DataSheet26.com

NAU85L20 PDF даташит

Спецификация NAU85L20 изготовлена ​​​​«nuvoton» и имеет функцию, называемую «Dual Audio ADC».

Детали детали

Номер произв NAU85L20
Описание Dual Audio ADC
Производители nuvoton
логотип nuvoton логотип 

30 Pages
scroll

No Preview Available !

NAU85L20 Даташит, Описание, Даташиты
NAU85L20 Data Sheet
NAU85L20
Dual Audio ADC with Integrated FLL and Microphone Preamplifier
Description
The NAU85L20 is a low power, high quality, 2-channel ADC for microphone array application. The NAU85L20
integrates programmable gain preamplifiers for stereo differential microphones, significantly reducing external
component requirements. A fractional FLL is available to accurately generate any audio sample rate using any
commonly available system clock source from 8KHz through 33MHz. Audio data can be directed to I2S data out
lines.
The NAU85L20 operates with analog supply voltages from 1.6V to 2V, while the digital core can operate down to
1.2V to conserve power. Internal register controls enable flexible power saving modes by powering down sub-
sections of the chip under software control. The NAU85L20 is specified for operation from -40°C to +85°C, and is
available in a 28-lead QFN package.
Features
101dB SNR (A-weighted) @ 0dB gain,
Supports sample rates from 8 kHz to 48 kHz at 24-
VDDA=1.8V, Fs = 48 kHz, OSR=128x
91dB THD+N @ 0dB gain, 0.8Vrms in,
VDDA=1.8V, Fs=48 kHz, OSR=128x
-124dB Channel Crosstalk @ 0dB gain, 0.9Vrms
in, VDDA=1.8V, Fs=48 kHz, OSR=128x
Integrated programmable gain microphone
amplifier
On-chip FLL
I2C Serial control interface with read/write
bit resolution
Two separate microphone bias supplies for low
noise microphone biasing.
Standard audio data bus interfaces: I2S, Left or
Right justified, Two’s compliment, MSB first
32-bit audio sub frames
Package: Pb free 28L-QFN
Temperature range: -40 to 85°
capability
Block Diagram
MIC1P
MIC1N
MIC2P
MIC2N
MICBIAS1
MICBIAS2
ADC Digital Core
HPF
NF
ADC ALC
u/A Law
Compression
MICBIAS 1
MICBIAS 2
FLL
Audio
Interface
I2S/PCM
BCLK
FS
DO12
I2C/SPI
SCLK
SDIO
CSB
MODE
Nuvoton Technology Corporation America
Tel: 1-408-544-1718
Fax: 1-408-544-1787
Rev. 0.1.6: May 10, 2016
1









No Preview Available !

NAU85L20 Даташит, Описание, Даташиты
NAU85L20
Table of Contents
BLOCK DIAGRAM........................................................................................................................................ 1
PIN DIAGRAM .............................................................................................................................................. 4
Ordering Information ................................................................................................................................................ 4
PIN DESCRIPTION ...................................................................................................................................... 5
ELECTRICAL CHARACTERISTICS ............................................................................................................ 6
1 GENERAL DESCRIPTION ................................................................................................................. 9
2 ANALOG INPUTS............................................................................................................................... 9
2.1 ADC and Digital Signal Processing ............................................................................................................10
2.2 ADC Digital Block .......................................................................................................................................10
2.2.1 Input Limiter / Automatic Level Control (ALC) .....................................................................................11
2.2.2 ADC Digital Volume Control ................................................................................................................15
2.2.3 ADC Programmable High Pass Filter ..................................................................................................15
2.2.4 Programmable Notch Filter .................................................................................................................16
2.3 Audio Data Companding ............................................................................................................................16
2.3.1 µ-law ...................................................................................................................................................17
2.3.2 A-law ...................................................................................................................................................17
2.4 Digital Interfaces.........................................................................................................................................17
3 POWER SUPPLY ............................................................................................................................. 17
3.1 Power on and off reset ...............................................................................................................................17
3.2 Reference Voltage Generation ...................................................................................................................18
3.3 Microphone Bias Generation ......................................................................................................................19
4 CLOCKING AND SAMPLE RATES.................................................................................................. 19
4.1 PCM Clock Generation...............................................................................................................................21
4.2 Frequency Locked Loop (FLL) ...................................................................................................................22
5 CONTROL INTERFACES................................................................................................................. 24
5.1 Selection of Control Mode ..........................................................................................................................24
5.2 2-Wire-Serial Control Mode (I2C Style Interface) ........................................................................................25
5.3 2-Wire Protocol Convention........................................................................................................................25
5.4 2-Wire Write Operation...............................................................................................................................25
5.5 2-Wire Read Operation...............................................................................................................................26
5.6 Digital Serial Interface Timing.....................................................................................................................26
5.7 Software Reset...........................................................................................................................................27
6 DIGITAL AUDIO INTERFACE .......................................................................................................... 27
6.1 Right-Justified Audio Data ..........................................................................................................................28
6.2 Left-Justified Audio Data ............................................................................................................................28
6.3 I2S Audio Data Mode .................................................................................................................................29
6.4 PCM A Audio Data .....................................................................................................................................29
6.5 PCM B Audio Data .....................................................................................................................................30
6.6 PCM Time Slot Audio Data.........................................................................................................................30
7 REGISTER MAP............................................................................................................................... 32
8 TYPICAL APPLICATION DIAGRAM ................................................................................................ 43
9 PACKAGE INFORMATION .............................................................................................................. 45
Nuvoton Technology Corporation America
Tel: 1-408-544-1718
Fax: 1-408-544-1787
Rev. 0.1.9: May 10, 2016
2









No Preview Available !

NAU85L20 Даташит, Описание, Даташиты
NAU85L20
9.1 VERSION HISTORY ............................................................................................................................ 46
10 ORDERING INFORMATION ............................................................................................................ 46
Nuvoton Technology Corporation America
Tel: 1-408-544-1718
Fax: 1-408-544-1787
Rev. 0.1.9: May 10, 2016
3










Скачать PDF:

[ NAU85L20.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
NAU85L20Dual Audio ADCnuvoton
nuvoton

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск