DESCRIPTION
The WM8720 is a high performance stereo DAC designed for audio applications such as CD, DVD, home theatre systems, set top boxes and digital TV. The WM8720 supports data input word lengths from 16 to 24-bits and sampling rates up to 96kHz. The WM8720 consists of a serial interface port, digital interpolation filter, multi-bit sigma delta modulator and stereo DAC in a small 20-pin SSOP package. The WM8720 also includes a digitally controllable mute and attenuator function on each channel.
The WM8720 supports a variety of connection schemes for audio DAC control. The SPI-compatible serial control port provides access to a wide range of features including onchip mute, attenuation and phase reversal. A hardware controllable interface is also available.
The programmable data input port supports a variety of glueless interfaces to popular DSPs, audio decoders and S/PDIF and AES/EBU receivers.

FEATURES
*Performance
- 102dB SNR (‘A’ weighted @48kHz),
- THD: -95dB @ 0dB FS
*5V or 3.3V supply operation
*Sampling frequency: 8kHz to 96kHz
*Input data word: 16 to 24-bit
*Hardware or SPI compatible serial port control modes
- Hardware mode: system clock, reset, mute, de-emphasis
- Serial control mode: mute, de-emphasis, digital attenuation (256 steps), zero mute, phase reversal, power down

APPLICATIONS
*CD, DVD audio
*Home theatre systems
*Set top boxes
*Digital TV

WM8720EDS, WM8720EDS/R, WM8720SEDS, WM8720SEDS/R

DESCRIPTION
The WM9713L is a highly integrated input/output device designed for mobile computing and communications.
The chip is architected for dual CODEC operation, supporting Hi-Fi stereo Codec functions via the AC link interface, and additionally supporting voice Codec functions via a PCM type Synchronous Serial Port (SSP). A third, auxiliary DAC is provided which may be used to support generation of supervisory tones, or ring-tones at different sample rates to the main codec.
The device can connect directly to a 4-wire or 5-wire touchpanel, mono or stereo microphones, stereo headphones and a stereo speaker, reducing total component count in the system. Cap-less connections to the headphones, speakers, and earpiece may be used, saving cost and board area. Additionally, multiple analog input and output pins are provided for seamless integration with analog connected wireless communication devices.
All device functions are accessed and controlled through a single AC-Link interface compliant with the AC’97 standard. The 24.576 MHz masterclock can be input directly or generated internally from a 13MHz (or other frequency) clock by an on-chip PLL. The PLL supports a wide range of input clock from 2.048MHz to 78.6MHz.
The WM9713L operates at supply voltages from 1.8V to 3.6V. Each section of the chip can be powered down under software control to save power. The device is available in a small leadless 7x7mm QFN package, ideal for use in hand-held portable systems.

FEATURES
*AC’97 Rev 2.2 compatible stereo codec
-DAC SNR 94dB, THD –85dB
-ADC SNR 87dB, THD –86dB
-Variable Rate Audio, supports all WinCE sample rates
-Tone Control, Bass Boost and 3D Enhancement
*On-chip 45mW headphone driver
*On-chip 400mW mono or stereo speaker drivers
*Stereo, mono or differential microphone input
-Automatic Level Control (ALC)
-Mic insert and mic button press detection
*Auxiliary mono DAC (ring tone or DC level generation)
*Seamless interface to wireless chipset
*Resistive touchpanel interface
-Supports 4-wire and 5-wire panels
-12-bit resolution, INL ±2 LSBs (<0.5 pixels)
-X, Y and touch-pressure (Z) measurement
-Pen-down detection supported in Sleep Mode
*Additional PCM/I2S interface to support voice CODEC
*PLL derived audio clocks.
*Supports input clock ranging from 2.048MHz to 78.6MHz
*1.8V to 3.6V supplies (digital down to 1.62V, speaker up to 4.2V)
*7x7mm 48-lead QFN package

