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WM9081 데이터시트 PDF




Wolfson Microelectronics에서 제조한 전자 부품 WM9081은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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기능 Mono DAC
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WM9081 데이터시트, 핀배열, 회로
w
WM9081
Mono DAC with 2.6W Class AB/D Speaker Driver,
Dynamic Range Controller and ReTune Mobile Parametric Equalizer
DESCRIPTION
The WM9081 is designed to provide high power output at
low distortion levels in space-constrained portable
applications.
ReTune Mobile Parametric EQ with fully programmable
coefficients is integrated for optimization of speaker
characteristics. Programmable dynamic range control is
also available for maximizing loudness, protecting speakers
from clipping and preventing premature shutdown due to
battery droop.
Digital input enables the power drivers to be located close to
the speakers in multi-channel systems without the need for
troublesome long analogue connections. Location of the
power drivers close to the speakers also removes the need
for bulky and expensive class D filters and reduces PCB
track lengths, minimising emissions. The digital input can
also help to minimise crosstalk to the speaker output
signal from high gain microphone inputs, enhancing stability
and reducing the risk of ‘howling’ during speakerphone
operation.
Four control interface addresses and four-channel TDM are
supported to allow multiple devices to be configured and
driven independently.
The device is controlled via a standard 2-wire, 3-wire, or 4-
wire control interface or by hardware control pins.
BLOCK DIAGRAM
FEATURES
High-power, high performance DAC and speaker driver
92dB SNR (‘A-weighted’) in Class D mode
97dB SNR (‘A-weighted’) in Class AB mode
<0.05% THD+N @0.5W continuous into 4(Class D)
<0.10% THD+N @2W continuous into 4(Class D)
2.6W maximum peak power
ReTune Mobile Parametric Equalizer
Fully programmable filter coefficients
Programmable dynamic range controller
Boosts small signals to maximise loudness
Protects against battery droop and clipping
Speaker common mode boost
Maximises power for a given SPKVDD/AVDD ratio
Low power FLL
Provides all necessary internal clocks
32kHz to 27MHz input frequency
All common sample rates from 8kHz to 96kHz supported
Standard 2-wire, 3-wire, 4-wire and hardware control
modes
Data formats: LJ, RJ, I2S, DSP, all with TDM support
Thermal shutdown interrupt
4x4 COL package (0.45mm lead pitch)
Operating temperature range: -40°C to 85°C
APPLICATIONS
Portable navigation systems
Mobile phones
Flat panel TVs
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Pre-Production, April 2009, Rev 3.0
Copyright ©2009 Wolfson Microelectronics plc




WM9081 pdf, 반도체, 판매, 대치품
WM9081
PIN CONFIGURATION
COL28
Pre-Production
ORDERING INFORMATION
ORDER CODE
WM9081GICN/V
TEMPERATURE
RANGE
-40°C to +85°C
WM9081GICN/RV
-40°C to +85°C
Note:
Reel quantity = 3500
PACKAGE
28-lead COL (4x4x0.55mm)
(Pb-free)
28-lead COL (4x4x0.55mm)
(Pb-free, Tape and reel)
MOISTURE
SENSITIVITY LEVEL
MSL3
PEAK SOLDERING
TEMPERATURE
260°C
MSL3
260°C
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PP, Rev 3.0, April 2009
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WM9081 전자부품, 판매, 대치품
Pre-Production
ELECTRICAL CHARACTERISTICS
COMMON TEST CONDITIONS
Unless otherwise stated, the following test conditions apply throughout the following sections:
DCVDD = DBVDD = 1.8V, AVDD = 3.3V, SPKVDD = 5.0V
PGA gain = 0dB
ACGAIN=DCGAIN=1.52
Audio signal: 1kHz sine wave, sampled at 48kHz with 24-bit data resolution, I2S mode
Ambient temperature: TA = +25°C
CVMID = 4.7μF
VMID_SEL[1:0] = 01 (2x40k)
Additional, specific test conditions are given within the relevant sections below.
WM9081
AUDIO DAC
TERMINOLOGY
1. Signal-to-Noise Ratio (dB) – SNR is a measure of the difference in level between the maximum theoretical full scale
output signal and the output with no input signal applied.
2. Total Harmonic Distortion (dB) – THD is the level of the rms value of the sum of harmonic distortion products relative
to the amplitude of the measured output signal.
3. Total Harmonic Distortion plus Noise (dB) – THD+N is the level of the rms value of the sum of harmonic distortion
products plus noise in the specified bandwidth relative to the amplitude of the measured output signal.
4. All performance measurements carried out with 20kHz low pass filter, and where noted an A-weighted filter. Failure to
use such a filter will result in higher THD and lower SNR readings than are found in the Electrical Characteristics. The
low pass filter removes out of band noise; although it is not audible it may affect dynamic specification values.
5. Mute Attenuation – This is a measure of the difference in level between the full scale output signal and the output with
mute applied.
DAC TO SPEAKER OUTPUT
PARAMETER
TEST CONDITIONS
DAC to Speaker Output (4.1Ω + 22μH BTL Load)
SNR (A-weighted)
DAC to speaker output, class D
THD+N (PO=0.5W)
THD+N (PO=1.0W)
THD+N (PO=2.0W)
SNR (A-weighted)
DAC to speaker output, class AB
THD+N (PO=0.5W)
THD+N (PO=1.0W)
THD+N (PO=2.0W)
MIN
85
90
TYP
92
-72
-72
-68
97
-86
-86
-80
MAX
-50
-50
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
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