CS47L90 Low Power Smart Audio and Sensor Hub System

System Features

Target Applications

The CS47L90 is targeted at mobile and portable applications, including smartphones, tablets and multimedia handsets.

Block Diagram

Schematic

RESET

IRQ

×3

×3

×2

×8

GPSWnN

GPSWnP

SPKDAT

SPKCLK

HPOUTnR

HPOUT3FB

HPOUTnL

GPIOn

AEC (Echo Cancelation)

Loop-Back

SYSCLK

ASYNCCLK

DSPCLK

SLIMCLK

AIFnLRCLK

AIFnBCLK

DAC

DAC

Charge Pumps

JACKDET1

MCLK1

IN2RN

IN1ARN/DMICDAT1, IN1BRN

IN2ALN/DMICDAT2, IN2BLN

IN1ALN, IN1BLN

CS47L90

DMICDATn

DMICCLKn

JACKDET2

MCLK2

IN2RP

IN1ARP/DMICCLK1, IN1BRP

IN2ALP/DMICCLK2, IN2BLP

IN1ALP, IN1BLP

HPDET2

HPDET1

MICDET1/HPOUTFB2

MICDET1/HPOUTFB4

MICDET1/HPOUTFB1

MICDET1/HPOUTFB3

MICBIAS2C

MICBIAS1C

MICBIAS2A

MICBIAS1A

MICBIAS2D

MICBIAS1D

MICBIAS2B

MICBIAS1B

LDO and

MICBIAS

Generators

Input Select

4 × ADC

5 × Stereo

Digital Mic

Interface

Reference

Generator

Accessory

Detect

Digital Audio Interfaces

AIF1, AIF2, AIF3, AIF4

SLIMbus

Interface

Clocking

Control

PDM Driver

GPIO

Digital Core

Programmable multicore DSP sensor hub

Stereo adaptive RX ambient noise cancelation

Advanced multimic TX noise reduction

Advanced multimic acoustic-echo cancelation

Advanced “always-on” buffering

Trigger word detection

Speaker protection

Five-band equalizer (EQ)

Dynamic range control (DRC)

Low pass/high pass filter (LHPF)

Asynchronous sample-rate conversion

Automatic sample-rate detection

PWM signal generator

Haptic control signal generator

“Always on” low current consumption

• Including low power mode A/D converters to

enable low power when using analog mics

32-bit playback support

• Via audio outputs such as headphone,

earpiece and external speakers

• To digital SPDM output and external devices

• Enables 32-bit playback through devices

such as external D/A converters

Enhanced memory sharing between DSP cores

• Up to four 1K windows can

be allocated to any core

• Dramatically improves memory sharing

Seamless advanced clocking architecture

• FLL(s) generate all clocks needed,

internal and external

• To/from any reference from 32 kHz – 27 MHz

with no buffering/streaming gap during swap

• Powerful sample rate conversion

• Lowest possible power for all use cases

• Natural speech recognition with no

pause/prompt

• Simplified software integration

• Jitter-free audio

975 MIPS seven-core audio DSP

• Fixed function signal-processing

functions

G

Dynamic range control,

fully parametric EQs

G

Tone, noise, PWM, haptic

control signal generators

• Multi-channel asynchronous

sample rate conversion

Up to seven analog or ten digital

microphone inputs (two stereo interfaces)

Multipurpose headphone/earpiece/line

output driver

• 30 mW into 32 Ω load at 0.1% THD+N

• Hi-fi filters for audiophile quality playback

Speaker protection

Four full digital audio interfaces

• Standard sample rates from

192 kHz, 32-bits

• TDM support on all AIFs

Compact WCSP package with 0.4-mm,

staggered 173-ball array

Integrated multi-channel 24-bit hi-fi

audio hub codec featuring SmartHIFI™

• Integrated multi-channel 24-bit hi-fi

audio hub codec with SmartHIFI

• Low distortion: 95 dB THD+N

at low power, 32 Ω

• Low noise: 127 dB SNR

headphone playback (48 kHz)

• Dedicated audio FLL minimizes

clock jitter

• High dynamic range: 115 dB

headphone, referenced to 1 V

RMS

• Linearity: >100 dB THD

• Transparent frequency

and phase response

G

+/-0.003 dB

G

Low headphone amp output

impedance maintains

flatness even when driving

complex impedance loads

• Transparent time domain response:

pro audio hi-fi filters (based on

WM8741 pro audio DAC)

• High sample rate and bit depth

G

24/32-bit, 192 kHz playback

• Low headphone amp output

impedance: 0.2 Ω

© 2016 Cirrus Logic, Inc. All rights reserved. Cirrus Logic, Cirrus and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc.

Other brand and product names in this document may be trademarks or service marks of their respective owners.

Cirrus Logic, Inc.

800 West Sixth Street

Austin, Texas 78701

United States

T+1-512-851-4000

T+1-800-888-5016

F+1-512-851-4977

Toll-Free +1-800-888-5016

Sales Support

North America +1-866-630-1158

Asia Pacific +852 2376-0801

Japan +81 (3) 6732-8477

Europe/UK +44 (0) 1628-89 1-300

www.cirrus.com

SEPTEMBER 2016