NAU8401YG Nuvoton

NAU8401 24-bit Stereo Audio DAC with Speaker Driver emPowerAudio Description The NAU8401 is a low power, high quality audio output system for portable applications. In addition to precision 24-bit stereo DACs, this device integrates a broad range of additional functions to simplify implementation of complete audio systems. The NAU8401 includes drivers for speaker, headphone, and stereo line outputs, and integrates mixing of the DAC outputs with analog input signals. Advanced on-chip digital signal processing includes a 5-band equalizer, a 3-D audio enhancer, and a digital limiter/dynamic range compressor function for the playback path. The digital interface can operate as either a master or a slave. Additionally, an internal fractional-N PLL is available to generate accurate audio sample rate clocks for the DAC derived from any available system clock from 8MHz through 33MHz. The NAU8401 operates with analog supply voltages from 2.5V to 3.6V, while the digital core can operate as low as 1.7V to reduce power. The loudspeaker BTL output pair and two auxiliary line outputs can use a 5V supply to increase output power capability, enabling the NAU8401 to drive 1 Watt into an external speaker. Internal control registers enable flexible power conserving modes, shutting down sub-sections of the chip under software control. The NAU8401 is specified for operation from -40C to +85C. AEC-Q100 & TS16949 compliant device is available upon request. Key Features DAC: 94dB SNR and -84dB THD (A weighted) Integrated BTL speaker driver: 1W into 8 Integrated head-phone driver: 40mW into 16 Integrated line inputs and line outputs On-chip high resolution fractional-N PLL Integrated DSP with specific functions: 5-band equalizer 3-D audio enhancement Automatic level control Audio level limiter/dynamic range compressor 2 Standard audio interfaces: PCM and I S Serial control interfaces with read/write capability Supports audio sample rates from 8kHz to 48kHz Applications Personal Navigation Devices Personal Media Players Personal Navigation Devices Portable Game Players Portable TVs Datasheet Rev 2.5 Page 1 of 69 March, 2014 NAU8401 NAU8401 YG Headphones/ LINPUT Line drivers RINPUT AUXOUT2 AUXOUT1 Limiter/ LDAC 5-Band 3D Audio Dynamic Stereo Effects Range LHP Equalizer Compressor Output RDAC Mixer RHP BTL Speaker Serial Control Interface LSPKOUT Digital Audio Interface 2 I S PCM RSPKOUT GPIO PLL 2-wire SPI Pinout n/c 1 24 VSSSPK 1 24 n/c 2 23 RSPKOUT 23 3 GPIO2 22 AUXOUT2 3 22 NAU8401YG 4 21 n/c 4 21 AUXOUT1 32-lead QFN n/c 5 20 5 20 RINPUT RoHS GPIO3 6 19 LINPUT 6 19 FS 7 18 MODE 7 18 8 BCLK 17 SDIO 8 17 Package Part Number Dimension Package Material 5 x 5 mm 32-QFN Pb-Free NAU8401YG Datasheet Rev 2.5 Page 2 of 69 March, 2014 9 n/c 9 3322 PRGREF 10 DACIN 10 3311 VDDA MCLK 1111 3300 LHP VSSD 1122 2299 RHP 13 VDDC 13 2288 VSSA 14 VDDB 14 2277 VREF CSB/GPIO1 1155 2266 VDDSPK SCLK 1166 2255 LSPKOUT