DESCRIPTION

The WM8971L is a low power, high quality stereo codec designed for portable digital audio applications.

The device integrates complete interfaces to stereo or mono microphones and a stereo headphone. External component requirements are drastically reduced as no separate microphone or headphone amplifiers are required. Advanced on-chip digital signal processing performs graphic equaliser, and automatic level control for the microphone or line input.

FEATURES

• DAC SNR 98dB (‘A’ weighted), THD –84dB at 48kHz, 3.3V

• ADC SNR 95dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V

• Complete Stereo / Mono Microphone Interface

- Programmable ALC / Noise Gate

• On-chip 400mW BTL Speaker Driver (mono)

• On-chip Headphone Driver

- >40mW output power on 16Ω / 3.3V

- THD –80dB at 20mW, SNR 90dB with 16Ω load

- No DC blocking capacitors required (capless mode)

• Separately mixed mono output

• Digital Graphic Equaliser

• Low Power

- 7mW stereo playback (1.8V / 1.5V supplies)

- 14mW 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, 96kHz generated internally from master clock

• 5x5x0.9mm QFN package

APPLICATIONS

• Digital Still Cameras

• MP3 Player / Recorders

• Minidisc Player / Recorders

• Portable Digital Music Systems