SAA7826HL/E/M1A,55

Encoders, Decoders, Converters Overview

The SAA7826HL/E/M1A is a Philips/NXP CD audio decoder IC combining the SAA732X decoder with TZA102X pre-amp and laser control functions. It operates at 1x, 2x, and 4x speeds using an internal PLL and 8.4672 MHz crystal. Key parameters include digital supply voltage (VDDD) of 1.8 V typical (1.65–1.95 V) and analog supply (VDDA) of 3.3 V typical (3.0–3.6 V). The onboard DAC delivers 90 dB A-weighted SNR and -80 dB THD+N. It features six oversampling bitstream ADCs for LF signals, adaptive HF data slicing, DC offset cancellation, and integrated laser power control up to 120 mA. Packaged in LQFP-80.

Encoders, Decoders, Converters Feature Summary

• Integrates CD audio decoding, digital servo, filterless DAC, pre-amplifier, and laser control to reduce external component count.
• Supports 1x, 2x, and 4x playback speeds with lock-to-disc mode for electronic shock absorption.
• Includes on-chip laser power control with soft-start capability and monitor feedback circuitry.
• Features EBU mute function in M1 version for independent data muting while maintaining SPDIF frame structure.

Encoders, Decoders, Converters Applications

• Compact Disc (CD) audio players
• CD-ROM drives requiring integrated servo and decoding
• Automotive audio systems

Encoders, Decoders, Converters Procurement Notes

Verify component authenticity through authorized NXP distributors or certified suppliers. Confirm the specific M1 variant designation matches design requirements due to the EBU mute feature difference from M0. Check datasheet revision status as this product specification supersedes earlier 2003 data. Ensure compatibility with existing microcontroller interfaces before integration.

Encoders, Decoders, Converters Selection Notes

Select the M1 version if EBU interface muting functionality is required; otherwise, the M0 version may suffice. Ensure the system design accommodates the 1.8 V digital and 3.3 V analog supply rails. Verify that the host microcontroller supports the required I2C or 4-wire bus interface for register configuration. Consider the thermal characteristics of the LQFP-80 package for the intended enclosure.

Encoders, Decoders, Converters Part Context

The SAA7826 consolidates functions previously split between the SAA732X decoder and TZA102X servo/laser controller. This integration simplifies the Bill of Materials (BOM) by reducing external passive components and board space. It maintains software compatibility with the SAA732X through similar register structures, utilizing new shadow registers for additional features like DC offset management and standby modes.

Encoders, Decoders, Converters Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult NXP directly for current lifecycle status and potential obsolescence management strategies given the 2003 publication date.