APPLICATIONS
*Personal Digital Assistants (PDA) with or without phone
*Smartphones
*Handheld and Tablet Computers

WM9713LGEFL/V, WM9713LGEFL/RV

DESCRIPTION
The WM8146 is a 12-bit analogue front end/digitiser IC, which processes and digitises the analogue output signals from linear CCD sensors at pixel sample rates of up to 6MSPS.
The device includes three analogue signal processing channels each of which contains Reset Level Clamping, Correlated Double Sampling and Programmable Gain and Offset adjust functions. The output from each of these channels is time multiplexed into a single high-speed 12-bit Analogue to Digital Converter. The digital output data is available in 8+4-bit wide multiplexed format, with no missing codes.
The WM8146 is controlled via a configurable serial interface, which is compatible with all of Wolfson’s imaging devices.
Powered from an analogue supply voltage of 5V and a digital interface supply of either 5V or 3.3V, the WM8146 typically only consumes 175mW when operating from 5V supplies.

FEATURES
*No missing codes guaranteed
*6MSPS sample rate
*Colour pixel by pixel or line by line sampling
*Monochrome sampling
*Selectable reset level clamp voltage
*Pixel by pixel or line by line clamping
*Correlated double sampling
*5-bit programmable gain amplifier
*8-bit + sign offset adjustment
*5V or 3.3V digital interface compatibility
*Serial control interface
*28-pin SOIC package

APPLICATIONS
*Flatbed scanners
*Multi-function peripherals
*Copier scanners
*CCD sensor interfaces

XWM8146CDW/V

DESCRIPTION
The WM8956 is a low power, high quality stereo DAC designed for portable multimedia applications.
Stereo class D speaker drivers provide 1W per channel into 8Ω loads with a 5V supply. Low leakage, excellent PSRR and pop/click suppression mechanisms also allow direct battery connection to the speaker supply. Flexible speaker boost settings allow speaker output power to be maximised while minimising other analogue supply currents.
A highly flexible input configuration for up to three stereo sources is integrated, with a complete microphone interface. External component requirements are drastically reduced as no separate microphone, speaker or headphone amplifiers are required.
Stereo 24-bit sigma-delta DACs are used with low power oversampling digital interpolation filters and a flexible digital audio interface.
The master clock can be input directly or generated internally by an onboard PLL, supporting most commonly-used clocking schemes.
The WM8956 operates at analogue supply voltages down to 2.7V, although the digital supplies can operate at voltages down to 1.71V to save power. The speaker supply can operate at up to 5.5V, providing 1W per channel into 8Ω loads. Unused functions can be disabled using software control to save power.
The WM8956 is supplied in a very small and thin 5x5mm QFN package, ideal for use in hand-held and portable systems.

FEATURES
*DAC SNR 98dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
*Pop and click suppression
*3D Enhancement
*Stereo Class D Speaker Driver
-<0.1% THD with 1W per channel into 8Ω BTL speakers
-70dB PSRR @217Hz
-87% efficiency (1W output)
-Flexible internal switching clock
*On-chip Headphone Driver
-40mW output power into 16Ω at 3.3V
-Capless mode support
-THD -75dB at 20mW, SNR 90dB with 16Ω load
*Microphone Interface
-Pseudo differential for high noise immunity
-Integrated low noise MICBIAS
*Low Power Consumption
-10mW headphone playback (2.7V / 1.8V supplies)
*Low Supply Voltages
-Analogue 2.7V to 3.6V (Speaker supply up to 5.5V)
-Digital core and I/O: 1.71V to 3.6V
*On-chip PLL provides flexible clocking scheme
*Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48
*5x5x0.9mm QFN package

