|
|
PDF WM8782A Data sheet ( Hoja de datos )
| Número de pieza | WM8782A | |
| Descripción | Stereo ADC | |
| Fabricantes | Wolfson Microelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de WM8782A (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
w
24-Bit, 192kHz Stereo ADC
WM8782A
DESCRIPTION
The WM8782A is a high performance, low cost stereo
audio ADC designed for recordable media applications.
The device offers stereo line level inputs along with two
control input pins (FORMAT, IWL) to allow operation of the
audio interface in three industry standard modes. An
internal op-amp is integrated on the front end of the chip to
accommodate analogue input signals greater than 1Vrms.
The device also has a high pass filter to remove residual
DC offsets.
WM8782A offers a Slave mode clocking scheme. A stereo
24-bit multi-bit sigma-delta ADC is used with 128x, 64x or
32x over-sampling, according to sample rate. Digital audio
output word lengths from 16-24 bits and sampling rates
from 8kHz to 192kHz are supported.
The device is a hardware controlled device and is supplied
in a 20-lead SSOP.
The device is available over a functional temperature range of
-40°C to +85°C
BLOCK DIAGRAM
FEATURES
• SNR 100dB (‘A’ weighted @ 48kHz)
• THD -93dB (at –1dB)
• Sampling Frequency: 8 – 192kHz
• Slave Clocking Mode
• System Clock (MCLK): 128fs, 192fs, 256fs, 384fs, 512fs,
768fs
• Audio Data Interface Modes
- 16-24 bit I2S, 16-24 bit Left, 16-24 bit Right Justified
• Supply Voltages
- Analogue: 2.7 to 5.5V
- Digital core: 2.7V to 3.6V
• 20-lead SSOP package
• Accelerated Lifetime Screened Devices available.
APPLICATIONS
• Recordable DVD Players
• Personal Video Recorders
• STB
• Studio Audio Processing Equipment
• Automotive
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews
Production Data, April 2010, Rev 4.8
Copyright ©2010 Wolfson Microelectronics plc
1 page  
Production Data
WM8782A
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 is specified in Ordering Information.
CONDITION
Digital supply voltage
Analogue supply voltage
Voltage range digital inputs
Voltage range analogue inputs
Ambient temperature (supplies applied)
Storage temperature
Pb free package body temperature (reflow 10 seconds)
Package body temperature (soldering 2 minutes)
Notes:
1. Analogue and digital grounds must always be within 0.3V of each other.
MIN
-0.3V
-0.3V
DGND -0.3V
AGND -0.3V
-55°C
-65°C
MAX
+4.5V
+7V
DVDD + 0.3V
AVDD +0.3V
+125°C
+150°C
+260°C
+183°C
THERMAL PERFORMANCE
PARAMETER
Thermal resistance – junction to
ambient
SYMBOL
RθJA
TEST CONDITIONS
MIN TYP
81
See note 1
MAX
Notes:
1. Figure given for package mounted on 4-layer FR4 according to JESD51-7. (No forced air flow is assumed).
2. Thermal performance figures are estimated.
UNIT
°C/W
w
PD, April 2010, Rev 4.8
5
5 Page 
Production Data
DIGITAL AUDIO INTERFACE
The digital audio interface uses three pins:
• DOUT: ADC data output
• LRCLK: ADC data alignment clock
• BCLK: Bit clock, for synchronisation
WM8782A
The digital audio interface takes the data from the internal ADC digital filters and places it on DOUT
and LRCLK. DOUT is the formatted digital audio data stream output from the ADC digital filters with
left and right channels multiplexed together. LRCLK is an alignment clock that controls whether Left
or Right channel data is present on the DOUT line. DOUT and LRCLK are synchronous with the
BCLK signal with each data bit transition signified by a BCLK high to low transition. DOUT is always
an output. BCLK and LRCLK are always inputs.
Three different audio data formats are supported:
• Left justified
• Right justified
• I2S
SLAVE MODE OPERATION
The WM8782A can be configured as a slave mode device. In slave mode, the WM8782A responds
with data to clocks it receives over the digital audio interface. The mode is selected by setting the MS
input pin (see Table 3 Slave selection below). Slave mode is illustrated below.
Figure 4 Slave Mode
PIN DESCRIPTION
M/S Slave Selection
0 = Slave Mode
1= Reserved
Table 3 Slave selection
AUDIO INTERFACE CONTROL
The Input Word Length and Audio Format mode can be selected by using IWL and FORMAT pins.
PIN DESCRIPTION
IWL Word Length
0 = 16 bit
1 = 20 bit
Z = 24 bit
FORMAT
Audio Mode Select
0 = RJ
1 = LJ
Z = I2S
Table 4 Audio Data Format Control
w
PD, April 2010, Rev 4.8
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet WM8782A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| WM8782 | Stereo ADC | Wolfson Microelectronics |
| WM8782A | Stereo ADC | Wolfson Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |