MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor 1 Stereo Input and 1 Stereo Output Volume, Tone, Balance, Loudness Function FEATURES APPLICATIONS •Operation range : 2.7V~6.5V •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 •Portable audio device •Hi-Fi audio system •Cross-reference: TDA7315 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 LIN Volume & Londness 11 Mute 17 OUT_L Bass Treble Speaker ATT 20 SCL 19 SDA 18 DGND Serial Bus Decoder and Latches RIN Volume & Londness 6 Bass Treble Speaker ATT 16 OUT_R Mute RB Supply 2 3 1 AVDD AGND REF REV 3 7 LOUD_R 15 14 BOUT_R BIN_R 1/16 5 TREB_R www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor PIN CONFIGURATION Symbol REF Pin 1 VDD AGND 2 3 Description Analog Reference Voltage（1/2VDD） Supply Input Voltage Analog Ground TREB_L 4 Left Channel Input for Treble Controller TREB_R RIN 5 6 Right Channel Input for Treble Controller Right Channel Input LOUD_R NC 7 8 Right Channel Loudness Input No Connected LOUD_L NC 9 10 Left Channel Loudness Input No Connected LIN 11 Left Channel Input BIN_L BOUT_L 12 13 Left Bass Controller Input Channel Left Bass Controller Output Channel REF 1 20 SCL VDD 2 19 SDA AGND 3 18 DGND TREB_L 4 17 OUT_L TREB_R 5 MS6715 RIN 6 15 BOUT_R LOUD_R 7 BIN_R BOUT_R 14 15 Right Bass Controller Input Channel Right Bass Controller Output Channel OUT_R 16 Right Speaker Output OUT_L DGND 17 18 Left Speaker Output Digital Ground SDA SCL 19 20 I2C Data Input I2C Clock Input 16 OUT_R 14 BIN_R NC 8 13 BOUT_L LOUD_L 9 12 BIN_L NC 10 11 LIN SOP20 / SSOP20 ORDERING INFORMATION Package Part number Packaging Marking Transport Media 20-Pin SOP (lead free) MS6715GTR MS6715G 1k Units Tape and Reel 20-Pin SOP (lead free) MS6715GU MS6715G 36 Units Tube 20-Pin SSOP (lead free) MS6715SSGTR MS6715G 2.5k Units Tape and Reel 20-Pin SSOP (lead free) MS6715SSGU MS6715G 56 Units Tube ABSOLUTE MAXIMUM RATINGS Symbol VDD Parameter Supply Voltage Rating Unit 6.5 V VESD Electrostatic Handling -3000 to 3000 V TSTG Storage Temperature Range -65 to 150 ℃ TA Operating Ambient Temperature Range -40 to 85 ℃ TJ Maximum Junction Temperature 150 ℃ TS Soldering Temperature, 10 seconds 260 ℃ RTHJA Thermal Resistance from Junction to Ambient in Free Air SOP20 SSOP20 210 210 ℃/W REV 3 2/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor OPERATING RATINGS Symbol VDD Parameter Supply Voltage Min Typ Max Unit 2.7 - 6.5 V 5V ELECTRICAL CHARACTERISTICS (Ta=25℃, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Parameter Symbol Conditions Min Typ Max Unit - 12.2 12.5 mA 55 60 - dB 35 50 70 kΩ 19 20 - dB -78.75 - 0 dB - 1.25 - dB -0.5 0 1 dB -1 0 5 dB -37.5 - 0 dB - 1.25 - dB Supply IQ Quiescent Current VIN=0V PSRR Power Supply Rejection Ratio CREF = 22uF, f = 100Hz Input RIN Input Resistance LOUD Loudness CLoud=100nF, f =20Hz Volume=-40dB Volume control CRVOL Volume Control Range RESVOL Volume Step Resolution ERRVOL Volume Setting Error Attenuation Av = 0 to -40dB Av = -40 to -60dB Speaker Attenuators CRSPK Speaker Control Range RESSPK Speaker Step Resolution ERRSPK Speaker Setting Error MUTE Output Mute Attenuation Attenuation -0.2 0 0.1 dB - -65 -60 dB -14 - 14 dB - 2 - dB -0.3 0 0.1 dB 34 44 58 kΩ -14 - 14 dB - 2 - dB -0.3 0 0.1 