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MOSA
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
1 Stereo Input and 2 Channels Output Volume, Tone, Balance, Loudness Function
FEATURES
Operation range : 2.7V~5V 2 independent speaker controls for balance Tone controls (treble and bass) Loudness and independent mute function Volume control in 1.25 dB/step I2C interface Components less and good PSRR Housed in SOP20, SSOP20 package
APPLICATIONS
Portable audio device Hi-Fi audio system Cross-reference: TDA7315, PT2315
DESCRIPTION
The MS6715 is a 1 stereo inputs/2-channel outputs digital control audio processor for the low voltage operation. Volume, tone (bass and treble), and balance (left/right) processor are incorporated into a single chip. The MS6715 also has the loudness function. These functions can be built a Hi-Fi audio system easily. All functions are programmable via the serial I2C bus. The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the bass and the treble are 0dB.
BLOCK DIAGRAM
LOUD_L 9 BOUT_L BIN_L 13 12 TREB_L 4
RB
Mute
LIN
11
Volume & Londness
17
OUT_L
Bass
Treble
Speaker ATT
20
Serial Bus Decoder and Latches
SCL 19 SDA 18 DGND
Speaker ATT
RIN
6
Volume & Londness
Bass
Treble
16
OUT_R
Mute RB
Supply
2 3 1 7 LOUD_R 15
14
5 TREB_R
AVDD AGND REF
BOUT_R BIN_R
REV1.0
1
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PIN CONFIGURATION
Symbol REF VDD AGND TREB_L TREB_R RIN LOUD_R NC LOUD_L NC LIN BIN_L BOUT_L BIN_R BOUT_R OUT_R OUT_L DGND SDA SCL Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Description Analog Reference Voltage1/2VDD Supply Input Voltage Analog Ground Left Channel Input for Treble Controller Right Channel Input for Treble Controller Right Channel Input Right Channel Loudness Input No Connected Left Channel Loudness Input No Connected Left Channel Input Left Bass Controller Input Channel Left Bass Controller Output Channel Right Bass Controller Input Channel Right Bass Controller Output Channel Right Speaker Output Left Speaker Output Digital Ground I2C Data Input I2C Clock Input
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
REF 1 VDD 2 AGND 3 TREB_L 4 TREB_R 5
20 SCL 19 SDA 18 DGND 17 OUT_L
MS6715
RIN 6 LOUD_R 7 NC 8 LOUD_L 9 NC 10
16 OUT_R 15 BOUT_R 14 BIN_R 13 BOUT_L 12 BIN_L 11 LIN
SOP20 / SSOP20
ORDERING INFORMATION
Package 20-Pin SOP (lead free) 20-Pin SOP (lead free) 20-Pin SSOP (lead free) 20-Pin SSOP (lead free) Part number MS6715GTR MS6715GU MS6715SSGTR MS6715SSGU Packaging Marking MS6715G MS6715G MS6715G MS6715G Transport Media 1k Units Tape and Reel 36 Units Tube 2.5k Units Tape and Reel 56 Units Tube
ABSOLUTE MAXIMUM RATINGS
Symbol VDD VESD TSTG TA TJ TS RTHJA 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 SOP20 SSOP20
2
Parameter
Rating 6 -3000 to 3000 -65 to 150 -40 to 85 150 260 210 210
Unit V V /W
REV1.0
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OPERATING RATINGS
Symbol VDD Supply Voltage Parameter
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
Min 2.7
Typ -
Max 5.5
Unit V
5V ELECTRICAL CHARACTERISTICS
(Ta=25, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Symbol Supply IQ PSRR Input RIN LOUD Input Resistance Loudness CLoud=100nF, f =20Hz Volume=-40dB Attenuation Av = 0 to -40dB Av = -40 to -60dB Attenuation 35 19 50 20 70 k dB Quiescent Current Power Supply Rejection Ratio VIN=0V CREF = 22uF, f = 100Hz 55 12.2 60 12.5 mA dB Parameter Conditions Min Typ Max Unit
