ADAU1373

Obsolete

Low Power Codec with Speaker and Headphone Amplifier

Data Sheet (Rev. 0) Product Selection Table

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Overview

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

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.

APPLICATIONS

Mobile phones
tablet PCs
e-books
portable media players

Documentation

Data Sheet 1

ADAU1373: Low Power Codec with Speaker and Headphone Amplifier (Rev.0) 05/10/2011

User Guide 1

UG-284: ADAU1373 Evaluation Board User Guide 06/10/2011

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

ADAU1373 Sound CODEC GitHub Linux Driver Source Code

Can't find the software or driver you need?

Hardware Ecosystem

Parts	Product Life Cycle	Description
Audio Amplifiers 6
ADMP421	Obsolete	iMEMS^® Microphone Omni Directional Microphone with Bottom Port and Digital Output
ADMP521	Obsolete	Ultra-Low Noise Microphone with Bottom Port and PDM Digital Output
ADMP401	Obsolete	Omnidirectional Microphone with Bottom Port and Analog Output
ADMP404	Obsolete	Omnidirectional Microphone with Bottom Port and Analog Output

ADMP405	Obsolete	Omnidirectional Microphone with Bottom Port and Analog Output
ADMP504	Obsolete	UltraLow Noise Microphone with Bottom Port and Analog Output