dB Bass Control CRBAS Bass Control Range RESBAS Bass Step Resolution ERRBAS Speaker Setting Error RB Internal Feedback Resistance Boost/Cut f =100Hz Treble Control CRBAS Treble Control Range Boost/Cut RESBAS Treble Step Resolution ERRBAS Treble Setting Error f =20kHz VOMAX Maximum Output Voltage Swing (THD+N)/S <0.3% - 4.5 - Vpp THD+N Total Harmonic Distortion Plus Noise VOUT=2Vpp - -75 0.0177 - dB % S/N Signal-to-Noise Ratio VOUT=4Vpp - 97 - dB CS Channel Separation Left/Right 93 97 - dB VIH Bus High Input Level 2 - - V VIL Bus Low Input Level - - 0.8 V General 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. REV 3 3/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor 2.7V ELECTRICAL CHARACTERISTICS (Ta=25℃, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) Parameter Symbol Conditions Min Typ Max Unit Supply IQ Quiescent Current VIN=0V PSRR Power Supply Rejection Ratio CREF = 22uF, f = 100Hz VOMAX Maximum Output Voltage Swing (THD+N)/S <0.3% THD+N Total Harmonic Distortion Plus Noise VOUT=2Vpp S/N Signal-to-Noise Ratio VOUT=2.5Vpp CS Channel Separation Left/Right - 8.7 9 mA 53 58 - dB - 2.5 - Vpp - -50 - dB General - 0.3 - % 90 94 - dB 90 94 - dB TYPICAL PERFORMANCE CHARACTERISTICS (Ta=25℃, All stages 0dB, f=1kHz, CREF =22uF, refer to the application circuit; unless otherwise specified) VDD=5V Volume=-40dB VDD=5V Loud (dB) Loud (dB) Loud (dB) 100nF OPEN 33nF 10nF 220nF Loudness OFF 56nF VDD=5V CLOUD = 100nF Loudness vs. Volume Loudness vs. Frequency vs. Volume Loudness vs. External Capacitors VDD=5V Treble=Bass= -14~14dB REV 3 VDD=2.7V VIN=-3dBV VDD=5V VIN=0dBV QUIESCENT CURRENT (mA) FREQUENCY (Hz) CHANNEL SEPARATION (dB) FREQUENCY (Hz) Tone (dB) FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) SUPPLY VOLTAGE (V) Typical Tone Response Channel Separation vs. Frequency Quiescent Current vs. Supply Voltage 4/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor VDD=2.7V VO=2Vpp THD+N (%) THD+N (%) THD+N (%) f=1kHz f=20kHz f=20Hz VDD=5V VO=2Vpp f=20kHz f=1kHz VDD=5V 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=10uF VDD=5V VRR=-20dBV PSRR (dB) PSRR (dB) CAP=22uF REV 3 f=20Hz CAP=10uF VDD=2.7V VRR=-20dBV FREQUENCY (Hz) FREQUENCY (Hz) PSRR vs. Frequency PSRR vs. Frequency 5/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor I2C BUS DESCRIPTION Start and Stop Conditions 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 Stop Start 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 change allowed Data line stable, Data valid 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 Acknowledge Start 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. REV 3 6/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor Timing of SDA and SCL Bus Lines SDA tf tLOW SCL S tHD;STA tSU;DAT tr tHD;DAT Standard Mode Symbol fSCL tHD;STA tf tHIGH tSU;STA tSP tSU;STO Sr Parameter tBUF tr P S Min Max Unit 0 100 kHz 4.0 - us tLOW SCL clock frequency Hold time (repeated) START condition. After this period, the first clock pulse is generated LOW period of the SCL clock 4.7 - us tHIGH HIGH period of the SCL clock 4.0 - us tSU:STA 4.7 - us 0 3.45 us tSU:DAT Set-up time for a repeated START condition Data hold time: For I2C-bus devices Data-set-up time 250 - ns tr Rise