WM8750BL Datasheet | Wolfson Microelectronics

DESCRIPTION The WM8750BL is a low power, high quality stereo CODEC designed for portable digital audio applications. The device integrates plete interfaces to stereo or mono microphones and a stereo headphone. External ponent requirements are drastically reduced as no separate microphone or headphone amplifiers are required. Advanced on-chip digital signal processing performs graphic equaliser, 3-D sound enhancement and automatic level control for the microphone or line input. The WM8750BL can operate as a master or a slave, with various master clock frequencies including 12 or 24MHz for USB devices, or standard 256fs rates like 12.288MHz and 24.576MHz. Different audio sample rates such as 96k Hz, 48k Hz, 44.1k Hz are generated directly from the master clock without the need for an external PLL. The WM8750BL operates at supply voltages down to 1.8V, although the digital core can operate at voltages down to 1.42V to save power, and the maximum for all supplies is 3.6 Volts. Different sections of the chip can also be powered down under software control. The WM8750BL is supplied in a very small and thin 5x5mm QFN package, ideal for use in hand-held and portable systems. BLOCK DIAGRAM FEATURES - DAC SNR 97d B (‘A’ weighted), THD -85d B at 48k Hz, 3.3V - ADC SNR 88d B (‘A’ weighted), THD -80d B at 48k Hz, 3.3V - plete Stereo / Mono Microphone Interface - Programmable ALC / Noise Gate - On-chip 400m W BTL Speaker Driver (mono) - On-chip Headphone Driver - >40m W output power on 16 / 3.3V - THD - 73d B at 5m W, SNR 98d B with 16 load - No DC blocking capacitors required (capless mode) - Separately mixed mono output - Digital Graphic Equaliser - Low Power - 6 m W stereo playback (1.8V / 1.5V supplies) - 13 m W record & playback (1.8V / 1.5V supplies) - Low Supply Voltages - Analogue 1.8V to 3.6V - Digital core: 1.42V to 3.6V - Digital I/O: 1.8V to 3.6V - 256fs / 384fs or USB master clock rates: 12MHz, 24MHz - Audio sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48, 88.2, 96k Hz...