CDKWM8950-S-1 datasheet, PDF - EEWORLD Datasheet

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CDKWM8950-S-1: DescriptionKIT - WM8950 KIT CDB6162 MB DC; CategoryDevelopment board/suite/development tools; File Size1MB，60 Pages; ManufacturerCirrus Logic; Websitehttp://www.cirrus.com; Environmental Compliance

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KIT - WM8950 KIT CDB6162 MB DC

CDKWM8950-S-1 Parametric

Parameter Name	Attribute value
type	Audio
Function	audio processing
Embedded	-
IC/parts used	WM8950
Main attributes	-
What's included	plate
Auxiliary properties	-

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WM8950

ADC with Microphone Input and Programmable Digital Filters

DESCRIPTION

The WM8950 is a low power, high quality mono ADC designed

for portable applications such as Digital Still Camera, Digital

Voice Recorder or games console accessories.

The device integrates support for a differential or single ended

mic. External component requirements are reduced as no

separate microphone amplifiers are required.

Advanced Sigma Delta Converters are used along with digital

decimation filters to give high quality audio at sample rates

from 8 to 48ks/s. Additional digital filtering options are

available, to cater for application filtering such as wind noise

reduction, noise rejection, plus an advanced mixed signal ALC

function with noise gate is provided.

An on-chip PLL is provided to generate the required Master

Clock from an external reference clock. The PLL clock can

also be output if required elsewhere in the system.

The WM8950 operates at supply voltages from 2.5 to 3.6V,

although the digital supplies can operate at voltages down to

1.71V to save power. Different sections of the chip can also be

powered down under software control by way of the selectable

two or three wire control interface.

WM8950 is supplied in a very small 4x4mm QFN package,

offering high levels of functionality in minimum board area, with

high thermal performance.

FEATURES

Mono ADC:



Audio sample rates:8, 11.025, 16, 22.05, 24, 32, 44.1, 48kHz



SNR 94dB, THD -83dB (‘A’-weighted @ 8 – 48ks/s)



Multiple auxiliary analogue inputs

Mic Preamps:



Differential or single end Microphone Interface

- Programmable preamp gain

- Pseudo differential inputs with common mode rejection

- Programmable ALC / Noise Gate in ADC path



Low-noise bias supplied for electret microphones

OTHER FEATURES



5 band EQ



Programmable High-Pass Filter (wind noise reduction)



Fully Programmable IIR Filter (notch filter)



On-chip PLL



Low power, low voltage

- 2.5V to 3.6V (digital: 1.71V to 3.6V)

- power consumption 10mA all-on 48ks/s mode



4x4x0.9mm 24 lead QFN package

APPLICATIONS



Digital Still Camera

General Purpose low power audio ADC

Games console accessories

Voice recorders

DCVDD

20k

DBVDD

DGND

AGND2

AVDD2

AUX

20k

analog

inputs

WM8950

NOISY

GND

Gains:

-12dB to +35.25dB

MICN

ADC

Digital

Filters

5 Band

Programmable

High Pass

Filter

IIR Filter with

Programmable

Coefficients

Mic

IP PGA

S or

PCM

Interface

FRAME

ADCDAT

BCLK

MICP

IP BOOST/MIX

Rbias

Automatic

Level Control

DSP Core

MICBIAS

50k

500k

50k

500k

PLL

CONTROL

INTERFACE

CSB/GPIO

MCLK

SCLK

MODE

VMID

AGND

AVDD

SDIN

http://www.cirrus.com



Cirrus Logic, Inc., 2005–2016

Rev 4.5

AUG ‘16

WM8950

TABLE OF CONTENTS

DESCRIPTION ....................................................................................................... 1

FEATURES ............................................................................................................ 1

APPLICATIONS..................................................................................................... 1

TABLE OF CONTENTS ......................................................................................... 2

PIN CONFIGURATION .......................................................................................... 3

ORDERING INFORMATION .................................................................................. 3

PIN DESCRIPTION ................................................................................................ 4

ABSOLUTE MAXIMUM RATINGS ........................................................................ 5

RECOMMENDED OPERATING CONDITIONS ..................................................... 5

ELECTRICAL CHARACTERISTICS ..................................................................... 6

TERMINOLOGY ............................................................................................................... 7

