WM8750BL_12 Datasheet, PDF (1/60 Pages) Wolfson Microelectronics plc – Stereo CODEC for Portable Audio Applications

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WM8750BL
Stereo CODEC for Portable Audio Applications
DESCRIPTION
The WM8750BL 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, 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 256f_s rates like 12.288MHz and
24.576MHz. Different audio sample rates such as 96kHz,
48kHz, 44.1kHz 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 97dB (‘A’ weighted), THD -85dB at 48kHz, 3.3V
 ADC SNR 88dB (‘A’ weighted), THD -80dB 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 16 / 3.3V
- THD –73dB at 5mW, SNR 98dB with 16 load
- No DC blocking capacitors required (capless mode)
 Separately mixed mono output
 Digital Graphic Equaliser
 Low Power
- 6 mW stereo playback (1.8V / 1.5V supplies)
- 13 mW 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, 96kHz generated internally from master clock
 5x5x0.9mm QFN package
APPLICATIONS
 Portable Media Player
 Mobile phone handsets
 Mobile gaming
WOLFSON MICROELECTRONICS plc
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Production Data, August 2012, Rev 4.1
Copyright 2012 Wolfson Microelectronics plc