WM8351CGEB/RV

WM8351CGEB/RV Datasheet

WM8351

Part	Datasheet
WM8351CGEB/RV	WM8351CGEB/RV (pdf)

Related Parts	Information
CDKWM8351-S-1	CDKWM8351-S-1
WM8351CGEB/V	WM8351CGEB/V

PDF Datasheet Preview
WM8351 Wolfson AudioPlus Stereo CODEC with Power Management The WM8351 is an integrated audio and power management subsystem which provides a cost effective, single-chip solution for portable audio and multimedia systems. The integrated audio CODEC provides all the necessary functions for high-quality stereo recording and playback. Programmable on-chip amplifiers allow for the direct connection of headphones and microphones with a minimum of external components. A programmable low-noise bias voltage is available to feed one or more electret microphones. Additional audio features include programmable high-pass filter in the ADC input path. The WM8351 includes four programmable DC-DC converters, four low-dropout LDO regulators and a current limit switch to generate suitable supply voltages for each part of the system, including the integrated audio CODEC as well as off-chip components such as a digital core and I/O supplies, and LED lighting. An additional on-chip regulator maintains the backup power for always-on functions. The WM8351 can be powered by a lithium battery, by a wall adaptor or USB. An on-chip battery charger supports both trickle charging and fast constant current, constant voltage charging of single-cell lithium batteries. The charge current, termination voltage, and charger time-out are programmable to suit different types of batteries. Internal power management circuitry controls the start-up and shutdown sequencing of clocks and supply voltages. It also detects and handles conditions such as under-voltage, extreme temperatures, and deeply discharged or defective batteries, with a minimum of software involvement. A programmable constant-current sink is available for driving LED strings, e.g. for display backlights or photo-flash applications, in a highly power-efficient way. Additional RGB LEDs can be driven through GPIO pins. The WM8351 includes a 32.768kHz crystal oscillator, an internal RC oscillator, a real-time clock RTC and an alarm function capable of waking up the system. Internal circuitry can generate all clock signals required to start up the device. The master clock for the audio CODEC can be input directly, or may be generated internally using an integrated, low power Frequency Locked Loop FLL . To extend battery life, fine-grained power management enables each function in the WM8351 to be independently powered down through the control interface. The WM8351 forms part of the Wolfson AudioPlusTM series of audio and power management solutions. Stereo Hi-Fi CODEC • DAC SNR 95dB ‘A’ weighted 48kHz , THD • ADC SNR 95dB ‘A’ weighted 48kHz , THD • 40mW on-chip headphone driver with ‘capless’ option • headphone load THD -72dB, Po = 20mW • 2 differential microphone inputs with low-noise bias voltage and programmable preamps • Programmable high-pass filter for ADC • Microphone and Headphone detection • Auxiliary inputs for analogue signals • Sample rates 8, 16, 24, 32, or 48kHz System Control • Support for 2-wire or 3-/4-wire Control Interface • Handles power sequencing, reset signals and fault conditions • Autonomous power source selection battery, wall adaptor or USB bus • Total current drawn from USB bus is limited to comply with USB standard and USB OTG supplement Supply Generation • 1 x DC-DC Buck Converter 0.85V - 3.4V, Up to 1A • 2 x DC-DC Buck Converters 0.85V - 3.4V, Up to 500mA • 1 x DC-DC Boost Converter 5V - 20V, 40 to 200mA • 4 x LDO voltage regulators 0.9V - 3.3V, 150mA LED Drivers • Programmable constant-current sink, suitable for screen backlight or white LED photo flash • 3 open-drain outputs for RGB LEDs Battery Charger • Single-cell Li-Ion / Li-Pol battery charger • Thermal protection for charge control temperature monitoring available for thermal regulation • LED outputs to indicate charge status and fault conditions Additional Features • “Always on” RTC with wake-up alarm • Watchdog timer • Up to 13 configurable GPIO pins • On-chip crystal oscillator and internal RC oscillator • Low power FLL supporting wide range of input clocks • 7x7mm, 129 BGA package, 0.5mm ball pitch • Portable Audio and Media players • Portable Navigation Devices • Portable systems powered by single-cell lithium batteries WOLFSON MICROELECTRONICS plc To receive regular email updates, sign up at Production Data, February 2011, Rev Copyright 2011 Wolfson Microelectronics plc WM8351 TYPICAL APPLICATIONS Production Data The WM8351 is a complete audio and power management solution for portable media devices. The device incorporates three programmable step-down switching regulators, a step-up switching regulator, a full-featured