AS3517 Datasheet | AMSCO

Description The AS3517 is a low power stereo audio codec and is designed for Portable Digital Audio Applications. It allows playback and recording in CD quality. It has a variety of audio inputs and outputs to directly connect electret microphones, 16Ω headset and auxiliary signal sources via a 10-channel mixer. It only consumes 20m W in playback mode. Further the device offers advanced power management functions. All necessary ICs and peripherals in a Digital Audio Player with flash or harddisk memory are supplied by the AS3517. The power management block generates 11 different supply voltages out of the battery supply. CPU, NAND flash, SRAM, memory cards, harddisk, LCD backlight, USB-HOST and USB-OTG can be powered. The different supply voltages are programmable via the serial control interface. AS3517 also contains a charger. The supply voltage can range from 3.0V to 5.5V. The AS3517 has an on-chip, phase locked loop (PLL) controlled, clock generator. It generates 44.1k Hz, 48k Hz and other sample rates defined in MP3, AAC, WMA, OGG VORBIS etc. No additional external crystal or PLL is needed in slave mode. Further the AS3517 has an independent 32k Hz real time clock (RTC) on chip which allows a plete power down of the system CPU. Product Brief Stereo Audio Codec with advanced System Power Management - 32 steps @1.5d B and MUTE - 2x60m W @16Ω driver capability - headphone and over-current detection - phantom ground eliminates large capacitors Audio Mixer - 10 channel input/output mixer - mixes line inputs and microphones with DAC - left and right channels independent Power Management - step down for harddisk (0.65V-3.4V, 500m A) - step down for CPUcore (0.65V-3.4V, 250m A) - step down for peripheral (0.65V-3.4V, 250m A) - charge pump for USB OTG (5V, 10m A) - step up for USB HOST/OTG (5V, 500m A) - step up for backlight (15V, 40m A), dimming - LDO for digital supply (2.9V, 200m A) - LDO for analogue supply (2.9V, 200m A) - LDO for peripherals (1.2V-3.5V, 200m A) - LDO for...