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WM8750BL Datasheet(PDF) 1 Page - Wolfson Microelectronics plc

Part No. WM8750BL
Description  Stereo CODEC for Portable Audio Applications
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Maker  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
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WM8750BL Datasheet(HTML) 1 Page - Wolfson Microelectronics plc

 
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WM8750BL
Stereo CODEC for Portable Audio Applications
WOLFSON MICROELECTRONICS plc
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Pre-Production, January 2007, Rev 3.3
Copyright
2007 Wolfson Microelectronics plc
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 256fs 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.
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
Ω / 3.3V
-
THD –73dB at 5mW, SNR 98dB with 16
Ω 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
BLOCK DIAGRAM


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