Volume control CRVOL RESVOL Volume Control Range Volume Step Resolution -78.75 -1 -5 -37.5 -0.2 Boost/Cut f =100Hz -14 -0.3 34 Boost/Cut f =20kHz (THD+N)/S <0.3% VOUT=2Vpp VOUT=4Vpp -14 -0.3 93 2 1.25 0 0 1.25 0 -65 2 0 44 2 0 4.5 -75 0.0177 97 97 0 0.5 1 0 0.1 -60 14 0.1 58 14 0.1 0.8 dB dB dB dB dB dB dB dB dB dB dB k dB dB dB Vpp dB % dB dB V V
ERRVOL Volume Setting Error Speaker Attenuators CRSPK RESSPK ERRSPK MUTE CRBAS RESBAS ERRBAS RB
B
Speaker Control Range Speaker Step Resolution Speaker Setting Error Output Mute Attenuation Bass Control Range Bass Step Resolution Speaker Setting Error Internal Feedback Resistance Treble Control Range Treble Step Resolution Treble Setting Error Maximum Output Voltage Swing Total Harmonic Distortion Plus Noise Signal-to-Noise Ratio Channel Separation Left/Right Bus High Input Level Bus Low Input Level
Bass Control
Treble Control CRBAS RESBAS ERRBAS General VOMAX THD+N S/N CS VIH VIL
Bus Input
Notes: Bass and Treble response see to curve. The center frequency and quality of the response behavior can be chosen by the external.
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MOSA
2.7V ELECTRICAL CHARACTERISTICS
Symbol Supply IQ PSRR General VOMAX THD+N S/N CS Maximum Output Voltage Swing Total Harmonic Distortion Plus Noise Signal-to-Noise Ratio Channel Separation Left/Right Quiescent Current Power Supply Rejection Ratio VIN=0V Parameter
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
(Ta=25, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Conditions Min 53 90 90 Typ 8.7 58 2.5 -50 0.3 94 94 Max 9 Unit mA dB Vpp dB % dB dB
CREF = 22uF, f = 100Hz (THD+N)/S <0.3% VOUT=2Vpp VOUT=2.5Vpp
TYPICAL PERFORMANCE CHARACTERISTICS
(Ta=25, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified)
VDD=5V
VDD=5V Volume=-40dB
100nF
33nF
OPEN
Loud (dB)
Loud (dB)
Loud (dB)
10nF
220nF
Loudness OFF VDD=5V CLOUD = 100nF
56nF
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
Loudness vs. Volume
Loudness vs. Frequency vs. Volume
Loudness vs. External Capacitors
CHANNEL SEPARATION (dB)
VDD=2.7V VIN=-3dBV
VDD=5V VIN=0dBV
VDD=5V Treble=Bass= -14~14dB
FREQUENCY (Hz)
FREQUENCY (Hz)
QUIESCENT CURRENT (mA)
Tone (dB)
SUPPLY VOLTAGE (V)
Typical Tone Response
Channel Separation vs. Frequency
Quiescent Current vs. Supply Voltage
REV1.0
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MOSA
VDD=2.7V VO=2Vpp
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
f=1kHz
THD+N (%)
THD+N (%)
f=20kHz
THD+N (%)
f=20Hz
f=20kHz
f=20Hz
VDD=5V VO=2Vpp VDD=5V
f=1kHz VDD=2.7V
FREQUENCY (Hz)
OUTPUT VOLTAGE (dBV)
OUTPUT VOLTAGE (dBV)
THD+N vs. Frequency
THD+N vs. Output Voltage
THD+N vs. Output Voltage
CAP=22uF
CAP=22uF
PSRR (dB)
CAP=10uF
PSRR (dB)
CAP=10uF
VDD=5V VRR=-20dBV
VDD=2.7V VRR=-20dBV
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR vs. Frequency
PSRR vs. Frequency
REV1.0
5
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I2C BUS DESCRIPTION
Start and Stop Conditions
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
A start condition is activated when the SCL is set to HIGH and SDA shifts from HIGH to LOW state. The stop condition is activated when SCL is set to HIGH and SDA shifts from LOW to HIGH state. Please refer to the timing diagram below.
SCL
SDA
Start
Stop
SCL: Serial Clock Line, SDA: Serial Data Line
Data Validity A data on the SDA line is considered valid and stable only when the SCL signal is in HIGH state. The HIGH and LOW states of the SDA line can only change when the SCL signal is LOW. Please refer to the figure below.
