The device integrates high-performance 24-bit ADCs and DACs with 95 dB and 94 dB dynamic range, respectively. It includes dual headphone outputs, PWM digital outputs for amplifiers, and four stereo I2S input channels with integrated sample rate converters supporting rates from 5 kHz to 50 kHz.

Feature Summary

• Multistandard SIF demodulator and stereo decoder supporting NICAM, A2, BTSC, and EIAJ formats
• High-performance 24-bit ADC (95 dB DNR) and DAC (94 dB DNR) using continuous-time Σ-Δ architecture
• Integrated sample rate converters (SRC) handling arbitrary input rates from 5 kHz to 50 kHz
• Up to 200 ms adjustable digital delay line for audio/video synchronization

Applications

• General-purpose consumer audio postprocessing
• Home theater in a box (HTIB) systems and DVD receivers
• Audio processing subsystems for DTV-ready TVs
• Analog broadcast capability for internet-connected TVs (iDTVs)

Procurement Notes

Verify the package type matches the required 80-lead LQFP form factor. Confirm that the operating temperature range of -40°C to +85°C aligns with the target environment. Ensure power supply requirements for AVDD (3.3 V), DVDD (1.8 V), and ODVDD (3.3 V) are correctly implemented in the design.

Selection Notes

Select this component when multistandard broadcast SIF demodulation is required alongside flexible digital audio routing. The built-in SRCs simplify clock domain crossing between different audio sources. Use SigmaStudio™ software for customizing audio flows if default TV settings are insufficient for specific branding or algorithmic needs.

Part Context

The ADAV4622 belongs to Analog Devices' SigmaDSP® family, targeting the consumer electronics market. It serves as a central audio hub for televisions and home theater systems, combining analog front-end processing with digital signal capabilities. The BSTZ suffix indicates the specific 80-lead LQFP package variant available for surface-mount assembly.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.