adau1373 Analog Devices, Inc., adau1373 Datasheet

adau1373

Manufacturer Part Number

adau1373

Description

Low Power Codec With Speaker And Headphone Amplifier Adau1373

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADAU1373.pdf (296 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

adau1373BCBZ-R7

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FEATURES

1 stereo ADC and 2 stereo DACs with sampling rates

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,

Filterless stereo Class-D speaker amplifier, capable of 2 ×

Differential earpiece amplifier capable of driving 32 Ω

2 PLLs, supporting input clocks from 8 kHz to 27 MHz

Digital audio processing

3 digital audio input and output ports with ASRC

4.05 mm × 3.82 mm, 81-ball, 0.4 mm pitch WLCSP package

−40°C to +85°C operating temperature range

APPLICATIONS

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

GENERAL DESCRIPTION

The

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.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

C control interface

from 8 kHz to 48 kHz

capable of 2 × 50 mW into 16 Ω at 1.8 V, 10% THD

880 mW into 8 Ω at 3.6 V, 10% THD

S, PCM, right-justified, left-justified modes

ADAU1373

is a low power, stereo audio codec with integrated

SDATAOUTA/SDATAOUTB/SDATAOUTC

SDATAINA/SDATAINB/SDATAINC

AIN1R/AIN1N TO AIN4R/AIN4N

AIN1L/AIN1P TO AIN4L/AIN4P

LRCLKA/LRCLKB/LRCLKC

BCLKA/BCLKB/BCLKC

MICBIAS1, MICBIAS2

DMIC1_2_DATA

DMIC3_4_DATA

DMIC_CLK

ANALOG

INPUTS

FUNCTIONAL BLOCK DIAGRAM

INTERFACE

MICROPHONE

DIGITAL

SERIAL

AUDIO

DIGITAL

PLLA

MUX

MIX

OUTPUT

Low Power Codec with Speaker and

INPUT

ADC

MUX

Figure 1.

DAC1

DAC2

GPIO

FDSP

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

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.

MUX

MIX

HEADPHONE

LINEOUT1

EARPIECE

LINEOUT2

SPEAKER

AMP

EPP

EPN

LOUT1L/LOUTLP, LOUT2L/LOUTLN

LOUT1R/LOUTRP, LOUT2R/LOUTRN

LN1FBIN, LN2FBIN

HPL

SGND

HPR

SPKLP

SPKLN

SPKRP

SPKRN

Headphone Amplifier

ADAU1373

www.analog.com

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