WM8962B w Ultra-Low Power Stereo CODEC with Audio Enhancement DSP, 2W Stereo Class D Speaker Drivers and Ground Referenced Headphone Drivers DESCRIPTION FEATURES The WM8962B 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 - 2W per channel into 4 BTL speakers headphone outputs, and uses the Wolfson Class-W amplifier - 2W mono (for improved THD) 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 2W per channel into 4 BTL loads, with a 5V supply. Low leakage, excellent PSRR and - Low offset (+/- 1.2mV) pop/click suppression mechanisms also allow direct battery - Pop and click suppression connection to the speaker supply. Flexible speaker boost - Control sequencer for pop-minimised power-up/down settings allow speaker output power to be maximised while - Single register write for default start-up sequence minimising other analogue supply currents. Microphone Interface Control sequences for audio path setup can be pre-loaded and - Single ended four stereo analogue input executed by an integrated sequencer to reduce software driver - Integrated low noise MICBIAS development and eliminate pops and clicks via Wolfsons SilentSwitch technology. - Digital microphone interface - Programmable ALC / Limiter and Noise Gate Flexible input configuration: four stereo inputs or eight mono inputs on Left or Right ADC, with a complete analogue (four Programmable Audio Enhancement DSP with Presets single-ended stereo inputs) and digital microphone interface. - Virtual Surround Sound External component requirements are drastically reduced as no - HD Bass separate microphone, speaker or headphone amplifiers are TM - ReTune required. Advanced on-chip digital signal processing performs Fixed Audio Processing DSP automatic level control for the microphone or line input. - 3D stereo widening Stereo 24-bit sigma-delta ADCs and DACs are used with low - 5-band Parametric EQ power over-sampling digital interpolation and decimation filters and a flexible digital audio interface. - Dynamic range controller - Beep generator A programmable audio enhancement DSP is included with multiple preset algorithms. Virtual Surround Sound widens the Two integrated PLLs enable clocking of full audio system stereo speaker audio image, HD Bass enhances low Low Power Consumption TM frequencies, and ReTune flattens the frequency response of - 7.7mW headphone playback the speaker or microphone path. A configurable DSP includes - 8.3mW analogue record mode additional functions such as 3D widening for recording, a 5-band Low Supply Voltages parametric EQ and Dynamic Range Controller. - Analogue 1.7V to 2.0V (Speaker supply up to 5.5V) Two high performance PLLs and one Frequency Locked Loop - Charge pump 1.7V to 2.0V (FLL) are integrated to enable the user to clock a full audio system. - MIC bias amp supply 1.7V to 3.6V - Digital 1.62V to 2.0V The WM8962B operates at analogue supply voltages down to 1.7V, although the digital supplies can operate at voltages down 2-wire I2C and 3- or 4-wire SPI serial control interface to 1.62V to save power. The speaker supply can operate at up Standard sample rates from 8kHz to 96kHz to 5.5V. Unused functions can be disabled using software W-CSP, 3.6x3.9mm 49-pin control to save power. APPLICATIONS The WM8962B is supplied in a very small W-CSP package, ideal for use in hand-held and portable systems. Portable gaming Voice recorders Mobile multimedia Stereo DSC-Camcorder WOLFSON MICROELECTRONICS plc Production Data, April 2013, Rev 4.1 Copyright 2013 Wolfson Microelectronics plc Production Data WM8962B BLOCK DIAGRAM PD, April 2013, Rev 4.1 w 2