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PDF WM8986 Data sheet ( Hoja de datos )
| Número de pieza | WM8986 | |
| Descripción | Multimedia DAC | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de WM8986 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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WM8986
Multimedia DAC With Class D Headphone and Line Out
DESCRIPTION
FEATURES
The WM8986 is a low power, high quality, feature-rich stereo
DAC designed for portable multimedia applications that require
low power consumption and high quality audio.
The device integrates preamps for stereo differential mics, and
includes class D and class AB drivers for headphone and
differential or stereo line output. External component
requirements are reduced as no separate microphone or
headphone amplifiers are required.
Stereo DAC:
• DAC SNR 98dB, THD -86dB (‘A’ weighted @ 48kHz)
• Headphone driver with ‘capless’ option
- 40mW/channel output power into 16Ω / 3.3V AVDD2
- Class D headphone driver
- Class AB headphone / line Driver
- PSRR 70dB at 217Hz
• Stereo, mono or differential line output
Advanced DSP features include a 5-band equaliser and a digital
playback limiter. Highly flexible mixers enable many new
application features, with the option to playback any
combination of voice, line inputs and digital audio such as FM
Mic Preamps:
• Stereo differential or mono microphone interfaces
• Programmable preamp gain
• Pseudo differential inputs with common mode rejection
Radio or MP3.
Other Features:
The WM8986 digital audio interface can operate in master or • Enhanced 3-D function for improved stereo separation
slave mode, while an integrated PLL provides flexible clocking • Digital playback limiter
schemes.
• 5-band Equaliser
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• 1.71V to 3.6V digital supplies
• 4x4mm 28-lead COL QFN package
APPLICATIONS
• Portable audio player / FM radio
• Multimedia Mobile Handsets
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Pre-Production, February 2007, Rev 3.1
Copyright ©2007 Wolfson Microelectronics plc
1 page  
Pre-Production
WM8986
PIN DESCRIPTION
PIN NAME
TYPE
1 LIP
Analogue input
2 LIN
Analogue input
3 RIP
Analogue input
4 RIN
Analogue input
5 DACDAT
Digital Input
6 LRC Digital Input / Output
7
BCLK
Digital Input / Output
8 MCLK
Digital Input
9 DGND
Supply
10 DCVDD
Supply
11 DBVDD
Supply
12
CSB/GPIO1
Digital Input / Output
13 SCLK
Digital Input
14
SDIN
Digital Input / Output
15 MODE
Digital Input
16 AUXL
Analogue input
17 AUXR
Analogue input
18 OUT4
Analogue Output
19 OUT3
20 ROUT2
21 AGND2
22 LOUT2
23 AVDD2
24 VMID
25 AGND1
Analogue Output
Analogue Output
Supply
Analogue Output
Supply
Reference
Supply
26 ROUT1
27 LOUT1
28 AVDD1
Analogue Output
Analogue Output
Supply
DESCRIPTION
Left MIC pre-amp positive input
Left MIC pre-amp negative input
Right MIC pre-amp positive input
Right MIC pre-amp negative input
DAC digital audio data input
DAC sample rate clock
Digital audio bit clock
Master clock input
Digital ground
Digital core logic supply
Digital buffer (I/O) supply
3-Wire control interface chip Select / GPIO1 pin
3-Wire control interface clock input / 2-wire control interface clock input
3-Wire control interface data input / 2-Wire control interface data input
Control interface selection
Left auxiliary input
Right auxiliary input
Buffered midrail headphone pseudo-ground / right line output / mono mix
output
Buffered midrail headphone pseudo-ground or left line output
Class D or class AB headphone output right
Analogue ground (ground reference for ROUT2/LOUT2 and OUT3/OUT4)
Class D or class AB headphone output left
Analogue supply (feeds output amplifiers ROUT2/LOUT2 and OUT3/OUT4)
Decoupling for DAC reference voltage
Analogue ground (ground reference for all input amplifiers, PLL, DAC, interna
bias circuits, output amplifiers LOUT1, ROUT1)
Class AB headphone or line output right
Class AB headphone or line output left
Analogue supply (feeds all input amplifiers, PLL, DAC, internal bias circuits,
output amplifiers LOUT1, ROUT1)
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PP, Rev 3.1, February 2007
5
5 Page 
Pre-Production
WM8986
Test Conditions
DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Input / Output
Input HIGH Level
VIH
0.7×DBV
DD
V
Input LOW Level
Output HIGH Level
VIL
0.3×DBVDD
V
VOH
IOL=1mA
0.9×DBV
DD
V
Output LOW Level
Input Capacitance
VOL IOH-1mA
All digital pins
0.1xDBVDD
V
10 pF
Input leakage
11 pA
TERMINOLOGY
1. Full-scale input and output levels scale in relation to AVDD or AVDD2 depending upon the input or output used. For
example, when AVDD = 3.3V, 0dBFS = 1Vrms (0dBV). When AVDD < 3.3V the absolute level of 0dBFS will decrease
with a linear relationship to AVDD.
2. Input level to RIP and LIP in differential configurations is limited to a maximum of -3dB or performance will be
reduced.
3. Signal-to-noise ratio (dBFS) – SNR is the difference in level between a reference full scale output signal and the
device output with no signal applied. This ratio is also called idle channel noise. (No Auto-zero or Automute function is
employed in achieving these results).
4. Total Harmonic Distortion (dBFS) – THD is the difference in level between a reference full scale output signal and the
first seven odd harmonics of the output signal. To calculate the ratio, the fundamental frequency of the output signal
is notched out and an RMS value of the next seven harmonics is calculated.
5. Total Harmonic Distortion plus Noise (dBFS) – THD+N is the difference in level between a reference full scale output
signal and the sum of the harmonics, wide-band noise and interference on the output signal. To calculate the ratio,
the fundamental frequency of the output signal is notched out and an RMS value of the total harmonics, wide-band
noise and interference is calculated.
6. Channel Separation (dB) – Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
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PP, Rev 3.1, February 2007
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8986.PDF ] | |
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