battery charger, four Low Drop-Out LDO voltage regulators which can also serve as hot-swap outputs, a backup supply regulator, a programmable white LED driver, a RealTime Clock RTC alongside a 32.768kHz 32kHz oscillator capable of operating from a backup battery, a 12-bit auxiliary ADC for precise measurements, a ROM-programmable power management state machine and numerous protection features all in a single 7x7mm BGA package. When only battery power is available, a battery switch provides power to all switching regulators and some other internal modules . When external power is applied eg. from USB or Wall adapter , the WM8351 seamlessly transitions from battery power a single-cell Lithium battery to the applicable external supply. The battery charger is then activated, all internal power for the device is drawn from the appropriate external power source and the battery is disconnected from the load. Maximum battery charge current and charge time are programmable. The USB power manager provides accurate current limiting for the USB pin under all conditions. The hot-swap outputs LDOs in currentlimited ‘Switch Mode’ operation are ideal for powering memory cards and other devices that can be inserted while the system is fully powered. The integrated Hi-Fi stereo CODEC incorporates preamps and a low-noise bias voltage for differential microphones, and flexible pseudo-differential drivers for headphone and differential/singleended line outputs. External component requirements are reduced as no separate microphone or headphone amplifiers are required. Digital filter options are available in the ADC and DAC paths, to cater for application filtering. The WM8351 is capable of operating without any external clock, as it can derive all required clocks from its internal crystal oscillator, RC clock, and Frequency Locked Loop. An external low jitter clock may be required in some applications for high performance audio. Production Data BLOCK DIAGRAM LINEINT SWVRTC *LINE_SW PV4 L4 FB4 PG4 PV3 L3 FB3 PG3 VP2 FB2 NGATE2 L2 PG2 PG1[0:1] FB1 L1[0:1] PV1[0:1] WALLFB AUX1 AUX2 AUX3 AUX4 BATT[0:2] USB[0:2] LINE[0:2] HIVDD Digital Core Supply USB OTG Supply Memory Supply Sub System Core Supply DESCRIPTION 1 APPLICATIONS TYPICAL APPLICATIONS BLOCK DIAGRAM TABLE OF CONTENTS 1 PIN CONFIGURATION 2 ORDERING INFORMATION 3 PIN 4 THERMAL CHARACTERISTICS 5 ABSOLUTE MAXIMUM RATINGS 6 RECOMMENDED OPERATING CONDITIONS 7 ELECTRICAL HI-FI AUDIO 16 DC-DC STEP UP CONVERTER ELECTRICAL CHARACTERISTICS............... 18 DC-DC STEP DOWN CONVERTER ELECTRICAL CHARACTERISTICS 19 LDO REGULATOR ELECTRICAL CHARACTERISTICS 21 BATTERY 22 CURRENT LIMIT SWITCH 22 LED DRIVERS 23 GENERAL PURPOSE INPUTS / OUTPUTS GPIO 23 DIGITAL INTERFACES 24 AUXILIARY ADC 24 8 TYPICAL POWER 9 TYPICAL PERFORMANCE AUDIO 27 DC-DC 28 POWER EFFICIENCY 28 OUTPUT VOLTAGE REGULATION 29 DYNAMIC OUTPUT VOLTAGE 30 LDO REGULATORS 31 10 SIGNAL TIMING SYSTEM CLOCK TIMING 32 AUDIO INTERFACE TIMING - MASTER MODE 32 AUDIO INTERFACE TIMING - SLAVE 33 AUDIO INTERFACE TIMING - TDM MODE 34 CONTROL INTERFACE 35 11 CONTROL INTERFACE GENERAL DESCRIPTION 38 CONTROL INTERFACE MODES 38 2-WIRE SERIAL CONTROL MODE 39 3-WIRE SERIAL CONTROL MODE 42 4-WIRE SERIAL CONTROL MODE 43 REGISTER LOCKING 44 SPECIAL REGISTERS 44 CHIP ID 44 DEVICE 44 12 CLOCKING, TIMING AND SAMPLE RATES Production Data WM8351 GENERAL DESCRIPTION 45 CLOCKING THE AUDIO CODEC 46 CLOCKING THE DC-DC CONVERTERS 46 INTERNAL RC 46 CRYSTAL 46 CLOCKING AND SAMPLE RATES 47 SYSCLK 49 ADC / DAC SAMPLE 50 BCLK CONTROL 52 ADCLRCLK / DACLRCLK CONTROL 54 OPCLK CONTROL 55 SLOWCLK CONTROL 55 FLL 55 EXAMPLE FLL CALCULATION 58 EXAMPLE FLL SETTINGS 59 13 AUDIO CODEC GENERAL DESCRIPTION 60 AUDIO PATHS 61 ENABLING THE AUDIO CODEC 62 INPUT SIGNAL PATH 64 MICROPHONE INPUTS 64 ENABLING THE PRE-AMPLIFIERS 65 SELECTING INPUT 65 CONTROLLING THE PRE-AMPLIFIER 66 MICROPHONE BIASING 67 AUXILIARY INPUTS IN3L AND 68 INPUT 69 ANALOGUE TO DIGITAL CONVERTER ADC 71 ADC VOLUME CONTROL 72 ADC HIGH-PASS 72 DIGITAL MIXING 73 DIGITAL SIDETONE 73 DIGITAL TO ANALOGUE CONVERTER DAC 74 DAC PLAYBACK VOLUME CONTROL 75 2 ORDERING INFORMATION ORDER CODE WM8351GEB/V TEMPERATURE RANGE -25°C to +85°C WM8351GEB/RV -25°C to +85°C Note Reel quantity = 2,200 PACKAGE 129-ball BGA 7 x 7 mm Pb-free 129-ball BGA 7 x 7 mm Pb-free, tape and reel MOISTURE SENSITIVITY LEVEL MSL3 MSL3 PEAK SOLDERING TEMPERATURE 260oC 260oC WM8351 3 PIN DESCRIPTION Pins are listed in alphabetical order by name. NAME LOCATION S TYPE ADCDATA Digital Output POWER DOMAIN DBVDD AUX1 Analogue Input LINE AUX2 AUX3 AUX4 AVDD BATT J13 H13 C9 M8 E1, E2, D2 Analogue Input Analogue Input Analogue Input Supply Analogue I/O LINE BCLK CREF Digital I/O DBVDD Analogue Output VRTC CONF0 CONF1 DACDATA Digital Input Digital Input Digital Input VRTC DBVDD DCVDD DBVDD

