MOSA
MS6821
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
4 Stereo Inputs, 2W BTL Stereo Output
16-bit Stereo DAC and Volume Control
FEATURES
•Operation
range: 2.4V~5.5V
•Volume
control range
Gain: 0 to 21dB, 3dB/step
Attenuation: 0 to –77.5dB, 1.25dB/step
•4
stereo inputs (mixed with an audio DAC)
•Output
mode : Speaker( BTL)/Headphone(SE)
•BTL
Output power, THD+N=1%, Stereo Input
R
L
=4 , 2W at 5V, 0.8W at 3.3V, 360mW at 2.4V
R
L
=8 , 1.3W at 5V, 0.53W at 3.3V, 250mW at 2.4V
•BTL
Output power, DAC Input
R
L
=4 , 1.6W at 5V, 0.70W at 3.3V, 340mW at 2.4V
R
L
=8 , 0.83W at 5V, 0.35W at 3.3V, 170mW at 2.4V
•Built-in
16-bit Audio DAC
•Audio
format : I
2
S, Right justified, Left justified
•Control
interface : I
2
C
•Excellent
Power Supply Rejection Ratio(PSRR)
•Flexibility
power management
•Component
less
•Reduce
pop noise circuit
•Housed
in TSSOP28 package, enhanced thermal
PAD
APPLICATIONS
Multimedia system, Portable Digital Audio.
DESCRIPTION
The MS6821 is a 16-bits voltage-output Digital-to-Analog Converter (DAC) integrated class AB stereo headphone
driver and stereo speaker power amplifier. It can drive 2W of continuous average power into a dual 4 bridged-tied
(BTL) speaker or 2 * 90mW into stereo 32 single ended (SE) headphone. The 16-bit DAC supports general and
popular formats as I2S, Right justified. The volume control offers wide range of gain and attenuation for 4-set stereo
input. All of the functions are set by I2C interface.
The MS6821 has good feature for portable equipment, including wide voltage operation 2.4V~5.5V, low power
consumption, flexible power management, component less and small package TSSOP28, make the MS6821 ideally
suitable for use in the portable digital audio equipments.
BLOCK DIAGRAM
LIN1
LIN2
LIN3
LIN4
Attenuation
&
Mute
Mixer
-1
OUTR-
L-ch selector
& Gain
-1
RIN4
RIN3
RIN2
RIN1
R-ch selector
& Gain
Attenuation
&
Mute
OUTR+
Mixer
-1
OUTL-
BCK
WS
DATA
16-bit DAC
-1
OUTL+
Supply
I
2
C
Interface
Power Amplifier
Supply
VDD
Vss
CAP
DACL /
DACR /
LINE_INL LINE_INR
SCL SDA
PV
DDL
PV
SSL
PV
DDR
PV
SSR
REV 1.0
1
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MOSA
PIN CONFIGURATION
Symbol
WS
BCK
CAP
RIN1
RIN2
RIN3
RIN4
V
SS
PV
DDR
OUTR-
OUTR+
GND
PV
SSR
DACR
LINE_INR
DACL
LINE_INL
PV
SSL
GND
OUTL+
OUTL-
PV
DDL
V
DD
LIN4
LIN3
LIN2
LIN1
SDA
SCL
DATA
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
MS6821
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
Description
Audio word select input
Audio bit clock input
Capacitor connected
Right channel input 1
Right channel input 2
Right channel input 3
Right channel input 4
Negative supply voltage
Positive supply voltage for right
channel of power amplifier
SE right channel output or negative
output of BTL right channel
Positive output of BTL right channel
Connected to ground
Negative supply voltage for right
channel of power amplifier
DAC right channel output
LINE_IN right channel input
DAC Left channel output
LINE_IN left channel input
Negative supply voltage for left channel
of power amplifier
Connected to ground
Positive output of BTL left channel
SE left channel output or negative
output of BTL left channel
Positive supply voltage for left channel
of power amplifier
Positive supply voltage
Left channel input 4
Left channel input 3
Left channel input 2
Left channel input 1
I
2
C data input
I
2
C clock input
Audio data input
BTL: Bridged-Tied Load
WS
1
BCK
2
CAP
3
RIN1
4
RIN2
5
RIN3
6
RIN4
7
V
SS
8
PV
DDR
9
OUTR-
10
OUTR+
11
GND
12
PV
SSR
13
DACR
14
Thermal
Pad
28
DATA
27
SCL
26
SDA
25
LIN1
24
LIN2
23
LIN3
22
LIN4
21
V
DD
20
PV
DDL
19
OUTL-
18
OUTL+
17
GND
16
PV
SSL
15
DACL
MS6821, TSSOP28
Note: 1. SE: Single Ended.
