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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.
WM8716
High Performance 24-bit, 192kHz Stereo DAC
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
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
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Production Data
,
September 2006, Rev 4.1
©2006
Wolfson Microelectronics plc
WM8716
TABLE OF CONTENTS
Production Data
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
TABLE OF CONTENTS .........................................................................................2
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
ABSOLUTE MAXIMUM RATINGS.........................................................................4
RECOMMENDED OPERATING CONDITIONS .....................................................4
ELECTRICAL CHARACTERISTICS ......................................................................5
TERMINOLOGY ............................................................................................................ 6
PIN DESCRIPTION ................................................................................................8
DEVICE DESCRIPTION.........................................................................................9
SYSTEM CLOCK .......................................................................................................... 9
AUDIO DATA INTERFACE ..................................................................................10
NORMAL SAMPLE RATE ........................................................................................... 10
8 X FS INPUT SAMPLE RATE .................................................................................... 11
MODES OF OPERATION ........................................................................................... 12
HARDWARE CONTROL MODES ............................................................................... 12
SOFTWARE CONTROL INTERFACE......................................................................... 13
REGISTER MAP ......................................................................................................... 13
MUTE MODES ............................................................................................................ 18
FILTER RESPONSES ................................................................................................. 19
APPLICATIONS INFORMATION .........................................................................22
RECOMMENDED EXTERNAL COMPONENTS .......................................................... 22
RECOMMENDED EXTERNAL COMPONENTS VALUES ........................................... 22
PACKAGE DIMENSIONS ....................................................................................25
IMPORTANT NOTICE ..........................................................................................26
ADDRESS: .................................................................................................................. 26
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WM8716
PIN CONFIGURATION
LRCIN
DIN
BCKIN
CLKO
XTI
XTO
DGND
DVDD
AVDDR
AGNDR
VMIDR
MODE8X
VOUTR
AGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ML/I2S
MC/DM1
MD/DM0
MUTEB
MODE
CSBIWO
RSTB
ZERO
AVDDL
AGNDL
VMIDL
DIFFHW
VOUTL
AVDD
ORDERING INFORMATION
TEMPERATURE
RANGE
MOISTURE
SENSITIVITY
LEVEL
MSL1
PEAK SOLDERING
TEMPERATURE
DEVICE
PACKAGE
WM8716SEDS
-25 to +85°C
28-lead SSOP
(Pb- free)
28-lead SSOP
(Pb- free, tape and reel)
260°C
WM8716SEDS/R
-25 to +85°C
MSL1
260°C
Note:
Reel quantity = 2,000
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WM8716
ABSOLUTE MAXIMUM RATINGS
Production Data
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.
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.
CONDITION
Supply voltage
Reference input
Operating temperature range, T
A
Storage temperature
Voltage range digital inputs
Master clock frequency
-25
°
C
-65
°
C
DGND -0.3V
MIN
-0.3V
MAX
+7.0V
VDD + 0.3V
+85
°
C
+150
°
C
DVDD +0.3V
37MHz
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Digital supply range
Analogue supply range
Ground
Difference DGND to AGND
Analogue supply current
Digital supply current
Analogue supply current
Digital supply current
AVDD = 5V
DVDD = 5V
AVDD = 3.3V
DVDD = 3.3V
SYMBOL
DVDD
AVDD
AGND, DGND
-0.3
TEST CONDITIONS
MIN
-10%
-10%
TYP
3.3 to 5
3.3 to 5
0
0
26
22
25
13
+0.3
40
35
MAX
+10%
+10%
UNIT
V
V
V
V
mA
mA
mA
mA
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WM8716
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
AVDD, DVDD = 5V, AGND, DGND = 0V, T
A
= +25 C, fs = 48kHz, SCKI = 256fs unless otherwise stated.
PARAMETER
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
Input HIGH level
(See Note 3)
Output LOW level
Output HIGH level
Analogue Output Levels
Output level
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
1.1
0.72
1
600
100
AVDD/2
0.5
2
V
RMS
V
RMS
kΩ
Ω
pF
V
%FSR
V
IL
V
IH
V
OL
V
OH
I
OL
= 2mA
I
OH
= 2mA
DVDD - 0.3V
2.0
DGND + 0.3V
0.8
V
V
-3dB
20kHz
195
-0.043
kHz
dB
f > 0.732fs
-82
9/fs
±0.001dB
-3dB
0.274fs
0.459fs
±0.001
dB
dB
s
f > 0.5465fs
-82
30/fs
±0.0012
dB
-3dB
0.4535fs
0.491fs
±0.0012
dB
dB
s
dB
0dB FS
-1dB FS
THD @ -60dB FS
105
105
112
-92
-97
112
dB
dB
dB
dB
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
o
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
AVDD to VMIDL/VMIDR and
VMIDL/VMIDR to AGND
10
AVSS/2
2.5V
kΩ
V
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