WM8962 w Ultra-Low Power Stereo CODEC with Audio Enhancement DSP, 1W Stereo Class D Speaker Drivers and Ground Referenced Headphone Drivers DESCRIPTION FEATURES The WM8962 is a low power, high performance stereo CODEC DAC SNR 98dB (A weighted), THD -84dB at 48kHz, 1.8V designed for portable digital audio applications. ADC SNR 94dB (A weighted), THD -85dB at 48kHz, 1.8V An integrated charge pump provides a ground referenced output Stereo Class D Speaker Driver which removes the need for DC-blocking capacitors on the - 1W per channel into 8 BTL speakers headphone outputs, and uses the Wolfson Class-W amplifier - 2W mono into 4 BTL speakers techniques - incorporating an innovative dual-mode charge - Flexible internal switching clock pump architecture - to optimise efficiency and power Wolfson Class-W ultra-low power headphone driver consumption during playback. A DC Servo is used to reduce DC ground offsets. This improves power consumption and - Up to 31mW per channel output power at 1% THD+N minimises pops and clicks. into 16 at 1.8V - Ground Referenced Stereo class D speaker drivers provide 1W per channel into 8 loads, or 2W mono into a 4 load, with a 5V supply. Low - Low offset (+/- 1.2mV) leakage, excellent PSRR and pop/click suppression - Pop and click suppression mechanisms also allow direct battery connection to the speaker - Control sequencer for pop-minimised power-up/down supply. Flexible speaker boost settings allow speaker output - Single register write for default start-up sequence power to be maximised while minimising other analogue supply Microphone Interface currents. - Single ended four stereo analogue input Control sequences for audio path setup can be pre-loaded and - Integrated low noise MICBIAS executed by an integrated sequencer to reduce software driver development and eliminate pops and clicks via Wolfsons - Digital microphone interface SilentSwitch technology. - Programmable ALC / Limiter and Noise Gate Flexible input configuration: four stereo inputs or eight mono Programmable Audio Enhancement DSP with Presets inputs on Left or Right ADC, with a complete analogue (four - Virtual Surround Sound single-ended stereo inputs) and digital microphone interface. - HD Bass External component requirements are drastically reduced as no TM - ReTune separate microphone, speaker or headphone amplifiers are Fixed Audio Processing DSP required. Advanced on-chip digital signal processing performs automatic level control for the microphone or line input. - 3D stereo widening - 5-band Parametric EQ Stereo 24-bit sigma-delta ADCs and DACs are used with low power over-sampling digital interpolation and decimation filters - Dynamic range controller and a flexible digital audio interface. - Beep generator A programmable audio enhancement DSP is included with Two integrated PLLs enable clocking of full audio system multiple preset algorithms. Virtual Surround Sound widens the Low Power Consumption stereo speaker audio image, HD Bass enhances low - 7.7mW headphone playback TM frequencies, and ReTune flattens the frequency response of - 8.3mW analogue record mode the speaker or microphone path. A configurable DSP includes Low Supply Voltages additional functions such as 3D widening for recording, a 5-band parametric EQ and Dynamic Range Controller. - Analogue 1.7V to 2.0V (Speaker supply up to 5.5V) - Charge pump 1.7V to 2.0V Two high performance PLLs and one Frequency Locked Loop (FLL) are integrated to enable the user to clock a full audio - MIC bias amp supply 1.7V to 3.6V system. - Digital 1.62V to 2.0V The WM8962 operates at analogue supply voltages down to 2-wire I2C and 3- or 4-wire SPI serial control interface 1.7V, although the digital supplies can operate at voltages down Standard sample rates from 8kHz to 96kHz to 1.62V to save power. The speaker supply can operate at up W-CSP, 3.6x3.9mm 49-pin to 5.5V. Unused functions can be disabled using software control to save power. APPLICATIONS The WM8962 is supplied in a very small W-CSP package, ideal Portable gaming for use in hand-held and portable systems. Voice recorders Mobile multimedia Stereo DSC-Camcorder WOLFSON MICROELECTRONICS plc Production Data, March 2014, Rev 4.2 Copyright 2014 Wolfson Microelectronics plc Production Data WM8962 BLOCK DIAGRAM PD, March 2014, Rev 4.2 w 2