SIGNAL TIMING REQUIREMENTS ...................................................................... 8

SYSTEM CLOCK TIMING ................................................................................................ 8

AUDIO INTERFACE TIMING – MASTER MODE ............................................................ 8

AUDIO INTERFACE TIMING – SLAVE MODE ................................................................ 9

CONTROL INTERFACE TIMING – 3-WIRE MODE ....................................................... 10

CONTROL INTERFACE TIMING – 2-WIRE MODE ....................................................... 11

DEVICE DESCRIPTION ...................................................................................... 12

INTRODUCTION ............................................................................................................ 12

INPUT SIGNAL PATH .................................................................................................... 13

ANALOGUE TO DIGITAL CONVERTER (ADC) ............................................................ 18

INPUT AUTOMATIC LEVEL CONTROL (ALC) ............................................................. 22

DIGITAL AUDIO INTERFACES ..................................................................................... 36

AUDIO SAMPLE RATES................................................................................................ 41

MASTER CLOCK AND PHASE LOCKED LOOP (PLL) ................................................. 42

GENERAL PURPOSE INPUT/OUTPUT ........................................................................ 44

CONTROL INTERFACE................................................................................................. 44

RESETTING THE CHIP ................................................................................................. 45

POWER SUPPLIES ....................................................................................................... 46

ADC POWER UP/DOWN SEQUENCE .......................................................................... 46

POWER MANAGEMENT ............................................................................................... 47

DIGITAL FILTER CHARACTERISTICS .............................................................. 50

TERMINOLOGY ............................................................................................................. 50

ADC FILTER RESPONSES ........................................................................................... 50

DE-EMPHASIS FILTER RESPONSES .......................................................................... 51

HIGH-PASS FILTER ...................................................................................................... 52

5-BAND EQUALISER ..................................................................................................... 53

APPLICATIONS INFORMATION ........................................................................ 57

RECOMMENDED EXTERNAL COMPONENTS ............................................................ 57

PACKAGE DIAGRAM ......................................................................................... 58

IMPORTANT NOTICE ......................................................................................... 59

REVISION HISTORY ........................................................................................... 60

Rev 4.5

CDKWM8950-S-1 Related Products

	CDKWM8950-S-1	WM8950GEFL/V	WM8950CGEFL/RV	WM8950CGEFL/V	CDBWM8950-M-1
Description	KIT - WM8950 KIT CDB6162 MB DC	Audio A/D Converter ICs ADC with Mono MIC Input	Audio A/D Converter ICs ADC with Mono MIC INPUT	Audio A/D Converter ICs ADC with Mono MIC INPUT	EVAL BD - WM8950 MINI EVAL BOARD
package instruction	-	HVQCCN,	HVQCCN, LCC24,.16SQ,20	HVQCCN, LCC24,.16SQ,20	-
Reach Compliance Code	-	compliant	compliant	compliant	-
Other features	-	IT ALSO OPERATES AT 1.71 TO 3.6	IT ALSO REQUIRES ANALOG SUPPLY RANGE 2.5 TO 3.6 VOLT	IT ALSO REQUIRES ANALOG SUPPLY RANGE 2.5 TO 3.6 VOLT	-
Commercial integrated circuit types	-	CONSUMER CIRCUIT	CONSUMER CIRCUIT	CONSUMER CIRCUIT	-
JESD-30 code	-	S-PQCC-N24	S-PQCC-N24	S-PQCC-N24	-
length	-	4 mm	4 mm	4 mm	-
Number of functions	-	1	1	1	-
Number of terminals	-	24	24	24	-
Maximum operating temperature	-	85 °C	85 °C	85 °C	-
Minimum operating temperature	-	-40 °C	-40 °C	-40 °C	-
Package body material	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-
encapsulated code	-	HVQCCN	HVQCCN	HVQCCN	-
Package shape	-	SQUARE	SQUARE	SQUARE	-
Package form	-	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	-
Maximum seat height	-	1 mm	0.9 mm	0.9 mm	-
Maximum supply voltage (Vsup)	-	3.6 V	3.6 V	3.6 V	-
Minimum supply voltage (Vsup)	-	2.5 V	1.71 V	1.71 V	-
surface mount	-	YES	YES	YES	-
technology	-	CMOS	CMOS	CMOS	-
Temperature level	-	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-
Terminal form	-	NO LEAD	NO LEAD	NO LEAD	-
Terminal pitch	-	0.5 mm	0.5 mm	0.5 mm	-
Terminal location	-	QUAD	QUAD	QUAD	-
width	-	4 mm	4 mm	4 mm	-

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