PDF Datasheet Preview

WM8351

Wolfson AudioPlus Stereo CODEC with Power Management

The WM8351 is an integrated audio and power management subsystem which provides a cost effective, single-chip solution for portable audio and multimedia systems.

The integrated audio CODEC provides all the necessary functions for high-quality stereo recording and playback. Programmable on-chip amplifiers allow for the direct connection of headphones and microphones with a minimum of external components. A programmable low-noise bias voltage is available to feed one or more electret microphones. Additional audio features include programmable high-pass filter in the ADC input path.

The WM8351 includes four programmable DC-DC converters, four low-dropout LDO regulators and a current limit switch to generate suitable supply voltages for each part of the system, including the integrated audio CODEC as well as off-chip components such as a digital core and I/O supplies, and LED lighting. An additional on-chip regulator maintains the backup power for always-on functions. The WM8351 can be powered by a lithium battery, by a wall adaptor or USB.

An on-chip battery charger supports both trickle charging and fast constant current, constant voltage charging of single-cell lithium batteries. The charge current, termination voltage, and charger time-out are programmable to suit different types of batteries.

Internal power management circuitry controls the start-up and shutdown sequencing of clocks and supply voltages. It also detects and handles conditions such as under-voltage, extreme temperatures, and deeply discharged or defective batteries, with a minimum of software involvement.

A programmable constant-current sink is available for driving LED strings, e.g. for display backlights or photo-flash applications, in a highly power-efficient way. Additional RGB LEDs can be driven through GPIO pins.

The WM8351 includes a 32.768kHz crystal oscillator, an internal RC oscillator, a real-time clock RTC and an alarm function capable of waking up the system. Internal circuitry can generate all clock signals required to start up the device.

The master clock for the audio CODEC can be input directly, or may be generated internally using an integrated, low power Frequency Locked Loop FLL .

To extend battery life, fine-grained power management enables each function in the WM8351 to be independently powered down through the control interface. The WM8351 forms part of the Wolfson AudioPlusTM series of audio and power management solutions.

