Analog Devices AD1981BL AC ’97 SoundMAX Codec Datasheet

About this manual

The AD1981BL is an AC ’97 2.3‑compatible audio codec featuring a 20‑bit DAC, S/PDIF output, integrated headphone amplifier, and multiple analog inputs. It operates from 3.3 V supplies and supports sample rates from 7.04 kHz up to 48 kHz with programmable gain and digital equalization.

The document provides full electrical specifications, absolute maximum ratings, timing parameters, pin configuration for the 48‑lead LQFP package, and detailed register maps for control, volume, and power‑down functions. Ordering information and package dimensions are also included.

What's inside

• Specifications
• Test Conditions
• General Specifications
• Power-Down States
• Timing Parameters
• Absolute Maximum Ratings
• Environmental Conditions
• Pin Configuration and Function Descriptions
• Control Registers
• Vendor ID Registers

Specifications

Frequently asked questions

What is the operating temperature range of the AD1981BL?

The device is rated for ambient temperatures from 0 °C to 70 °C.

What is the digital supply voltage range for the AD1981BL?

The digital supply (DVDD) may be between –0.3 V and +3.6 V.

How many pins does the AD1981BL package have?

It uses a 48‑lead low‑profile quad flat package (LQFP).

Does the AD1981BL support S/PDIF output?

Yes, the codec includes an S/PDIF output pin.