APPLICATIONS
*Mobile multimedia
*Portable media / DVD players
*Games consoles

DESCRIPTION
The WM9715L is a highly integrated input / output device designed for mobile computing and communications. The device can connect directly to a 4-wire or 5-wire touchpanel, mono or stereo microphones, stereo headphones and a mono speaker, reducing total component count in the system. Additionally, phone input and output pins are provided for seamless integration with wireless communication devices.
The WM9715L also offers up to four auxiliary ADC inputs for analogue measurements such as temperature or light. To monitor the battery voltage in portable systems, the WM9715L has two uncommitted comparator inputs.
All device functions are accessed and controlled through a single AC-Link interface compatible with the AC’97 standard (rev 2.2). Additionally, the WM9715L can generate interrupts to indicate pen down, pen up, availability of touchpanel data, low battery, and dead battery.
The WM9715L operates at supply voltages from 1.8 to 3.6 Volts. Each section of the chip can be powered down under software control to save power. The device is available in a small leadless 7x7mm QFN package, ideal for use in handheld portable systems.

FEATURES
*AC’97 Rev 2.2 compatible stereo codec
-DAC SNR 90dB, THD –86dB
-ADC SNR 88dB, THD –88dB
-Variable Rate Audio, supports all WinCE sample rates
-Tone Control, Bass Boost and 3D Enhancement
*On-chip 45mW headphone driver
*On-chip 400mW mono speaker driver
*Stereo, mono or differential microphone input
-Automatic Level Control (ALC)
*Auxiliary mono DAC (ring tone or DC level generation)
*Seamless interface to wireless chipset
*Resistive touchpanel interface
-Supports 4-wire and 5-wire panels
-12-bit resolution, INL ±3 LSBs (<0.5 pixels)
-X, Y and touch-pressure (Z) measurement
-Pen-down detection supported in Sleep Mode
*2 comparator inputs for battery monitoring
*Up to 4 auxiliary ADC inputs
*1.8V to 3.6V supplies
*7x7mm QFN

APPLICATIONS
*Personal Digital Assistants (PDA)
*Smartphones
*Handheld and Tablet Computers

WM9715LGEFL/V, WM9715LGEFL/RV, WM9715LGEFL, WM9715LGEFLV

DESCRIPTION
The WM8991 is a highly integrated ultra-low power hi-fi codec designed for handsets rich in multimedia features such as mobile TV, digital audio playback and gaming. Ultra-low power and low noise interfaces to many other audio components in the system are provided.
A powerful 1W speaker driver can operate in class D or AB modes, providing total flexibility to the system designer. Low leakage, high PSRR and pop/click suppression enable direct battery connection for the speaker supply.
A very highly flexible input configuration supports multiple microphone or line inputs (mono or stereo, single-ended or differential).
Four headphone drivers support fully differential headset drive, providing excellent crosstalk performance and bass response, maximising stereo effects, and allowing the removal of large
and expensive headphone capacitors.
Stereo 24-bit sigma-delta ADCs and DACs provide hi-fi quality audio record and playback, with a flexible digital audio interface supporting most commonly-used clocking schemes. An integrated low power PLL, an alternative DAC interface and TDM support provide additional flexibility.
The WM8991 is supplied in very small and thin 5x5mm 65-ball BGA package, ideal for use in portable systems.

FEATURES
*DAC SNR 99dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
*ADC SNR 94dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
*Microphone interface (Up to four differential microphones)
*1W Speaker driver
- 1W into 8Ω BTL speaker at <0.1% THD
- 80dB PSRR @217Hz
- <1uA leakage with direct battery connection
- Software-selectable class D or AB mode
- Filterless connection supported
- Pop/Click suppression
*Headphone / ear speaker drivers
- 40mW output power into 16Ω at 3.3V
- Fully differential and capless modes supported
- Pop/Click suppression
*4 Mono or stereo differential line outputs
*Powerful GPIO functions
*Ultra-low power consumption
- 8.3mW analogue voice call
- 13.7mW DAC playback to headphones
*On-chip PLL provides flexible clocking scheme
*Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
*65-ball 5x5mm BGA package

