adau1461 Analog Devices, Inc., adau1461 Datasheet

adau1461

Manufacturer Part Number

adau1461

Description

Sigmadsp Stereo, Low Power, 96 Khz, 24-bit Audio Codec With Integrated Pll Adau1461

Manufacturer

Analog Devices, Inc.

Datasheet

1.ADAU1461.pdf (88 pages)

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FEATURES

SigmaDSP 28-/56-bit, 50 MIPS digital audio processor

Fully programmable with SigmaStudio graphical tool

24-bit stereo audio ADC and DAC: >98 dB SNR

Sampling rates from 8 kHz to 96 kHz

Low power: 17 mW record, 18 mW playback, 48 kHz

6 analog input pins, configurable for single-ended or

Flexible analog input/output mixers

Stereo digital microphone input

Analog outputs: 2 differential stereo, 2 single-ended stereo,

PLL supporting input clocks from 8 MHz to 27 MHz

Analog automatic level control (ALC)

Microphone bias reference voltage

Analog and digital I/O: 3.3 V

Digital audio serial data I/O: stereo and time-division

Software-controllable clickless mute

GPIO pins for digital controls and outputs

32-lead, 5 mm × 5 mm LFCSP

−40°C to +105°C operating temperature range

Qualified for automotive applications

APPLICATIONS

Automotive head units

Automotive amplifiers

Navigation systems

Rear-seat entertainment systems

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 and SPI control interfaces

differential inputs

1 mono headphone output driver

multiplexing (TDM) modes

JACKDET/MICIN

MICBIAS

RAUX

LAUX

RINP

RINN

LINP

LINN

MICROPHONE

MIXERS

INPUT

ALC

BIAS

FUNCTIONAL BLOCK DIAGRAM

MCLK

24-Bit Audio Codec with Integrated PLL

PLL

ADC

SigmaDSP Stereo, Low Power, 96 kHz,

DETECTION

HP JACK

INPUT/OUTPUT PORTS

FILTERS

DIGITAL

SERIAL DATA

ADC

Figure 1.

REGULATOR

FILTERS

DIGITAL

DAC

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

Tel: 781.329.4700

Fax: 781.461.3113

GENERAL DESCRIPTION

The ADAU1461 is a low power, stereo audio codec with

integrated digital audio processing that supports stereo 48 kHz

record and playback at 35 mW from a 3.3 V analog supply. The

stereo audio ADCs and DACs support sample rates from 8 kHz

to 96 kHz as well as a digital volume control.

The SigmaDSP® core features 28-bit processing (56-bit double

precision). The processor allows system designers to compensate

for the real-world limitations of microphones, speakers, amplifiers,

and listening environments, resulting in a dramatic improvement

in the perceived audio quality through equalization, multiband

compression, limiting, and third-party branded algorithms.

The SigmaStudio™ graphical development tool is used to program

the ADAU1461. This software includes audio processing blocks

such as filters, dynamics processors, mixers, and low level DSP

functions for fast development of custom signal flows.

The record path includes an integrated microphone bias circuit

and six inputs. The inputs can be mixed and muxed before the

ADC, or they can be configured to bypass the ADC. The

ADAU1461 includes a stereo digital microphone input.

The ADAU1461 includes five high power output drivers (two

differential and three single-ended), supporting stereo head-

phones, an earpiece, or other output transducer. AC-coupled

or capless configurations are supported. Individual fine level

controls are supported on all analog outputs. The output mixer

stage allows for flexible routing of audio.

CLATCH

ADDR0/

DAC

CONTROL PORT

ADDR1/

CDATA

ADAU1461

C/SPI

OUTPUT

MIXERS

CCLK

SCL/

COUT

SDA/

LOUTP

LOUTN

LHP

MONOOUT

RHP

ROUTP

ROUTN

ADAU1461

www.analog.com

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