time of both SDA and SCL signals - 1000 ns tf Fall time of both SDA and SCL signals - 300 ns tSU:STO Set-up time for STOP condition 4.0 - us tBUF Bus free time between a STOP and START condition 4.7 - us Cb Capacitive load for each bus line - 400 pF VnL Noise margin at the LOW level for each connected device (including 0.1VDD hysteresis) - V VnH Noise margin at the HIGH level for each connected device (including 0.2VDD hysteresis) - V tHD:STA tHD:DAT 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 REV 3 MS6715 7/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor Interface Protocol 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 ADDRESS W R / -- 9 1-7 8 9 1-7 8 9 S P START CONDITION 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 7 bits address W 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 LSB Function 0 0 B2 B1 B0 A2 A1 A0 Volume Control 1 0 0 B1 B0 A2 A1 A0 Speaker ATT L 1 0 1 B1 B0 A2 A1 A0 Speaker ATT R 0 1 0 * * L * * Loudness Control 0 1 1 0 C3 C2 C1 C0 Bass Control 0 1 1 1 C3 C2 C1 C0 Treble Control Where Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; * = No effect REV 3 8/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor Volume MSB 0 0 0 0 B2 B1 B0 LSB Function A2 A1 A0 Volume 1.25 dB steps 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 A2 A1 A0 Volume 10dB steps B2 B1 B0 0 0 0 0 0 0 1 -10 0 1 0 -20 0 1 1 -30 1 0 0 -40 1 0 1 -50 1 1 0 -60 1 1 1 -70 The default volume is –78.75dB. Speaker Attenuator MSB LSB Function（ （dB） ） 1 0 0 B1 B0 A2 A1 A0 Speaker ATT L 1 0 1 B1 B0 A2 A1 A0 Speaker ATT R 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 0 0 0 0 1 -10 1 0 -20 1 1 -30 1 1 1 1 1 Mute The default state is mute. REV 3 9/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor Loudness MSB 0 1 0 X X L X LSB Function X Loudness 0 Loudness ON 1 Loudness OFF The default state is loudness off. X: don’t care. Bass and Treble MSB LSB Function（ （dB） ） 0 1 1 0 C3 C2 C1 C0 Bass 0 1 1 1 C3 C2 C1 C0 Treble 0 0 0 0 -14 0 0 0 1 -12 0 0 1 0 -10 0 0 1 1 -8 0 1 0 0 -6 0 1 0 1 -4 0 1 1 0 -2 0 1 1 1 0 1 0 0 0 0 1 0 0 1 2 1 0 1 0 4 1 0 1 1 6 1 1 0 0 8 1 1 0 1 10 1 1 1 0 12 1 1 1 1 14 The default state is bass 0dB and treble 0dB. REV 3 10/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor Examples Set Volume at –37.5dB. MSB Start Data byte LSB MS6715 Address ACK 0 0 0 1 1 1 -30dB 1 0 ACK Stop 0 ACK Stop 1 1 ACK Stop X X ACK Stop -7.5dB Set Speaker Right at -30dB. MSB Start Data byte LSB MS6715 Address ACK 1 0 1 1 Speaker R 1 0 -30dB 0 0dB Set Speaker Left in mute-on. MSB Start Data byte LSB MS6715 Address ACK 1 0 0 1 1 Speaker L 1 Mute Set Loudness in turn-on. MSB Start Data byte LSB MS6715 Address ACK 0 1 0 X X 0 X : doncare Loudness ON Set Treble at -10dB. MSB Start MS6715 Address Data byte LSB ACK 0 1 1 Treble REV 3 1 0 0 1 0 ACK Stop -10dB 11/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor APPLICATION INFORMATION Basic Application Example 5.6K MCU 100n 100n 18 20 9 100n 12 TREB_L BIN_L BOUT_L 10u 17 MS6715 10u RIN OUTPUT OUT_R 16 2.2u 22u 15 100n TREB_R 7 1 BIN_R BOUT_R LOUD_R 3 REF AGND AVDD 2 AVDD 2.7n 4 OUT_L LIN INPUT 6 13 LOUD_L SCL SDA DGND 2.2u 11 19 14 100n 100n 5 2.7n 5.6K REV 3 12/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor