WM8350GEB/RV Wolfson Microelectronics, WM8350GEB/RV Datasheet
WM8350GEB/RV
Manufacturer Part Number
WM8350GEB/RV
Description
Audio CODECs Audio CODEC plus pwr management
Manufacturer
Wolfson Microelectronics
Datasheet
1.WM8350GEBRV.pdf
(340 pages)
Specifications of WM8350GEB/RV
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
WM8350GEB/RVLRG
Manufacturer:
WOLFSON
Quantity:
20 000
w
DESCRIPTION
The WM8350 is an integrated audio and power management
subsystem which provides a cost effective, single-chip solution
for portable audio and multimedia systems.
The integrated audio CODEC provides all the necessary
functions for high-quality stereo recording and playback.
Programmable
connection of headphones and microphones with a minimum
of external components. A programmable low-noise bias
voltage is available to feed one or more electret microphones.
Additional audio features include programmable high-pass
filter in the ADC input path.
The WM8350 includes six programmable DC-DC converters,
four low-dropout (LDO) regulators and a current limit switch to
generate suitable supply voltages for each part of the system,
including the integrated audio CODEC as well as off-chip
components such as a digital core and I/O supplies, and LED
lighting. An additional on-chip regulator maintains the backup
power for always-on functions. The WM8350 can be powered
by a lithium battery, by a wall adaptor or USB.
An on-chip battery charger supports both trickle charging and
fast (constant current, constant voltage) charging of single-cell
lithium batteries. The charge current, termination voltage, and
charger time-out are programmable to suit different types of
batteries.
Internal power management circuitry controls the start-up and
shutdown sequencing of clocks and supply voltages. It also
detects and handles conditions such as under-voltage,
extreme temperatures, and deeply discharged or defective
batteries, with a minimum of software involvement.
Two programmable constant-current sinks are available for
driving LED strings, e.g. for display backlights or photo-flash
applications, in a highly power-efficient way. Additional RGB
LEDs can be driven through GPIO pins.
The WM8350 includes a 32.768kHz crystal oscillator, an
internal RC oscillator, a real-time clock (RTC) and an alarm
function capable of waking up the system. Internal circuitry
can generate all clock signals required to start up the device.
The master clock for the audio CODEC can be input directly,
or may be generated internally using an integrated, low power
Frequency Locked Loop (FLL).
To extend battery life, fine-grained power management
enables each function in the WM8350 to be independently
powered down through the control interface. The WM8350
forms part of the Wolfson AudioPlus
power management solutions.
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Wolfson AudioPlus™ Stereo CODEC with Power Management
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FEATURES
Stereo Hi-Fi CODEC
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System Control
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Supply Generation
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LED Drivers
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Battery Charger
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Additional Features
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APPLICATIONS
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DAC SNR 95dB (‘A’ weighted @ 48kHz), THD –81dB
ADC SNR 95dB (‘A’ weighted @ 48kHz), THD –83dB
40mW on-chip headphone driver with ‘capless’ option
16Ω headphone load: THD -72dB, Po = 20mW
2 differential microphone inputs with low-noise bias
voltage and programmable preamps
Programmable high-pass filter for ADC
Microphone and Headphone detection
Auxiliary inputs for analogue signals
Sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1 or 48kHz
Support for 2-wire or 3-/4-wire Control Interface
Handles power sequencing, reset signals and fault
conditions
Autonomous power source selection (battery, wall adaptor
or USB bus)
Total current drawn from USB bus is limited to comply with
USB 2.0 standard and USB OTG supplement
2 x DC-DC Buck Converters (0.85V - 3.4V, Up to 1A)
2 x DC-DC Buck Converters (0.85V - 3.4V, Up to 500mA)
2 x DC-DC Boost Converters (5V - 20V, 40 to 200mA)
4 x LDO voltage regulators (0.9V - 3.3V, 150mA)
2 programmable constant-current sinks, suitable for
screen backlight or white LED photo flash
3 open-drain outputs for RGB LEDs
Single-cell Li-Ion / Li-Pol battery charger
Thermal protection for charge control; temperature
monitoring available for thermal regulation
LED outputs to indicate charge status and fault conditions
“Always on” RTC with wake-up alarm
Watchdog timer
Up to 13 configurable GPIO pins
On-chip crystal oscillator and internal RC oscillator
Low power FLL supporting wide range of input clocks
7x7mm, 129 BGA package, 0.5mm ball pitch
Portable Audio and Media players
Portable Navigation Devices
Portable systems powered by single-cell lithium batteries
Production Data, February 2011, Rev 4.4
Copyright ©2011 Wolfson Microelectronics plc
WM8350
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