REV 1.0
2
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MOSA
ORDERING INFORMATION
Package
28Pin TSSOP (lead free)
28Pin TSSOP (lead free)
RoHS Compliance
MS6821
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
Part number
MS6821TGTR
MS6821TGU
Packaging Marking
MS6821G
MS6821G
Transport Media
3k Units Tape and Reel
50 Units Tube
ABSOLUTE MAXIMUM RATINGS
Symbol
V
DD
V
ESD
T
STG
T
A
T
J
T
S
R
THJA
Supply voltage
Electrostatic handling
Storage temperature range
Operating ambient temperature range
Maximum junction temperature
Soldering temperature, 10 seconds
Thermal resistance from junction to ambient in free air
TSSOP28 (enhance thermal pad)
Parameter
Rating
6
2000
-65 to 150
-40 to 85
150
260
51
Unit
V
V
℃
℃
℃
℃
℃/W
OPERATING RATINGS
Symbol
V
DD
Supply voltage
Parameter
Min
2.4
Typ
5
Max
5.5
Unit
V
REV 1.0
3
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MOSA
Symbol
DC Characteristics
V
CAP
V
DC
Voltage at CAP
Output DC level
Parameter
MS6821
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
5V ELECTRICAL CHARACTERISTICS
(Ta=25℃, V
DD
=5V, V
SS
=0V, f=1kHz; unless otherwise specified)
Conditions
Min
0.5V
DD
-0.05
0.5V
DD
-0.05
-
-
-
-
-
-
-
-
Typ
Max
0.5V
DD
+0.05
0.5V
DD
+0.05
-
-
-
-
-
-
-
0.3
uA
-90
Gain
Attenuation
0
-77.5
-
-
-
2
0.8
BTL Mode , R
L
=8Ω
CAP=1uF, f=200Hz
SE Mode , R
L
=32Ω
CAP=1uF, f=200Hz
BTL Mode, R
L
=8Ω
Po=1W
SE Mode, R
L
=32Ω
Po=60mW
SE mode, R
L
=32Ω, 60mW
SE mode, A-weighting,
75mW
BTL Mode, R
L
= 4Ω
THD+N = 1%
BTL Mode, R
L
= 8Ω
THD+N = 1%
SE Mode, R
L
= 32Ω
THD+N = 0.1%
3
1.25
0.3
-
21
0
-
-
-
dB
dB
dB
dB
dB
dB
V
V
mA
Unit
0.5V
DD
0.5V
DD
13.0
9.8
9.9
6.7
8.2
6.6
3.2
-
12
V
V
All devices are active, BTL
All devices are active, SE
DAC PD, BTL
I
Q
Quiescent current
DAC PD, SE
L-ch (R-ch) PD, BTL
DAC active
L-ch (R-ch) PD, SE
DAC active
Only DAC is active
All devices power down
All devices power down,
except CAP=1/2 VDD
I
PD
ATT
GA
RAN
G
STEP
A
STEP
E
GA
V
I2CH
V
I2CL
Power down current
Mute attenuation
Gain/Attenuation range
Gain step
Attenuation step
Gain/Attenuation step error
Serial interface high input level
Serial interface low input level
AC Characteristics (Stereo input)
-
-
-
-
-
-
-
-
-
-
61
65
78
81
-65
0.0562
93
2
1.3
93m
-
-
-
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
%
dB
W
W
W
PSRR
Power supply rejection ratio
CS
Channel separation
THD+N
S/N
Total harmonic distortion plus
Noise
Signal-to-noise ratio
Po
Maximum output power
PD: Power Down
REV 1.0
4
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MOSA
Symbol
Res
V
FSDAC
PSRR
CS
THD+N
S/N
Resolution
Parameter
Audio DAC Characteristics
MS6821
4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control
Conditions
Min
-
Typ
-
V
FS
66
67
88
Max
16
V
FS
+1.5%
-
-
-62
0.079
-
-
-
-
Unit
bits
V
dB
dB
dB
%
dB
W
W
W
(sampling rate=4fs, fs= 44.1kHz, f=1kHz)
V
FS
=0.72 * V
DD
CAP=1uF (200Hz)
CAP=10uF (200Hz)
-
-
86
1.44
0.75
41.4m
V
FS
-
1.5%
Full scale output voltage of DAC
Power supply rejection ratio
Channel separation
Total harmonic distortion plus
noise
Signal-to-noise ratio
DAC output, R
L
=1kΩ, V
FS
DAC output, R
L
=1kΩ, V
FS
A-weighting
BTL Mode, R
L
= 4Ω
THD+N = 0.33%
BTL Mode, R
L
= 8Ω
THD+N = 0.15 %
SE Mode, R
L
= 32Ω
THD+N = 0.042%
-67
0.0447
90
1.6
0.83
46m
DACPo
Maximum output power
using DAC
3.3V ELECTRICAL CHARACTERISTICS
(Ta=25℃, V
DD
=3.3V, V
SS
=0V, f=1kHz; unless otherwise specified)
Symbol
DC Characteristics
All devices are active, BTL
All devices are active, SE
DAC PD, BTL
I
Q
Quiescent current
DAC PD, SE
L-ch (R-ch) PD, BTL
DAC active
L-ch (R-ch) PD, SE
DAC active
Only DAC is active
-
-
-
-
-
-
-
-
-
-
-
-
11.5
8.5
9
6
7.1
5.6
2.6
-67
0.0447
0.8
0.53
35m
-
-
-
-
-
-
-
60
0.1
-
-
-
dB
%
W
W
W
mA
Parameter
Conditions
Min
Typ
Max
Unit
AC Characteristics (Stereo input)
THD+N
Total harmonic distortion plus
Noise
SE mode, R
L
=32Ω, 35mW
BTL Mode, R
L
= 4Ω
THD+N = 1%
BTL Mode, R
L
= 8Ω
Po
Maximum output power
THD+N = 1%
SE Mode, R
L
= 32Ω
THD+N = 0.1%
Audio DAC Characteristics
(sampling rate=4fs, fs= 44.1kHz, f=1kHz)
THD+N
Total harmonic distortion plus
noise
DAC output, R
L
=1kΩ, V
FS
BTL Mode, R
L
= 4Ω
THD+N = 0.25%
BTL Mode, R
L
= 8Ω
THD+N = 0.14 %
SE Mode, R
L
= 32Ω
THD+N = 0.052%
5
-
-
0.63
0.32
18m
-66
0.05
0.70
0.35
20m
60
0.1
-
-
-
dB
%
W
W
W
DACPo
Maximum output power
using DAC
REV 1.0
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