Add to Signal Chain Designer

ADAU1373:  Low Power Codec with Speaker and Headphone Amplifier

Product Details

The ADAU1373 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback. The stereo audio ADCs and DACs support sampling rates from 8 kHz to 48 kHz, as well as a digital volume control.

Eight single-ended or four differential analog inputs with PGAs are provided for adjusting the gain from −12 dB to +18 dB. They can be configured for microphones or line level signals.

Two stereo digital microphone inputs are supported; four digital microphones can be connected in total. In addition, three serial digital audio input/output ports are provided with asynchronous sample rate converters (ASRCs) to support various sampling rates, allowing for flexible system design in mobile phone applications. The inputs can be mixed and selected before the ADC or con-figured to bypass the ADC. Two stereo DACs are included, with a flexible mixing option for routing the signals internally.

The analog output side consists of line outputs, headphone output, speaker output, and receiver output. Two stereo single-ended line level outputs, which can be configured as two differential outputs, are included. The headphone output is stereo true ground centered (eliminating the need for coupling capacitors), with efficient Class-G (rail switching) architecture. The efficient stereo filterless Class-D switching amplifier provides ~1 W of stereo power for speakers. The differential receiver amplifier can be used to connect the separate receiver speaker. Two PLL blocks, which can lock to the inputs from 8 kHz to 27 MHz, are included.

The DSP allows system designers to compensate for the real-world limitations of microphones, speakers, amplifiers, and listening environments, resulting in a dramatic improvement in perceived audio quality through equalization, multiband compression, and limiting algorithms. The SigmaStudio™ graphical development tool, which includes audio processing blocks such as filters, mixers, dynamics processors, and amplifiers for fast development of custom signal flows, is used to program the ADAU1373.


  • Mobile phones
  • tablet PCs
  • e-books
  • portable media players


  • 1 stereo ADC and 2 stereo DACs with sampling rates from 8 kHz to 48 kHz
  • Low power: 7 mW record, 6 mW playback, 48 kHz at 1.8 V
  • 8 single-ended or 4 differential inputs with PGA
  • 2 microphone bias reference voltages with current sense
  • 2 stereo digital microphone inputs
  • Flexible analog input/output mixers
  • 1 stereo differential or 2 stereo single-ended line outputs
  • True ground-centered stereo Class-G headphone amplifier, capable of 2 × 50 mW into 16 Ω at 1.8 V, 10% THD
  • Filterless stereo Class-D speaker amplifier, capable of 2 × 880 mW into 8 Ω at 3.6 V, 10% THD
  • Differential earpiece amplifier capable of driving 32 Ω
  • 2 PLLs, supporting input clocks from 8 kHz to 27 MHz
  • See data sheet for additional features

Functional Block Diagram for ADAU1373

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADAU1373 Sound CODEC Linux Driver Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products

Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

Were these recommendations helpful?

SampleSample & Buy

Price, packaging, availability

ADAU1373 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADAU1373BCBZ-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 81 Ind Reel, 1000 - $3.78 Y  Material Info Notify Me Purchase Sample
ADAU1373BCBZ-RL Status: Production CHIPS W/SOLDER BUMPS/WLCSP 81 Ind Reel, 3000 - $3.78 Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADAU1373 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-ADAU1373Z Status: Obsolete Evaluation Board - Yes - Contact ADI

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

Check Inventory & Purchase

View Sales and Distribution Offices

content here.
content here.

Review this Product