AD1981B屬于集成電路（IC）的編解碼器。由亞德諾半導體技術有限公司制造生產的AD1981B編解碼器編解碼器是用于通過壓縮和解壓縮來轉換數據的半導體器件。數據壓縮可提高傳輸速度并減少存儲空間。某些編解碼器提供高達 32 位的分辨率，并且分別提供多達 6 個或 8 個模數轉換器和數模轉換器。除三角積分調制外，還有 I2C、I2S、SPI、串行、HDA、S/DIF、PCM、USB、AC'97 和 SLIMbus 數據接口。

FEATURES

AC ’97 2.3 COMPATIBLE FEATURES

S/PDIF Output, 20 Bits Data Format, Supporting

48 kHz and 44.1 kHz Sample Rates

Integrated Stereo Headphone Amplifier

Variable Sample Rate Audio

External Audio Power-Down Control

Greater than 90 dB Dynamic Range

Stereo Full-Duplex Codec

20-Bit PCM DAC

3 Analog Line-Level Stereo Inputs for Line-In, AUX, and CD

Mono Line-Level Phone Input

Dual MIC Input with Built-In Programmable Preamp

High Quality CD Input with Ground Sense

Mono Output for Speakerphone or Internal Speaker

Power Management Support

48-Lead LQFP Package, Lead-Free Available

ENHANCED FEATURES

Stereo MIC Preamps Support

Built-In Digital Equalizer Function for Optimized Speaker Sound

Full-Duplex Variable Sample Rates from 7040 Hz to 48 kHz with 1 Hz Resolution

Jack Sense Pins Provide Automatic Output Switching

Software Programmed VREFOUT Output for Biasing Microphone and External Power Amp

Split Power Supplies: 3.3 V Digital and 5 V Analog

Multiple Codec Configuration Options