Stereo Hi-Fi CODEC
• DAC SNR 95dB ‘A’ weighted 48kHz , THD
• ADC SNR 95dB ‘A’ weighted 48kHz , THD
• 40mW on-chip headphone driver with ‘capless’ option
• headphone load THD -72dB, Po = 20mW
• 2 differential microphone inputs with low-noise bias
voltage and programmable preamps
• Programmable high-pass filter for ADC
• Microphone and Headphone detection
• Auxiliary inputs for analogue signals
• Sample rates 8, 16, 24, 32, or 48kHz System Control
• Support for 2-wire or 3-/4-wire Control Interface
• Handles power sequencing, reset signals and fault
conditions
• Autonomous power source selection battery, wall adaptor
or USB bus
• Total current drawn from USB bus is limited to comply with

USB standard and USB OTG supplement Supply Generation
• 1 x DC-DC Buck Converter 0.85V - 3.4V, Up to 1A
• 2 x DC-DC Buck Converters 0.85V - 3.4V, Up to 500mA
• 1 x DC-DC Boost Converter 5V - 20V, 40 to 200mA
• 4 x LDO voltage regulators 0.9V - 3.3V, 150mA LED Drivers
• Programmable constant-current sink, suitable for screen
backlight or white LED photo flash
• 3 open-drain outputs for RGB LEDs Battery Charger
• Single-cell Li-Ion / Li-Pol battery charger
• Thermal protection for charge control temperature
monitoring available for thermal regulation
• LED outputs to indicate charge status and fault conditions Additional Features
• “Always on” RTC with wake-up alarm
• Watchdog timer
• Up to 13 configurable GPIO pins
• On-chip crystal oscillator and internal RC oscillator
• Low power FLL supporting wide range of input clocks
• 7x7mm, 129 BGA package, 0.5mm ball pitch
• Portable Audio and Media players
• Portable Navigation Devices
• Portable systems powered by single-cell lithium batteries

WOLFSON MICROELECTRONICS plc

To receive regular email updates, sign up at

Production Data, February 2011, Rev

Copyright 2011 Wolfson Microelectronics plc

WM8351 TYPICAL APPLICATIONS

Production Data

The WM8351 is a complete audio and power management solution for portable media devices. The device incorporates three programmable step-down switching regulators, a step-up switching regulator, a full-featured battery charger, four Low Drop-Out LDO voltage regulators which can also serve as hot-swap outputs, a backup supply regulator, a programmable white LED driver, a RealTime Clock RTC alongside a 32.768kHz 32kHz oscillator capable of operating from a backup battery, a 12-bit auxiliary ADC for precise measurements, a ROM-programmable power management state machine and numerous protection features all in a single 7x7mm BGA package. When only battery power is available, a battery switch provides power to all switching regulators and some other internal modules . When external power is applied eg. from USB or Wall adapter , the WM8351 seamlessly transitions from battery power a single-cell Lithium battery to the applicable external supply. The battery charger is then activated, all internal power for the device is drawn from the appropriate external power source and the battery is disconnected from the load. Maximum battery charge current and charge time are programmable. The USB power manager provides accurate current limiting for the USB pin under all conditions. The hot-swap outputs LDOs in currentlimited ‘Switch Mode’ operation are ideal for powering memory cards and other devices that can be inserted while the system is fully powered.

The integrated Hi-Fi stereo CODEC incorporates preamps and a low-noise bias voltage for differential microphones, and flexible pseudo-differential drivers for headphone and differential/singleended line outputs. External component requirements are reduced as no separate microphone or headphone amplifiers are required. Digital filter options are available in the ADC and DAC paths, to cater for application filtering. The WM8351 is capable of operating without any external clock, as it can derive all required clocks from its internal crystal oscillator, RC clock, and Frequency Locked Loop. An external low jitter clock may be required in some applications for high performance audio.

Production Data

BLOCK DIAGRAM

LINEINT SWVRTC *LINE_SW

PV4 L4

FB4 PG4

PV3 L3

FB3 PG3 VP2 FB2 NGATE2

L2 PG2 PG1[0:1] FB1 L1[0:1] PV1[0:1] WALLFB AUX1 AUX2 AUX3 AUX4

BATT[0:2] USB[0:2] LINE[0:2]

HIVDD

Digital Core Supply

USB OTG Supply

Memory Supply

Sub System Core Supply
DESCRIPTION 1 APPLICATIONS TYPICAL APPLICATIONS BLOCK DIAGRAM TABLE OF CONTENTS 1 PIN CONFIGURATION 2 ORDERING INFORMATION 3 PIN 4 THERMAL CHARACTERISTICS 5 ABSOLUTE MAXIMUM RATINGS 6 RECOMMENDED OPERATING CONDITIONS 7 ELECTRICAL