SDA
SCL Data line stable, Data valid Data change allowed
Byte Format Every byte transmitted to the SDA line consists of 8 bits. Each byte must be followed by an acknowledge bit. The MSB is transmitted first.
Acknowledge During the Acknowledge clock pulse, the master (up) put a resistive HIGH level on the SDA line. The peripheral (audio processor) that acknowledges has to pull-down (LOW) the SDA line during the Acknowledge clock pulse so that the SDA line is in a stable LOW state during this clock pulse. Please refer to the diagram below.
SCL 1 2 3 7 8 9
SDA MSB Start Acknowledge
The audio processor that has been addressed has to generate an Acknowledge after receiving each byte, otherwise, the SDA line will remain at the HIGH level during the ninth (9th) clock pulse. In this case, the master transmitter can generate the STOP information in order to abort the transfer.
REV1.0
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Timing of SDA and SCL Bus Lines
SDA tf SCL
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
tLOW
tr
tSU;DAT
tf
tHD;STA
tSP
tr
tBUF
S
tHD;STA
tHD;DAT
tHIGH
tSU;STA
Sr
tSU;STO
P
S
Standard Mode Symbol fSCL tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tr tf tSU:STO tBUF Cb VnL VnH
Parameter
Min 0 4.0 4.7 4.0 4.7 0 250 4.0 4.7 -
Max 100 3.45 1000 300 400 -
Unit kHz us us us us us ns ns ns us us pF V V
SCL clock frequency Hold time (repeated) START condition. After this period, the first clock pulse is generated LOW period of the SCL clock HIGH period of the SCL clock Set-up time for a repeated START condition Data hold time: For I2C-bus devices Data-set-up time Rise time of both SDA and SCL signals Fall time of both SDA and SCL signals Set-up time for STOP condition Bus free time between a STOP and START condition Capacitive load for each bus line
Noise margin at the LOW level for each connected device (including 0.1VDD hysteresis) Noise margin at the HIGH level for each connected device (including 0.2VDD hysteresis)
BUS INTERFACE
Data are transmitted to and from the MCU to the MS6715 via the SDA and SCL. The SDA and SCL make up the BUS interface. It should be noted that pull-up resistors must be connected to the positive supply voltage.
VDD
Rp Rp
Pull up resistors
SDA (Serial Data Line)
SCL (Serial Clock Line)
MCU
MS6715
REV1.0
7
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Interface Protocol
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
The format consists of the following A START condition A chip address byte including the MS6715 address. (7bits) The 8th bit of the byte must be "0".(write=0, read=1) MS6715 must always acknowledge the end of each transmitted byte. A data sequence (N-bytes + Acknowledge) A STOP condition
SDA
SCL
1-7
8
9
1-7
8
9
1-7
8
9
S START CONDITION ADDRESS
W R / --
P ACK DATA ACK DATA ACK STOP CONDITION
Address Code The chip address of the MS6715 is 88H.
1 0 0 0 1 0 0 0 W
7 bits address MS6715 address
Data Bytes Description The default states of the chip as the power is on are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the bass and the treble are 0dB. MSB 0 1 1 0 0 0 0 0 0 1 1 1 B2 0 1 0 1 1 B1 B1 B1 * 0 1 B0 B0 B0 * C3 C3 A2 A2 A2 L C2 C2 A1 A1 A1 * C1 C1 LSB A0 A0 A0 * C0 C0 Function Volume Control Speaker ATT L Speaker ATT R Loudness Control Bass Control Treble Control
Where Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; * = No effect
REV1.0
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Volume MSB 0 0 B2 B1 B0 A2 0 0 0 0 1 1 1 1 0 0 B2 0 0 0 0 1 1 1 1 The default volume is -78.75dB. B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 A2
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
LSB A1 0 0 1 1 0 0 1 1 A1 A0 0 1 0 1 0 1 0 1 A0
Function Volume 1.25 dB steps 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 Volume 10dB steps 0 -10 -20 -30 -40 -50 -60 -70
Speaker Attenuator MSB 1 1 0 0 0 1 B1 B1 B0 B0 A2 A2 0 0 0 0 1 1 1 1 0 0 1 1 1 The default state is mute. 0 1 0 1 1 1 1 1 A1 A1 0 0 1 1 0 0 1 1 LSB A0 A0 0 1 0 1 0 1 0 1 FunctiondB Speaker ATT L Speaker ATT R 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 0 -10 -20 -30 Mute
REV1.0
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MOSA
Loudness MSB 0 1 0 X X L 0 1 The default state is loudness off. X: don't care. X
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
LSB X
Function Loudness Loudness ON Loudness OFF
Bass and Treble MSB 0 0 1 1 1 1 0 1 C3 C3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 The default state is bass 0dB and treble 0dB. C2 C2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 C1 C1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 LSB C0 C0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 FunctiondB Bass Treble -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14
REV1.0
10
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MOSA
Examples Set Volume at -37.5dB.
