|
|
PDF WM8746 Data sheet ( Hoja de datos )
| Número de pieza | WM8746 | |
| Descripción | 24BIT 192KHZ 6 CHANNEL DAC WITH VOLUME CONTROL | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de WM8746 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
WM8746
24-bit, 192kHz 6-Channel DAC with Volume Control
DESCRIPTION
WM8746 is a high performance 6-channel DAC designed
for audio applications such as DVD, home theatre systems,
and digital TV. The WM8746 supports data input word
lengths from 16 to 32-bits and sampling rates up to 192kHz.
The WM8746 can convert up to 6 channels at sample rates
from 8 to 192kHz. Additionally WM8746 supports 2
channels at 192kHz and 4 channels at 96kHz
simultaneously.
The WM8746 consists of a serial interface port, digital
interpolation filters, multi-bit sigma delta modulators and 6
DACs in a small 28-pin SSOP package. The WM8746 also
includes a digitally controllable mute and attenuator function
on each channel.
The WM8746 supports a variety of connection schemes for
audio DAC control. The serial control interface provides
access to a wide range of features including on-chip mute,
attenuation and phase reversal. A hardware controllable
interface is also available. It is pin-compatible with the
WM8736, (apart from RSTB pin which is typically unused).
The WM8746 is an ideal device to interface to AC-3ä,
DTSä, and MPEG audio decoders for surround sound
applications, or for use in “universal” high definition audio
players supporting DVD-A formats.
FEATURES
• 6-Channel DAC
• Audio Performance
− 106dB SNR (‘A’ weighted @ 48kHz) DAC
− -96dB THD
• DAC Sampling Frequency: 8kHz – 192kHz
• 3-Wire Serial Control Interface
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• Independent Digital Volume Control on Each Channel with
127.5dB Range in 0.5dB Steps
• 3.0V – 5.5V Supply Operation
• 28-Pin SSOP Package
• Exceeds Dolby Class A Performance Requirements
• Pin Compatible with WM8736
APPLICATIONS
• DVD and DVD ‘Universal’ Players
• Home theatre systems
• Digital broadcast receivers
BLOCK DIAGRAM
SCKI ML/I2S MC/IWL MD/DM
MODE MUTE
CONTROL
INTERFACE
WM8746
BCKIN
LRCIN
LRCIN2
AUDIO
INTERFACE
DIN0
DIN1
DIN2
DAC
CHANNEL
CONTROL
DVDD
DGND
WOLFSON MICROELECTRONICS LTD
www.wolfsonmicro.com
L0A[7:0]
Digital
Filter
R0A[7:0]
L1A[7:0]
Digital
Filter
R1A[7:0]
L2A[7:0]
Digital
Filter
R2A[7:0]
Sigma
Delta
Modulator
Stereo
DAC
Sigma
Delta
Modulator
Stereo
DAC
Sigma
Delta
Modulator
Stereo
DAC
OUT0L
GR0
OUT0R
OUT1L
GR1
OUT1R
OUT2L
GR2
OUT2R
AGND1 AGND2 AVDD1 AVDD2 CAP
Advance Information November 2001, Rev 1.4
Copyright 2001 Wolfson Microelectronics Ltd.
1 page  
WM8746
DC ELECTRICAL CHARACTERISTICS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
SYMBOL
DVDD
AVDD1, AVDD2
AGND, GR, DGND
TEST CONDITIONS
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
AVDD = 5V
DVDD = 5V
AVDD = 3.3V
DVDD = 3.3V
Power down, stop clock
Power down, stop clock
Note:
1. The digital supply voltages must not exceed the analogue supply voltages.
MIN
3.0
3.0
-0.3
TYP
0
0
58
22
57
11
0.4
0.09
Advance Information
MAX
5.5
5.5
+0.3
UNIT
V
V
V
V
mA
mA
mA
mA
mA
mA
AC ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD = DVDD = 3V, AGND = 0V = DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP MAX
Digital Logic Levels (TTL Levels)
Input LOW level
VIL
0.8
Input HIGH level
VIH
2.0
Output LOW
VOL IOL = 2mA
0.4
Output HIGH
VOH
IOH = 2mA
2.4
Analogue Reference Levels
Reference voltage
VCAP
AVDD2-GR2
/2
Potential divider resistance
RCAP
25K
DAC Output (Load = 10K ohms. 50pF)
0dBFs Full scale output voltage
At DAC outputs
1.1 x
AVDD1/5
SNR (Note 1,2,3)
A-weighted,
100 106
@ fs = 48kHz
SNR (Note 1,2,3)
A-weighted
98 105
@ fs = 96kHz
SNR (Note 1,2,3)
A-weighted
105
@ fs = 192kHz
SNR (Note 1,2,3)
A-weighted,
103
@ fs = 48kHz
AVDD=DVDD=3.3V
SNR (Note 1,2,3)
A-weighted
103
@ fs = 96kHz
AVDD=DVDD=3.3V
SNR (Note 1,2,3)
Non ‘A’ weighted @ fs
= 48kHz
103
AVDD=DVDD=5V
THD (Note 1,2,3)
1kHz, 0dBFs -90 -95
THD+N (Dynamic range, Note 2)
1kHz, -60dBFs
-100
-106
DAC channel separation
<95
UNIT
V
V
V
V
V
Ohms
Vrms
dB
dB
dB
dB
dB
dB
dB
dB
dB
PP Rev 1.4 November 2001
5
5 Page 
WM8746
Advance Information
RIGHT JUSTIFIED MODE
In right justified mode, the LSB is sampled on the rising edge of BCKIN preceding a LRCIN
transition. LRCIN is high during the left samples and low during the right samples.
LRCIN
BCKIN
LEFT CHANNEL
1/fs
RIGHT CHANNEL
DIN0/1/2
12
MSB
3
n-2 n-1 n
LSB
123
MSB
n-2 n-1 n
LSB
Figure 5 Right Justified Mode TIming Diagram
I2S MODE
In I2S mode, the MSB is sampled on the second rising edge of BCKIN following a LRCIN transition.
LRCIN is low during the left samples and high during the right samples.
1/fs
LRCIN
LEFT CHANNEL
RIGHT CHANNEL
BCKIN
DIN0/1/2
1 BCKIN
123
MSB
n-2 n-1 n
LSB
1 BCKIN
123
MSB
n-2 n-1 n
LSB
Figure 6 I2S Mode TIming Diagram
DSP EARLY MODE
In DSP early mode, the first bit is sampled on the BCKIN edge following the one which detects a low
to high transition on LRCIN.
LRCIN
BCKIN
DIN0
1 BCKIN
1/fs
1 BCKIN
CHANNEL 0
LEFT
CHANNEL 0
RIGHT
CHANNEL 1
LEFT
12
MSB
n-1 n 1
LSB
2
n-1 n 1 2
Input Word Length (IWL)
CHANNEL 2
RIGHT
n-1 n
NO VALID DATA
Figure 7 DSP Early Mode Timing Diagram
PP Rev 1.4 November 2001
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet WM8746.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| WM8740 | 24-bit/ High Performance 192kHz Stereo DAC | Wolfson Microelectronics plc |
| WM8741 | 24-bit 192kHz DAC |  Wolfson Microelectronics |
| WM8742 | 24-bit 192kHz DAC | Wolfson Microelectronics |
| WM8746 | 24BIT 192KHZ 6 CHANNEL DAC WITH VOLUME CONTROL | Wolfson Microelectronics plc |
| 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 |