WM8955LSEFL datasheet, PDF - EEWORLD Datasheet

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WM8955LSEFL: DescriptionConsumer Circuit, CMOS, PQCC32, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTIC, MO-220VHHD-2, QFN-32; CategoryOther integrated circuit (IC) Consumption circuit; File Size534KB，43 Pages; ManufacturerCirrus Logic; Websitehttp://www.cirrus.com; Environmental Compliance

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WM8955LSEFL Overview

Consumer Circuit, CMOS, PQCC32, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTIC, MO-220VHHD-2, QFN-32

WM8955LSEFL Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
package instruction	HVQCCN,
Reach Compliance Code	compliant
Other features	IT ALSO REQUIRES ANALOG SUPPLY RANGE 1.8 TO 3.6 VOLT
Commercial integrated circuit types	CONSUMER CIRCUIT
JESD-30 code	S-PQCC-N32
length	5 mm
Number of functions	1
Number of terminals	32
Maximum operating temperature	85 °C
Minimum operating temperature	-25 °C
Package body material	PLASTIC/EPOXY
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height	1 mm
Maximum supply voltage (Vsup)	3.6 V
Minimum supply voltage (Vsup)	1.42 V
surface mount	YES
technology	CMOS
Temperature level	OTHER
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
width	5 mm
Base Number Matches	1

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DESCRIPTION

The WM8955L is a low power, high quality stereo DAC with

integrated headphone and loudspeaker amplifiers, designed to

reduce external component requirements in portable digital

audio applications.

The on-chip headphone amplifiers can deliver 40mW into a 16Ω

load. Advanced on-chip digital signal processing performs bass

and treble tone control.

The WM8955L can operate as a master or a slave, and

includes an on-chip PLL. It can use most master clock

frequencies commonly found in portable systems, including

USB, GSM, CDMA or PDC clocks, or standard 256f

clock

rates. Different audio sample rates such as 48kHz, 44.1kHz,

8kHz and many others are supported.

The WM8955L operates on supply voltages from 1.8V up to

3.6V, although the digital core can operate on a separate supply

down to 1.42V, saving power. Different sections of the chip can

also be powered down under software control.

The WM8955L is supplied in a very small and thin 5x5mm QFN

package, ideal for use in hand-held and portable systems.

WM8955L

Stereo DAC For Portable Audio Applications

FEATURES

•

DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz, 3.3V)

On-chip 400mW BTL Speaker Driver (mono)

On-chip Headphone Driver

- 40mW output power on 16Ω / 3.3V

- SNR 96dB, THD –79dB at 20mW with 16Ω load

Stereo and Mono Line-in mix into DAC output

Separately Mixed Stereo and Mono Outputs

Digital Tone Control and Bass Boost

Low Power

- Down to 7mW for stereo playback (1.8V / 1.5V supplies)

- 10µW Shutdown Mode

Low Supply Voltages

- Analogue and Digital I/O: 1.8V to 3.6V

- Digital core: 1.42V to 3.6V

Master clocks supported: GSM, CDMA, PDC, USB or

standard audio clocks

Audio sample rates supported: 8, 11.025, 12, 16, 22.05, 24,

32, 44.1, 48, 88.2, 96kHz

32-pin QFN package, 5x5x0.9mm size, 0.5mm lead pitch

APPLICATIONS

•

Smartphone / Multimedia Phone

Digital Audio Player

BLOCK DIAGRAM

WOLFSON MICROELECTRONICS plc

www.wolfsonmicro.com

Production Data, December 2004, Rev 4.1

2004

Wolfson Microelectronics plc

WM8955L

TABLE OF CONTENTS

Production Data

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

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

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

BLOCK DIAGRAM .................................................................................................1

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

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

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

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

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

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

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

OUTPUT PGA’S LINEARITY ......................................................................................... 8

HEADPHONE OUTPUT THD VERSUS POWER........................................................... 9

POWER CONSUMPTION ....................................................................................10

SIGNAL TIMING REQUIREMENTS .....................................................................11

SYSTEM CLOCK TIMING............................................................................................ 11

AUDIO INTERFACE TIMING – MASTER MODE ......................................................... 11

AUDIO INTERFACE TIMING – SLAVE MODE ............................................................ 12

CONTROL INTERFACE TIMING – 3-WIRE MODE ..................................................... 12

CONTROL INTERFACE TIMING – 2-WIRE MODE ..................................................... 13

DEVICE DESCRIPTION.......................................................................................14

INTRODUCTION.......................................................................................................... 14

SIGNAL PATH ............................................................................................................. 14

LINE INPUTS AND OUTPUT MIXERS ........................................................................ 18

ANALOGUE OUTPUTS ............................................................................................... 21

DIGITAL AUDIO INTERFACE...................................................................................... 25

MASTER CLOCK AND PHASE LOCKED LOOP ......................................................... 28

AUDIO SAMPLE RATES.............................................................................................. 30

CONTROL INTERFACE .............................................................................................. 32

POWER SUPPLIES ..................................................................................................... 33

POWER MANAGEMENT ............................................................................................. 34

DIGITAL FILTER CHARACTERISTICS ...............................................................37

TERMINOLOGY........................................................................................................... 37

DAC FILTER RESPONSES ......................................................................................... 37

APPLICATIONS INFORMATION .........................................................................39

RECOMMENDED EXTERNAL COMPONENTS........................................................... 39

LINE OUTPUT CONFIGURATION............................................................................... 40

HEADPHONE OUTPUT CONFIGURATION ................................................................ 41

SPEAKER OUTPUT CONFIGURATION...................................................................... 41

PACKAGE DIMENSIONS ....................................................................................42

IMPORTANT NOTICE ..........................................................................................43

ADDRESS:................................................................................................................... 43

PD Rev 4.1 December 2004

WM8955LSEFL Related Products

	WM8955LSEFL	WM8955LSEFL/R
Description	Consumer Circuit, CMOS, PQCC32, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTIC, MO-220VHHD-2, QFN-32	Consumer Circuit, CMOS, PQCC32, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, PLASTIC, MO-220VHHD-2, QFN-32
Is it Rohs certified?	conform to	conform to
package instruction	HVQCCN,	HVQCCN,
Reach Compliance Code	compliant	compliant
Other features	IT ALSO REQUIRES ANALOG SUPPLY RANGE 1.8 TO 3.6 VOLT	IT ALSO REQUIRES ANALOG SUPPLY RANGE 1.8 TO 3.6 VOLT
Commercial integrated circuit types	CONSUMER CIRCUIT	CONSUMER CIRCUIT
JESD-30 code	S-PQCC-N32	S-PQCC-N32
length	5 mm	5 mm
Number of functions	1	1
Number of terminals	32	32
Maximum operating temperature	85 °C	85 °C
Minimum operating temperature	-25 °C	-25 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HVQCCN	HVQCCN
Package shape	SQUARE	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height	1 mm	1 mm
Maximum supply voltage (Vsup)	3.6 V	3.6 V
Minimum supply voltage (Vsup)	1.42 V	1.42 V
surface mount	YES	YES
technology	CMOS	CMOS
Temperature level	OTHER	OTHER
Terminal form	NO LEAD	NO LEAD
Terminal pitch	0.5 mm	0.5 mm
Terminal location	QUAD	QUAD
width	5 mm	5 mm
Base Number Matches	1	1

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