ADAU1772BCPZ-R7 datasheet(1/117 Pages) AD

Il numero della parte	ADAU1772BCPZ-R7

Spiegazioni elettronici	Four ADC, Two DAC Low Power Codec

PDF	117 Pages

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Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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Four ADC, Two DAC Low Power Codec

with Audio Processor

Data Sheet

ADAU1772

Rev. C

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FEATURES

Programmable audio processing engine

192 kHz processing path

Biquad filters, limiters, volume controls, mixing

Low latency, 24-bit ADCs and DACs

102 dB SNR (signal through PGA and ADC

with A-weighted filter)

107 dB combined SNR (signal through DAC and headphone

with A-weighted filter)

Serial port sample rates from 8 kHz to 192 kHz

38 μs analog-to-analog latency

4 single-ended analog inputs—configurable as microphone

or line inputs

Dual stereo digital microphone inputs

Stereo analog audio output—single-ended or differential,

configurable as either line output or headphone driver

PLL supporting any input clock rate from 8 MHz to 27 MHz

Full-duplex, asynchronous sample rate converters (ASRCs)

Power supplies

Analog and digital I/O of 1.8 V to 3.3 V

Digital signal processing (DSP) core of 1.1 V to 1.8 V

Low power (15 mW for typical noise cancelling solution)

I2C and SPI control interfaces, self-boot from I2C EEPROM

7 MP pins supporting dual stereo digital microphone inputs,

stereo PDM output, mute, DSP bypass, push-button

volume controls, and parameter bank switching

APPLICATIONS

Noise cancelling handsets, headsets, and headphones

Bluetooth ANC handsets, headsets, and headphones

Personal navigation devices

Digital still and video cameras

GENERAL DESCRIPTION

The ADAU1772 is a codec with four inputs and two outputs that

incorporates a digital processing engine to perform filtering,

level control, signal level monitoring, and mixing. The path

from the analog input to the DSP core to the analog output is

optimized for low latency and is ideal for noise cancelling headsets.

With the addition of just a few passive components, a crystal,

and an EEPROM for booting, the ADAU1772 provides a

complete headset solution.

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

MICROPHONE

BIAS GENERATORS

MICBIAS0

MICBIAS1

CM

ADC

MODULATOR

ADC

DECIMATOR

AIN0REF

AIN0

PGA

ADC

MODULATOR

ADC

DECIMATOR

AIN1REF

AIN1

PGA

ADC

MODULATOR

AIN2REF

AIN2

PGA

ADC

MODULATOR

AIN3REF

AIN3

PGA

ADC

DECIMATOR

ADC

DECIMATOR

DMIC0_1/MP4

DMIC2_3/MP5

DIGITAL

MICROPHONE

INPUTS

INPUT/OUTPUT

SIGNAL

ROUTING

DSP CORE:

BIQUAD FILTERS,

LIMITERS,

VOLUME CONTROLS,

MIXING

I2C/SPI CONTROL

INTERFACE AND SELF-BOOT

BIDIRECTIONAL

ASRCS

SERIAL

INPUT/

OUTPUT

PORT

LDO

REGULATOR

POWER

MANAGEMENT

PLL

CLOCK

OSCILLATOR

DAC_SDATA/MP0

ADC_SDATA1/CLKOUT/MP6

XTALI/MCLKIN

XTALO

ADC_SDATA0/PDMOUT/MP1

BCLK/MP2

LRCLK/MP3

DAC

STEREO PDM

MODULATOR

ADAU1772

HPOUTLP/LOUTLP

HPOUTLN/LOUTLN

HPOUTRP/LOUTRP

HPOUTRN/LOUTRN

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