WM8988 Datasheet | Cirrus Logic

Stereo CODEC for Portable Audio Applications DESCRIPTION The WM8988 is a low power, high quality stereo CODEC designed for portable digital audio applications. The device integrates plete interfaces to 2 stereo headphone or line out ports. External ponent requirements are drastically reduced as no separate 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 WM8988 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 WM8988 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 WM8988 is supplied in a very small and thin 4x4mm COL package, ideal for use in hand-held and portable systems. BLOCK DIAGRAM Features - DAC SNR 100d B (‘A’ weighted), THD - 90d B at 48k Hz, 3.3V - ADC SNR 93d B (‘A’ weighted), THD -81d B at 48k Hz, 3.3V - Programmable ALC / Noise Gate - 2x On-chip Headphone Drivers - >40m W output power on 16 / 3.3V - THD - 80d B at 20m W, SNR 90d B with 16 load - Digital Graphic Equaliser - Low Power - 7m W stereo playback (1.8V / 1.5V supplies) - 14m W record and 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 generated internally from master clock - 4x4mm COL package APPLICATIONS - Portable Multimedia...