APPLICATIONS
*Multimedia phones
*GPS

WM8991GEB/V, WM8991GEB/RV

DESCRIPTION
The WM8951L is a low power stereo ADC with an integrated microphone interface and crystal oscillator for clock generation. The WM8951L is ideal for voice recorders, wireless microphones and games console accessories.
Stereo line and mono microphone level audio inputs are provided, along with a mute function, programmable line level volume control and a bias voltage output suitable for an electret type microphone.
Stereo 24-bit multi-bit sigma delta ADCs are used with oversampling decimation filters. Digital audio input word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported.
The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes and extensive power management facilities. The device is available in a small 28 lead 5x5mm quad flat leadless package (QFN).

FEATURES
*Audio Performance
- ADC SNR 90dB (‘A’ weighted) at 3.3V, 85dB at 1.8V
- Low Power
- 1.42 – 3.6V Digital Supply Operation
- 1.8 – 3.6V Analogue Supply Operation
*Sampling Frequency: 8kHz – 96kHz
*Selectable ADC High Pass Filter
*2 or 3-Wire MPU Serial Control Interface
*Programmable Audio Data Interface Modes
- I2S, Left, Right Justified or DSP
- 16/20/24/32 bit Word Lengths
- Master or Slave Clocking Mode
*Microphone Input and Electret Bias with Side Tone Mixer
*Available in 5x5mm 28-lead QFN package

APPLICATIONS
*Wireless microphones
*Voice recorders
*Games console accessories

WM8951LGEFL, WM8951LGEFL/R

DESCRIPTION
The WM8959 is an ultra-low power hi-fi DAC designed for multimedia handsets.
A powerful 1W speaker driver can operate in class D or AB modes, providing total flexibility to the system designer. Low leakage, high PSRR and pop/click suppression enable direct battery connection for the speaker supply.
A flexible input configuration supports two microphone inputs (single-ended or differential), a stereo line input, and a mono differential line input.
Four headphone drivers support fully differential headset drive, providing excellent crosstalk performance and bass response, maximising stereo effects, and allowing the removal of large and expensive headphone capacitors. The headphone outputs can also be configured to drive an ear speaker. A fully differential path to these outputs direct from the input pins is available to maximise signal quality and minimise power consumption.
Stereo 24-bit sigma-delta DACs provide hi-fi quality audio playback, with a flexible digital audio interface supporting most commonly-used clocking schemes. An integrated low power PLL provides additional flexibility.
The WM8959 is supplied in very small and thin 42-ball WCSP package, ideal for portable systems.

FEATURES
*DAC SNR 99dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
*Stereo microphone interface
*1W Speaker driver
- 1W into 8Ω BTL speaker at <0.1% THD
- 80dB PSRR @ 217Hz
- <1uA leakage with direct battery connection
- Software-selectable class D or AB mode
- Filterless connection supported
*Headphone / ear speaker drivers
- 40mW output power into 16Ω at 3.3V
- Fully differential and capless modes supported
- Low noise, lower power received voice path
*Stereo or Mono differential line output
*Pop/Click suppression
*Powerful GPIO functions
*Ultra-low power consumption
- 8.3mW analogue voice call
- 13.7mW DAC playback to headphones
*On-chip PLL provides flexible clocking scheme
*Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48kHz
*42-ball WCSP package (3.226x3.44x0.7mm, 0.5mm pitch)

APPLICATIONS
*Multimedia phones
*GPS

WM8959ECS/RV

DESCRIPTION
The WM8706 is a high performance stereo DAC designed for audio applications such as DVD, home theatre systems, and digital TV.
The WM8706 supports data input word lengths from 16 to 32-bits and sampling rates up to 192kHz.
The WM8706 can implement 2 channels at 192kHz for highend DVD-Audio.
The WM8706 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a small 28-pin SSOP package.
The WM8706 also includes a digitally controllable mute and attenuate function on each channel.
The WM8706 supports a variety of connection schemes for audio DAC control.
The MPU serial port provides access to a wide range of features including on-chip mute, attenuation and phase reversal.
A hardware controllable interface is also available.
It is pin-compatible with the WM8716 provided the oscillator circuit on WM8716 is not required in the application.
The WM8706 is an ideal device to interface to AC-3, DTS , and MPEG audio decoders for surround sound applications, or for use in DVD players supporting DVD-A.

