AD1986BSTZ

Overview

The AD1986BSTZ is an AC '97 2.3 compliant audio CODEC featuring six DAC channels for 5.1 surround sound and integrated headphone amplifiers. It supports variable rate audio up to 96 kHz with 20-bit ADC and 24-bit DAC resolution, achieving over 90 dB dynamic range. The device includes a parametric equalizer, stereo microphone preamplifier with up to 30 dB gain boost, and advanced jack presence detection for eight jacks. Power management modes reduce consumption significantly in standby states.

Feature Summary

• Integrated parametric equalizer and stereo microphone preamplifier with software-controlled gain boost
• Advanced jack sense with auto topology switching and support for up to eight jacks
• Dual independent headphone drivers on LINE_OUT and HP_OUT pins
• Internal mixing capabilities allowing microphone, line-in, and C/LFE sharing without external components

Applications

• AC '97 compliant desktop and laptop motherboard audio subsystems
• 5.1 channel surround sound systems requiring S/PDIF output
• Portable or low-power audio applications utilizing power-down modes
• Systems requiring integrated headphone amplification and jack sensing

Procurement Notes

Verify the component matches the specific Analog Devices part number AD1986BSTZ. Confirm the package type is 48-pin LQFP as specified in the official documentation. Ensure the revision level aligns with Rev. 0 datasheet requirements for AC '97 2.3 compliance. Check for any specific ordering suffixes that might indicate tape-and-reel packaging versus tray quantities if applicable to your supply chain needs.

Selection Notes

Select this component when designing systems requiring AC '97 2.3 interface compatibility with high-channel-count audio output. It is suitable for applications needing integrated headphone driving and reduced external component counts due to internal mixing and biasing features. Consider the 48-pin LQFP package constraints and the requirement for separate analog (AVDD) and digital (DVDD) power supplies during the schematic design phase.

Part Context

The AD1986 is part of Analog Devices' AC '97 SoundMAX codec family. It is designed to replace discrete audio solutions by integrating multiple functions into a single chip. The BSTZ suffix typically denotes a lead-free, RoHS-compliant version in the 48-lead LQFP package. This component serves as a central audio processing unit for PC motherboards and similar consumer electronics platforms.

Replacement Considerations

Direct replacement options should be verified against the official Analog Devices substitution guide. Cross-reference pinouts and register maps to ensure compatibility with existing system firmware. Verify that alternative codecs support the same AC '97 2.3 specification and feature set, such as jack sensing and parametric EQ.