WM8995L Datasheet PDF - Wolfson Microelectronics
| Part Number | WM8995L | |
| Description | Tereo DAC | |
| Manufacturers | Wolfson Microelectronics | |
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WM8955L
Stereo DAC For Portable Audio Applications
DESCRIPTION
FEATURES
The WM8955L is a low power, high quality stereo DAC with
integrated headphone and loudspeaker amplifiers, designed to
reduce external component requirements in portable digital
audio applications.
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The on-chip headphone amplifiers can deliver 40mW into a 16Ω
load. Advanced on-chip digital signal processing performs bass
and treble tone control.
The WM8955L can operate as a master or a slave, and
includes an on-chip PLL. It can use most master clock
frequencies commonly found in portable systems, including
USB, GSM, CDMA or PDC clocks, or standard 256fs clock
rates. Different audio sample rates such as 48kHz, 44.1kHz,
8kHz and many others are supported.
The WM8955L operates on supply voltages from 1.8V up to
3.6V, although the digital core can operate on a separate supply
down to 1.42V, saving power. Different sections of the chip can
also be powered down under software control.
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DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz, 3.3V)
On-chip 400mW BTL Speaker Driver (mono)
On-chip Headphone Driver
- 40mW output power on 16Ω / 3.3V
- SNR 96dB, THD –79dB at 20mW with 16Ω load
Stereo and Mono Line-in mix into DAC output
Separately Mixed Stereo and Mono Outputs
Digital Tone Control and Bass Boost
Low Power
- Down to 7mW for stereo playback (1.8V / 1.5V supplies)
- 10µW Shutdown Mode
Low Supply Voltages
- Analogue and Digital I/O: 1.8V to 3.6V
- Digital core: 1.42V to 3.6V
Master clocks supported: GSM, CDMA, PDC, USB or
standard audio clocks
Audio sample rates supported: 8, 11.025, 12, 16, 22.05, 24,
32, 44.1, 48, 88.2, 96kHz
32-lead QFN package, 5x5x0.9mm size, 0.5mm lead pitch
The WM8955L is supplied in a very small and thin 5x5mm QFN
package, ideal for use in hand-held and portable systems.
APPLICATIONS
• Smartphone / Multimedia Phone
• Digital Audio Player
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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Production Data, March 2006, Rev 4.2
Copyright 2006 Wolfson Microelectronics plc
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Production Data
WM8955L
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously
operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given
under Electrical Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically
susceptible to damage from excessive static voltages. Proper ESD precautions must be taken during handling
and storage of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
Supply voltages
Voltage range digital inputs
Voltage range analogue inputs
Operating temperature range, TA
Storage temperature after soldering
MIN
-0.3V
DGND -0.3V
AGND -0.3V
-25°C
-65°C
Notes
1. Analogue and digital grounds must always be within 0.3V of each other.
2. All digital and analogue supplies are completely independent from each other.
MAX
+4.5V
DBVDD +0.3V
AVDD +0.3V
+85°C
+150°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range (Core)
Digital supply range (Buffer)
Analogue supplies range
Ground
SYMBOL
DCVDD
DBVDD
AVDD, HPVDD
DGND, AGND, HPGND
TEST CONDITIONS
MIN
1.42
1.71
1.8
TYP
0
MAX
3.6
3.6
3.6
UNIT
V
V
V
V
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PD Rev 4.2 March 2006
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for WM8995L electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ WM8995L.PDF Datasheet ] | |
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