FEATURES
*Stereo DAC
*Audio Performance
-106dB SNR (‘A’ weighted @ 48kHz) DAC
- -97dB THD
*DAC Sampling Frequency: 8kHz – 192kHz
*3-Wire Serial Control Interface or Hardware Control
*Programmable Audio Data Interface Modes
-I2S, Left, Right Justified, DSP
-16/20/24/32 bit Word Lengths
*Independent Digital Volume Control on Each Channel with 127.5dB Range in 0.5dB Steps
*3.0V – 5.5V Supply Operation
*28-Pin SSOP Package
*Exceeds Dolby Class A Performance Requirements

APPLICATIONS
*DVD-Audio and DVD ‘Universal’ Players
*Home theatre systems
*Digital TV
*Digital broadcast receivers

XWM8706EDS

DESCRIPTION
The WM8741 is a very high performance stereo DAC designed for audio applications such as professional recording systems, A/V receivers and high specification CD, DVD and home theatre systems. The device supports PCM data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8741 also supports DSD bitstream data format, in both direct DSD and PCM-converted DSD modes.
The WM8741 includes fine resolution volume and soft mute control, digital de-emphasis and a range of advanced digital filter responses, followed by a digital interpolation filter, multi-bit sigma delta modulator and stereo DAC. Wolfson’s patented architecture optimises the linearity of the DAC and provides maximum insensitivity to clock jitter.
The digital filters include several selectable roll-off and performance characteristics. The user can select between standard sharp or slow roll-off responses. In addition, the WM8741 includes a selection of advanced digital filter characteristics including non-half band filters and minimum phase filters. This flexibility provides a range of benefits, such as significantly reduced pre-ringing and minimal group delay. The internal digital filters can also be by-passed and the WM8741 used with an external digital filter.
The WM8741 supports two connection schemes for audio DAC control. The 2/3 wire serial control interface provides access to all features. A range of features can also be accessed by hardware control interface.
The WM8741 is available in a convenient 28-SSOP package, and is pin compatible with the WM8740.

FEATURES
• Advanced Ultra High Performance Multi-bit Sigma-Delta Architecture
− 128dB SNR (‘A’-weighted mono @ 48kHz)
− 125dB SNR (‘A’-weighted stereo @ 48kHz)
− 123dB SNR (non-weighted stereo @ 48kHz)
− -100dB THD @ 48kHz
− Differential analogue voltage outputs
− High tolerance to clock jitter
• PCM Mode
− Sampling frequency: 32kHz to 192kHz
− Input data word length support: 16 to 32-bit
− Supports all standard audio interface formats
− Selectable advanced digital filter responses
− Includes linear/minimum phase and range of tailored characteristics
− Enables low pre-ringing, minimal latency
− Optional interface to industry standard external filters
− Digital volume control in 0.125dB steps with soft ramp and soft mute
− Anti-clipping mode to prevent distortion even with input signals recorded up to 0dB
− Selectable de-emphasis support
− Zero Flag output
• DSD Mode
− DSD bit-stream support for SACD applications
− Support for normal or phase modulated bit-streams
− Direct or PCM converted DSD paths (DSD Plus)
− DSD mute
• Hardware or software control modes:
− 2 and 3 wire serial control interface support
• Pin compatible with WM8740
• 4.5V to 5.5V analogue, 3.0V to 3.6V digital supply operation
• 28-lead SSOP Package

APPLICATIONS
• Professional audio systems
• CD, DVD, SACD audio
• Home theatre systems
• A/V receivers

WM8741GEDS