CX20756-11Z datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Wireless rf/communication> Telecom circuit> CX20756-11Z

CX20756-11Z: DescriptionPCM Codec,; CategoryWireless rf/communication Telecom circuit; File Size745KB，48 Pages; ManufacturerCONEXANT; Websitehttp://www.conexant.com/; Environmental Compliance

Download Datasheet Parametric View All

CX20756-11Z Overview

PCM Codec,

CX20756-11Z Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Objectid	1379030528
package instruction	,
Reach Compliance Code	compliant
JESD-609 code	e3
Peak Reflow Temperature (Celsius)	260
Telecom integrated circuit types	PCM CODEC
Terminal surface	Matte Tin (Sn)
Maximum time at peak reflow temperature	40

Preview

Download Datasheet

View All

CX20756 Low-Power High Definition Audio

CODEC

Data Sheet

General Description

Conexant's CX20756 is a low-power, 102dB Signal-to-

Noise Ratio (SNR), High Definition (HD) audio Coder-

Decoder (CODEC) that delivers high-quality audio for the

mobile Personal Computer (PC) market, including

notebooks, ultrabooks, and tablets.

Compliant with Intel's

HD Audio Specification 1.0a,

the

CX20756 has audio fidelity that exceeds Microsoft

desktop and notebook premium logo requirements,

including Windows 8.x. The CX20756 includes two stereo

Digital-to-Analog Converters (DACs) and Analog-to-

Digital Converters (ADCs), a 2.8W stereo class-D, a

capless headphone, an integrated headset, and digital

microphones.

By combining these hardware features with Conexant's

extensive voice and speech processing algorithms, the

CODEC is the ideal solution for platforms that need

Microsoft Lync, Skype, and Automatic Speech

Recognition (ASR) certification.

Features

•

Two pairs of independent DACs and ADCs

Independent sampling rates for DACs and ADCs—

supports audio formats ranging from 16-bit to 24-bit,

44.1kHz to 192kHz for DAC, and 44.1kHz to 96kHz for

ADC

2.8W

RMS

per channel class-D stereo speaker amplifier

with spread spectrum

SpeakerShield technology provides load-based

speaker protection independent of driver and OS—

Protection includes Direct Current (DC), short, near-

short, and temperature

ProCoustic capless stereo headphone driver delivers

32mW into 32 load with no pops

Built-in four-conductor headset jack support with in-

line command sensing

Hum noise is prevented on external powered speakers

plugged into the headset jack when the system is off

Universal jack supports headsets, headphones,

external microphones, and external line-in devices

Digital Microphone Interface (DMIC) with boost

supporting two digital microphone elements and DC

offset removal

Record security prevents unwanted recordings from all

or selected input ports

Analog and digital PC Beep are supported, and Wake-

on-beep never misses a beep—even when in low-

power mode

Multiple General Purpose Input/Outputs (GPIOs) for

custom applications

Integrated Low Drop-Out (LDO) regulators

Headphone limiter supports GS Mark EN50332-2

without an external Bill Of Materials (BOM)

•

Applications

•

Notebooks

Ultrabooks

Desktop and all-in-one PCs

Tablets

Embedded applications

•

System Compatibility

•

HD Audio Specification 1.0a

Windows XP/Vista/7/8.x

Microsoft Premium Logo

Linux

Android

•

01/08/15

Conexant Confidential

• www.conexant.com

004-56DSR01

CX20756 Data Sheet

Table of Contents

General Description.......................................................................................................................................................i

Applications ...................................................................................................................................................................i

System Compatibility ....................................................................................................................................................i

Features..........................................................................................................................................................................i

Revision History ...........................................................................................................................................................ii

Introduction...................................................................................................................................................................1

Overview............................................................................................................................................................................... 1

CX20756 Audio CODEC Features....................................................................................................................................... 2

System Compatibility .......................................................................................................................................................... 3

Hardware Qualification Process (HQP).............................................................................................................................. 3

Hardware Interface .......................................................................................................................................................4