HI-FI AUDIO 16 DC-DC STEP UP CONVERTER ELECTRICAL CHARACTERISTICS............... 18 DC-DC STEP DOWN CONVERTER ELECTRICAL CHARACTERISTICS 19 LDO REGULATOR ELECTRICAL CHARACTERISTICS 21 BATTERY 22 CURRENT LIMIT SWITCH 22 LED DRIVERS 23 GENERAL PURPOSE INPUTS / OUTPUTS GPIO 23 DIGITAL INTERFACES 24 AUXILIARY ADC 24 8 TYPICAL POWER 9 TYPICAL PERFORMANCE AUDIO 27 DC-DC 28

POWER EFFICIENCY 28

OUTPUT VOLTAGE REGULATION 29

DYNAMIC OUTPUT VOLTAGE 30

LDO REGULATORS 31 10 SIGNAL TIMING

SYSTEM CLOCK TIMING 32 AUDIO INTERFACE TIMING - MASTER MODE 32 AUDIO INTERFACE TIMING - SLAVE 33 AUDIO INTERFACE TIMING - TDM MODE 34 CONTROL INTERFACE 35 11 CONTROL INTERFACE GENERAL DESCRIPTION 38 CONTROL INTERFACE MODES 38 2-WIRE SERIAL CONTROL MODE 39 3-WIRE SERIAL CONTROL MODE 42 4-WIRE SERIAL CONTROL MODE 43 REGISTER LOCKING 44 SPECIAL REGISTERS 44

CHIP ID 44

DEVICE 44
12 CLOCKING, TIMING AND SAMPLE RATES

Production Data

WM8351

GENERAL DESCRIPTION 45

CLOCKING THE AUDIO CODEC 46

CLOCKING THE DC-DC CONVERTERS 46

INTERNAL RC 46

CRYSTAL 46 CLOCKING AND SAMPLE RATES 47

SYSCLK 49

ADC / DAC SAMPLE 50

BCLK CONTROL 52

ADCLRCLK / DACLRCLK CONTROL 54

OPCLK CONTROL 55

SLOWCLK CONTROL 55

FLL 55

EXAMPLE FLL CALCULATION 58

EXAMPLE FLL SETTINGS 59
13 AUDIO CODEC GENERAL DESCRIPTION 60 AUDIO PATHS 61 ENABLING THE AUDIO CODEC 62 INPUT SIGNAL PATH 64

MICROPHONE INPUTS 64

ENABLING THE PRE-AMPLIFIERS 65

SELECTING INPUT 65

CONTROLLING THE PRE-AMPLIFIER 66

MICROPHONE BIASING 67

AUXILIARY INPUTS IN3L AND 68

INPUT 69

ANALOGUE TO DIGITAL CONVERTER ADC 71

ADC VOLUME CONTROL 72

ADC HIGH-PASS 72

DIGITAL MIXING 73

DIGITAL SIDETONE 73

DIGITAL TO ANALOGUE CONVERTER DAC 74

DAC PLAYBACK VOLUME CONTROL 75
2 ORDERING INFORMATION

ORDER CODE WM8351GEB/V

TEMPERATURE RANGE
-25°C to +85°C

WM8351GEB/RV
-25°C to +85°C

Note Reel quantity = 2,200

PACKAGE
129-ball BGA 7 x 7 mm Pb-free
129-ball BGA 7 x 7 mm Pb-free, tape and reel

MOISTURE SENSITIVITY LEVEL MSL3

MSL3

PEAK SOLDERING TEMPERATURE 260oC
260oC

WM8351 3 PIN DESCRIPTION

Pins are listed in alphabetical order by name.

NAME

LOCATION S

TYPE

ADCDATA

Digital Output

POWER DOMAIN

DBVDD

AUX1

Analogue Input LINE

AUX2 AUX3 AUX4 AVDD BATT

J13 H13 C9 M8 E1, E2, D2

Analogue Input Analogue Input Analogue Input

Supply Analogue I/O

LINE

BCLK CREF

Digital I/O

DBVDD

Analogue Output VRTC

CONF0

CONF1

DACDATA

Digital Input Digital Input Digital Input

VRTC DBVDD

DCVDD

DBVDD

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Datasheet ID: WM8351CGEB/RV 523269