MSB Start LSB ACK 0 0 0 Data byte 1 -30dB 1 1
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
MS6715 Address
1
0
ACK
Stop
-7.5dB
Set Speaker Right at -30dB.
MSB Start LSB ACK 1 0 1 Data byte 1 1 0 0 0dB 0 ACK Stop
MS6715 Address
Speaker R
-30dB
Set Speaker Left in mute-on.
MSB Start LSB ACK 1 0 0 Data byte 1 1 1 Mute 1 1 ACK Stop
MS6715 Address
Speaker L
Set Loudness in turn-on.
MSB Start LSB ACK 0 1 0 Data byte X X 0 X X ACK Stop
MS6715 Address
X : don care Loudness ON
Set Treble at -10dB.
MSB Start LSB ACK 0 1 1 Data byte 1 0 0 1 0 ACK Stop
MS6715 Address
Treble
-10dB
REV1.0
11
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APPLICATION INFORMATION
Basic Application Example
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
5.6K
MCU
100n
20 19 18 9
100n
13
100n
12
2.7n
4
TREB_L
SDA
DGND
SCL
LOUD_L
BIN_L
BOUT_L
2.2u INPUT
11
10u LIN OUT_L
17
6
MS6715
RIN OUT_R
16
10u
OUTPUT
2.2u
LOUD_R
BOUT_R
TREB_R
BIN_R
AGND
3
AVDD
2
REF
1
7
15
14
5
22u AVDD
100n
100n 5.6K
100n
2.7n
REV1.0
12
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EXTERNAL DIMENSIONS
SSOP20
D
MS6715
1 Stereo Input / 2 Channels Output Audio Processor
Detail A
Symbol
E1 E
H x 45 c ZD
A2
A 2
e
b
A1
1 R1 L1 R Detail A L
A A1 A2 b c e D E E1 L h L1 ZD R1 R 1 2
Dimension in mm Dimension in inch Min Max Min Max 1.35 1.75 0.053 0.069 0.10 0.25 0.004 0.010 1.50 0.059 0.20 0.30 0.008 0.012 0.18 0.25 0.007 0.010 0.635 BASIC 0.025 BASIC 8.56 8.74 0.337 0.344 5.79 6.20 0.228 0.244 3.81 3.99 0.150 0.157 0.41 1.27 0.016 0.050 0.25 0.50 0.010 0.020 0.254 BASIC 0.010 BASIC 1.4732 REF 0.058 REF 0.20 0.33 0.008 0.013 0.20 0.008 o o o 0 8 0 8o 0o 0o o o o o 5 15 5 15
SOP20 (300mil)
D
Detail A
Symbol
E H
h x 45 C
A A1 B C e D E H L h
Dimension in mm Min Max 2.35 2.65 0.10 0.30 0.33 0.51 0.23 0.32 1.27 BSC 12.6 13 7.4 7.60 10.00 10.65 0.40 1.27 0.25 0.75 o 8o 0
Dimension in inch Min Max 0.0926 0.1043 0.004 0.0118 0.013 0.020 0.0091 0.0125 0.050 BSC 0.4961 0.5118 0.2914 0.2992 0.394 0.419 0.016 0.050 0.010 0.029 0o 8o
A
A1
e
B
0.25mm Detail A L
REV1.0
13
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