EXTERNAL DIMENSIONS SSOP20 D Detail A Symbol E1 A A1 A2 b c e D E E1 L h L1 ZD R1 R θ θ1 θ2 E H x 45 c ZD A2 A θ2 e b A1 θ1 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 o 0 8 0 8 o o 0 0 o o o o 5 15 5 15 R1 L1 R θ L Detail A SOP20 (300mil) D Detail A Symbol E A A1 B C e D E H L h θ H h x 45 C 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 o 8 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 o o 0 8 A A1 e 0.25mm B θ L Detail A REV 3 13/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor DEMO BOARD The demo board used IR technique controller to control the MS6715. The default states of demo board are Volume -20dB, Attenuator Speakers 0dB, Loudness Off, Bass 0dB and Treble 0dB. 1 2 3 5 1 4 Label 1: Supply Voltage The AVDD and DVDD should be the same supply voltage, the supply range is 2.7~6.5 VDC. Label 2: LED Indicator The LED indicates the power status and the IR received status. It is red-dark blink once when the MCU has received the function code correctly. Label 3: Output Section Please connected to a post-power-amplifier, as active speaker. Label 4: Input Section Please input stereo audio signal, as music or sine wave. Label 5: MCU Reset The MS6715 will be loaded the default values by MCU. The default states of demo board are Volume -20dB, Attenuator Speakers 0dB, Loudness Off, Bass 0dB and Treble 0dB. REV 3 14/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor IR Controller VOL+, VOL- : The volume control keys. The volume control in 1.25dB/step as the switch is pressed once, the range is –79dB to 0dB. ATTLF+, ATTLF- : The attenuation control keys for left speaker output. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. ATTRF+, ATTRF- : The attenuation control keys for right speaker output. The attenuation in 1.25dB/step as the switch is pressed once, the range is -37.5dB to 0dB. TRE+, TRE- : The treble control keys. The treble control in 2dB/step as the switch is pressed once, the range is –14dB to 14dB. BAS+, BAS- : The bass control keys. The bass control in 2dB/step as the switch is pressed once, the range is -14dB to 14dB. Loud : The loudness key Press the key once to set loudness on or loudness off. Mute : The mute key controls all speaker outputs Press the key once to set mute-on or mute-off. REV 3 15/16 www.mosanalog.com MS6715 MOSA 1 Stereo Input / 1 Stereo Output Audio Processor Circuit J1 R1 DVCC 1 2 C20 + DVCC 10u RX TX RST C4 + IR_IN Y1 12M AVDD SCL SDA C5 RST P3.0 P3.1 XTAL2 XTAL1 P3.2 P3.3 P3.4 P3.5 GND 2 1 + 20P AVDD C22 + + C6 0.1u 10u Vcc P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 P3.7 20 19 18 17 16 15 14 13 12 11 AT89C2051 U2 1 REF 2 VDD 3 AGND 4 TREB_L 5 TREB_R 6 RIN 7 LOUD_R 8 NC 9 LOUD_L 10 NC INPUT 1 2 3 3 VS + C23 0.1u J8 10u C9 IR_IN + + + C16 C17 2.7n 2.7n + IR IR D1 IN1 J5 SCL SDA DGND LOUT ROUT BOUT_R BIN_R BOUT_L BIN_L LIN + C15 22u 1 + C3 470p MS6715 10u C10 + GND U1 1 2 3 4 5 6 7 8 9 10 RX TX 10K 20P IN3 J2 + OUT 1 2 3 LCD J6 C1 47u R3 10K 2 R4 J4 R2 1K 20 19 18 17 16 15 14 13 12 11 SCL SDA J7 + 1 2 3 + C2 10u S1 C21 0.1u 10u C7 + J3 220 + 10u C11 + C12 + C13 + C14 + 0.1u 0.1u 0.1u 0.1u C8 OUTPUT + C18 C19 0.1u 0.1u R5 5.6K R6 5.6K W1 Jumper REV 3 16/16 www.mosanalog.com