General ................................................................................................................................................................................. 4

High Definition (HD) Audio Host Interface .................................................................................................................. 4

Control Signals ........................................................................................................................................................... 4

Audio Signals.............................................................................................................................................................. 4

CX20756 Block Diagram...................................................................................................................................................... 5

Pin Assignments and Signal Definitions........................................................................................................................... 6

Absolute Maximum Ratings.............................................................................................................................................. 12

Electrical Characteristics.................................................................................................................................................. 13

Device Performance Specifications................................................................................................................................. 14

Power Management and Power Consumption................................................................................................................ 17

Power Management.................................................................................................................................................. 17

Power Supply Minimum/Maximum Ratings .............................................................................................................. 17

Power Consumption ................................................................................................................................................. 18

Integrated Low Drop-Out (LDO) Regulators ............................................................................................................. 19

Digital High-Pass Filter (HPF)................................................................................................................................... 20

Alternating Current (AC) Timing Characteristics............................................................................................................ 21

Digital Microphone Interface (DMIC) ........................................................................................................................ 21

HD Audio Clocks....................................................................................................................................................... 22

Data Output and Input .............................................................................................................................................. 23

Package Dimensions and Thermal Specifications ......................................................................................................... 24

HD Audio Interface......................................................................................................................................................26

Overview............................................................................................................................................................................. 26

Conexant Confidential

01/08/15

004-56DSR01

iii

CX20756 Data Sheet

Table of Contents

Verbs................................................................................................................................................................................... 27

Node ID 00: Root Node ............................................................................................................................................ 28

Node ID 01: Audio Function Group (AFG)................................................................................................................ 29

Nodes 10, 11: DAC 1, 2 Widgets.............................................................................................................................. 31

Node 12: PC Beep Generator Widget ...................................................................................................................... 32

Node 13, 14: ADC 1, 2 Widget ................................................................................................................................. 33

Node 15: Mixer Widget ............................................................................................................................................. 35

Node 16: Port A/Vendor Widget ............................................................................................................................... 36

Node 17: Port G........................................................................................................................................................ 37

Node 18: Port B Widget ............................................................................................................................................ 38

Node 19: Port D Widget............................................................................................................................................ 40

Node 1A: Port C Widget ........................................................................................................................................... 41

Ordering Information..................................................................................................................................................42

Conexant Confidential

01/08/15

004-56DSR01

Recommended Resources

ON Semiconductor launches new series of power modules Overview

Thermostatic control circuit three using 555 time base integrated circuit

Use TWH9248 and 9249 to make automatic lights

Analog signal isolator circuit using optocoupler

M50111P/AP/BP/CP (VCR, TV and audio equipment) 30-function infrared remote control receiving circuit

Digitally controlled variable gain amplifier

Shortcut: E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF EG EH EI EJ EK EL EM EN EO EP EQ ER ES ET EU EV EW EX EY EZ F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF FG FH FI FJ FK FL FM FN FO FP FQ FR FS FT FU FV FW FX FY FZ G0 G1 G2 G3 G4 G5 G6 G7 G8 G9 GA GB GC GD GE GF GG GH GI GJ GK GL GM GN GO GP GQ GR GS GT GU GV GW GX GZ H0 H1 H2 H3 H4 H5 H6 H7 H8 HA HB HC HD HE HF HG HH HI HJ HK HL HM HN HO HP HQ HR HS HT HU HV HW HX HY HZ I1 I2 I3 I4 I5 I6 I7 IA IB IC ID IE IF IG IH II IK IL IM IN IO IP IQ IR IS IT IU IV IW IX J0 J1 J2 J6 J7 JA JB JC JD JE JF JG JH JJ JK JL JM JN JP JQ JR JS JT JV JW JX JZ K0 K1 K2 K3 K4 K5 K6 K7 K8 K9 KA KB KC KD KE KF KG KH KI KJ KK KL KM KN KO KP KQ KR KS KT KU KV KW KX KY KZ

Popular Components