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Product Detailed Parameters
- Description：IC CODEC STEREO MICPREAMP 48LQFP
- Series：SoundMAX®
- Mfr：Analog Devices Inc.
- Package：Cut Tape (CT),Bulk
- Type：Audio Codec '97
- Data Interface：Serial
- Resolution (Bits)：16, 20 b
- Sigma Delta：No
- S/N Ratio, ADCs / DACs (db) Typ：-
- Dynamic Range, ADCs / DACs (db) Typ：85 / 90
- Voltage - Supply, Analog：4.5V ~ 5.5V
- Voltage - Supply, Digital：3V ~ 3.47V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：48-LQFP
- Supplier Device Package：48-LQFP (7x7)
- Grade：-
- Qualification：-
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Overview
The AD1981BJST-REEL is an AC '97 2.3 compatible stereo full-duplex audio codec manufactured by Analog Devices Inc. It features a 20-bit Sigma-Delta DAC and dual 16-bit Sigma-Delta ADCs, supporting variable sample rates from 7040 Hz to 48 kHz with 1 Hz resolution. The device integrates a stereo headphone amplifier, dual microphone inputs with programmable preamplifiers, and S/PDIF output capability. It operates on split power supplies of 5 V analog and 3.3 V digital, housed in a 48-lead LQFP package.
Feature Summary
- Integrated stereo headphone amplifier with jack sense pins for automatic output switching
- Built-in digital equalizer function for optimized speaker sound
- Dual MIC input with built-in programmable preamplifier support
- Software-programmable VREFOUT output for biasing microphones and external amplifiers
Applications
- AC '97 compliant motherboard audio subsystems
- Desktop PC sound cards requiring integrated headphone amplification
- Telephony systems utilizing the mono phone input and speakerphone output
Procurement Notes
Verify the specific suffix 'JST' against the manufacturer's current ordering guide to confirm lead time and packaging details. Ensure the component matches the Rev C datasheet specifications for AC '97 compatibility and pinout configuration before integration into the design.
Selection Notes
Select this component when a system requires an AC '97 interface with integrated headphone driving capabilities and S/PDIF output. It is suitable for designs needing split power supply operation (5V analog/3.3V digital) and multiple analog inputs including differential CD input.
Part Context
This part belongs to the Analog Devices AD198x series of AC '97 codecs. It is designed for high-quality audio processing in personal computers and consumer electronics, offering full-duplex audio capabilities with integrated control logic and mixing functions within a single package.
Replacement Considerations
Check for direct replacements within the AD198x family such as the AD1981A or AD1981B variants, ensuring pin compatibility and feature parity. Verify that any substitute maintains AC '97 2.3 compliance and supports the required 48-lead LQFP package.
