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  

WM8951L - Stereo ADC with Microphone Input and Clock Generator

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  

WM8959 - Mobile Multimedia DAC with Dual-Mode Class AB/D Speaker Driver

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  

WM8706 - 24-bit, 192kHz Stereo DAC with Volume Control

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  

WM8741 - 24-bit 192kHz DAC with Advanced Digital Filtering

DESCRIPTION
The WM8580 is a multi-channel audio CODEC with S/PDIF transceiver. The WM8580 is ideal for DVD and surround sound processing applications for home hi-fi, automotive and other audiovisual equipment.
Integrated into the device is a stereo 24-bit multi-bit sigma delta ADC with support for digital audio output word lengths from 16-bit to 32-bit, and sampling rates from 8kHz to 192kHz.
Also included are three stereo 24-bit multi-bit sigma delta DACs, each with a dedicated oversampling digital interpolation filter. Digital audio input word lengths from 16- bits to 32-bits and sampling rates from 8kHz to 192kHz are supported. Each DAC channel has independent digital volume and mute control.
Two independent audio data interfaces support I2S, Left Justified, Right Justified and DSP digital audio formats.
Each audio interface can operate in either Master Mode or Slave Mode.
The S/PDIF transceiver is IEC-60958-3 compatible and supports frame rates from 32k/s to 96k/s. It has four multiplexed inputs and one output. Status and error monitoring is built-in and results can reported over the serial interface or via GPO pins. S/PDIF Channel Block configuration is also supported.
The device has two PLLs that can be configured independently to generate two system clocks for internal or external use.
Device control and setup is via a 2-wire or 3-wire (SPI compatible) serial interface. The serial interface provides access to all features including channel selection, volume controls, mutes, de-emphasis, S/PDIF control/status, and power management facilities. Alternatively, the device has a Hardware Control Mode where device features can be enabled/disabled using selected pins.
The device is available in a 48-lead TQFP package.

FEATURES
• Multi-channel CODEC with 3 Stereo DACs and 1 Stereo ADC
• Integrated S/PDIF / IEC-60958-3 transceiver
• Audio Performance
− 103dB SNR (‘A’ weighted @ 48kHz) DAC
− -90dB THD (48kHz) DAC
− 100dB SNR (‘A’ weighted @ 48kHz) ADC
− -87dB THD (48kHz) ADC
• DAC Sampling Frequency: 8kHz – 192kHz
• ADC Sampling Frequency: 8kHz – 192kHz
• Independent ADC and DAC Sample Rates
• 2 and 3-Wire Serial Control Interface with readback, or
Hardware Control Interface
• GPO pins allow visibility of user selected status flags
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• Three Independent Stereo DAC Outputs with Digital
Volume Controls
• Two Independent Master or Slave Audio Data Interfaces
• Flexible Digital Interface Routing with Clock Selection Control
• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital Supply Operation
• 48-lead TQFP Package

APPLICATIONS
• Digital TV
• DVD Players and Receivers
• Surround Sound AV Processors and Hi-Fi systems
• Automotive Audio

WM8580AGEFT/V
WM8580AGEFT/RV  

WM8580 - Multichannel CODEC with S/PDIF Transceiver