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PDF WM8716 Data sheet ( Hoja de datos )
| Número de pieza | WM8716 | |
| Descripción | High Performance 24-bit 192kHz Stereo DAC | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
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WM8716
High Performance 24-bit, 192kHz Stereo DAC
DESCRIPTION
The WM8716 is a high performance stereo DAC designed
for audio applications such as CD, DVD, home theatre
systems, set top boxes and digital TV. The WM8716
supports data input word lengths from 16 to 24-bits and
sampling rates up to 192kHz. The WM8716 consists of a
serial interface port, digital interpolation filter, multi-bit sigma
delta modulator and stereo DAC in a small 28-lead SSOP
package. The WM8716 also includes a digitally controllable
mute and attenuator function on each channel.
The internal digital filter has two selectable roll-off
characteristics. A sharp or slow roll-off can be selected
dependent on application requirements. Additionally, the
internal digital filter can be by-passed and the WM8716
used with an external digital filter.
The WM8716 supports two connection schemes for audio
DAC control. The SPI-compatible serial control port
provides access to a wide range of features including on-
chip mute, attenuation and phase reversal. A hardware
controllable interface is also available.
BLOCK DIAGRAM
FEATURES
• 112dB SNR (‘A’ weighted @ 48kHz), THD: -97dB @
-1dB FS
• Sampling frequency: 8kHz to 192kHz
• Selectable digital filter roll-off
• Optional interface to industry standard external filters
• Differential mono mode
• Input data word: 16 to 24-bit
• Hardware or SPI compatible serial port control modes:
− Hardware mode: mute, de-emphasis, audio format
control
− Serial mode: mute, de-emphasis, attenuation (256
steps), phase reversal
• Compatible upgrade to PCM1716
APPLICATIONS
• CD, DVD audio
• Home theatre systems
• Set top boxes
• Digital TV
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
Production Data, August 2008, Rev 4.2
©2008 Wolfson Microelectronics plc
1 page  
Production Data
WM8716
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
AVDD, DVDD = 5V, AGND, DGND = 0V, TA = +25oC, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
SYMBOL
DAC Circuit Specifications
SNR (See Notes 1 and 2)
THD (full-scale)
(See Note 2)
Dynamic range
(See Note 2)
Filter Characteristics (Sharp Roll-off)
Passband
Stopband
Passband ripple
Stopband Attenuation
Delay time
Filter Characteristics (Slow Roll-off)
Passband
Stopband
Passband ripple
Stopband Attenuation
Delay time
Internal Analogue Filter
Bandwidth
Passband edge response
Digital Logic Levels
Input LOW level
VIL
Input HIGH level
(See Note 3)
VIH
Output LOW level
Output HIGH level
VOL
VOH
TEST CONDITIONS
0dB FS
-1dB FS
THD @ -60dB FS
MIN TYP MAX
105 112
-92
-97
105 112
±0.0012 dB
-3dB
f > 0.5465fs
±0.001dB
-3dB
f > 0.732fs
-3dB
20kHz
IOL = 2mA
IOH = 2mA
0.4535fs
-82
0.491fs
30/fs
±0.0012
0.274fs
0.459fs
±0.001
-82
9/fs
195
-0.043
0.8
2.0
DVDD - 0.3V
DGND + 0.3V
UNIT
dB
dB
dB
dB
dB
dB
dB
s
dB
dB
s
kHz
dB
V
V
Analogue Output Levels
Output level
Minimum resistance load
Maximum capacitance load
Output DC level
Gain mismatch channel to
channel
Reference Levels
Potential divider resistance
Voltage at VMIDL/VMIDR
POR
POR threshold
Into 10kΩ, full scale 0dB,
(5V supply)
Into 10kΩ, full scale 0dB,
(3.3V supply)
To midrail or AC coupled
(5V supply)
To midrail or AC coupled
(3.3V supply)
5V or 3.3V
AVDD to VMIDL/VMIDR and
VMIDL/VMIDR to AGND
1.1
0.72
1
600
100
AVDD/2
0.5
10
AVSS/2
2.5V
VRMS
VRMS
kΩ
Ω
pF
V
2 %FSR
kΩ
V
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PD, Rev 4.2, August 2008
5
5 Page 
Production Data
8 X FS INPUT SAMPLE RATE
WM8716
Due to the higher speed of the interface in 8 x fs mode, audio data is input on two pins. The MODE
pin (pin 24) is used as the second input for the right channel data and left data is input on DIN (pin 2).
In this mode, software control of the device is not available. The data can be input in two formats, left
or right justified, selectable by ML/I2S and two word lengths (20 or 24 bit), selectable by CSBIWO. In
both modes the data is always clocked in MSB first.
For left justified data the word start is marked by the falling edge of LRCIN. The data is clocked in on
the next 20/24 BCKIN rising edges. This format is compatible with devices such as the PMD100.
For right justified the data is justified to the rising edge of LRCIN and the data is clocked in on the
preceding 20/24 BCKIN rising edges before the LRCIN rising edge. This format is compatible with
devices such as the DF1704 or SM5842.
In both modes the polarity of LRCIN can be switched using MD/DM0.
Differential hardware mode can be used in conjunction with 8fs mode by setting the DIFFHW
pin high. In differential 8fs mode the data is input on DIN and output differentially. MODE is unused
and must be tied low.
LRCIN (PIN 1)
BCKIN (PIN 3)
LEFT AUDIO
DATA DIN
(PIN 2)
RIGHT AUDIO
DATA MODE
(PIN 24)
LRCIN (PIN 1)
BCKIN (PIN 3)
LEFT AUDIO
DATA DIN
(PIN 2)
RIGHT AUDIO
DATA MODE
(PIN 24)
1/8fs
B23 B22 B21 B20 B19
B2 B1 B0
B23 B22 B21 B20 B19
B2 B1 B0
1/8fs
B23 B22 B21 B20
B23 B22 B21 B20
B23 B22 B21 B20 B19
B2 B1 B0
B23 B22 B21 B20 B19
B2 B1 B0
Figure 5 Audio Data Input Format (8 x fs Operation)
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PD, Rev 4.2, August 2008
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet WM8716.PDF ] | |
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