MS6282 MOSA | Alldatasheet

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Technical content

Volume Controller with soft step IC V1.1 1/15 www.mosanalog.com Class AB Stereo Headphone Driver, Low voltage Volume Controller -79~+15dB With Soft Step Input Gain 0~+15dB

FEATURES

‧ Operation range: 2.5V~6.5V. ‧ Soft step volume control ：y79dB ~ +15dB. ‧ Input Gain: 0dB ~ +15dB. ‧ Low power consumption. ‧ Good PSRR and low pop noise. ‧ I2C interface. ‧ Housed in 10 pin MSOP package.

APPLICATIONS

‧ Multimedia system. ‧ HiyFi audio system. ‧ Bluetooth. ‧ DAB

DESCRIPTION

The MS6282 is a class AB headphone drivers with audio volume controller, It has Input gain(0 ~ +15dB), Soft step volume control(y79dB ~ +15dB) with programmable blend times. It uses CMOS technology specially for the low voltage application with low noise, railytoyrail output. BLOCK DIAGRAM SDA SCL R-OUT L-OUT I2C Interface Gain 0dB~15dB R-IN L-IN MS6282 Input Gain -79dB ~ +15dB Volume/Mute (With Soft step) Gain 0dB~15dB Input Gain -79dB ~ +15dB Volume/Mute (With Soft step) HP HP Supply VREF GND VDD

Volume Controller with soft step IC V1.1 2/15 www.mosanalog.com PIN CONFIGURATION Symbol Pin Description NC 1 No Connected LyIN 2 Left Channel Input LyOUT 3 Left Channel Output VSS 4 Ground SDA 5 I 2C Data Input SCL 6 I 2C Clock Input VDD 7 Positive Supply Voltage RyOUT 8 Right Channel Output RyIN 9 Right Channel Input VREF 10 Reference Voltage = 1/2V DD

ORDERING INFORMATION

Package Part number Packaging Marking Transport Media 10yPin MSOP (lead free) MS6282MGTR 6282G 3.5k Units Tape and Reel 10yPin MSOP (lead free) MS6282MGU 6282G 80 Units Tu be RoHS Compliance ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit VDD Supply Voltage 6.5 V VESD Electrostatic Handling y3000 to 3000 V TSTG Storage Temperature Range y65 to 150 ℃ TA Operating Ambient Temperature Range y40 to 85 ℃ TJ Maximum Junction Temperature 120 ℃ TS Soldering Temperature, 10 seconds 260 ℃ RTHJA Thermal Resistance from Junction to Ambient in Free Air MSOP10 165.9 /W℃ OPERATING RATINGS Symbol Parameter Min Typ Max Unit VDD Supply Voltage 2.5 y 6.5 V

Volume Controller with soft step IC V1.1 3/15 www.mosanalog.com 5V ELECTRICAL CHARACTERISTICS (Ta=25 ℃;VDD =5V, V SS =0V; C REF = 1uF ; R L=32 Ω ; refer to the application circuit; unless otherwise specified) Symbol Parameter Conditions Min Typ Max Unit Supply IQ Quiescent Current V IN =0V y 5.6 6.2 mA IPD Power down current V IN =0V y 130 y uA PSRR Power Supply Rejection Ratio f = 100Hz 55 58 y dB Input Selectors RIN Input Resistance 100 kΩ GIN Input Gain Range Gain 0 y 15 dB GSTEP Step Resolution y 1 y dB ERR G Gain Setting error y0.2 0 0.2 dB Volume control CR VOL Volume Control Range Attenuation & Gain y79 y +15 d B RES VOL Volume Step Resolution y 1 y dB ERR VOL Volume Setting Error Av = +15 to y40dB y0.5 0 1 dB Av = y40 to y79dB y1 0 5 dB MUTE Mute Attenuation Vin=0dBV y90 dB General VO MAX Maximum Output Voltage Swing (THD+N)/S <0.1% y 1.45 y Vrms THD+N Total Harmonic Distortion Plus Noise VOUT = 1Vrms y y64 y dB y 0.063 y % S/N SignalytoyNoise Ratio V OUT = 1Vrms y 93 y dB Bus Input VIH Bus High Input Level 1.8 y y V VIL Bus Low Input Level y y 0.8 V 3.3V ELECTRICAL CHARACTERISTICS (Ta=25 ℃;VDD =3.3V, V SS =0V; C REF = 1uF ; R L=32 Ω ; refer to the application circuit; unless otherwise specified) Symbol Parameter Conditions Min Typ Max Unit Supply IQ Quiescent Current V IN =0V y 4.7 5.2 mA IPD Power down current V IN =0V y 82 y uA PSRR Power Supply Rejection Ratio f = 100Hz 65 70 y dB General VOMAX Maximum Output Voltage Swing (THD+N)/S <0.1% y 1 y Vrms THD+N Total Harmonic Distortion Plus Noise VOUT = 0.707Vrms y y65 y dB y 0.056 y % S/N SignalytoyNoise Ratio V OUT = 0.707Vrms y 90 y dB

Volume Controller with soft step IC V1.1 4/15 www.mosanalog.com 2.5V ELECTRICAL CHARACTERISTICS (Ta=25 ℃;VDD =2.5V, V SS =0V; C REF = 1uF ; R L=32 Ω ; refer to the application circuit; unless otherwise specified) Symbol Parameter Conditions Min Typ Max Unit Supply IQ Quiescent Current V IN =0V y 3.3 3.6 mA IPD Power down current V IN =0V y 60 y uA PSRR Power Supply Rejection Ratio f = 100Hz 60 65 y dB General VO MAX Maximum Output Voltage Swing (THD+N)/S <0.1% y 0.707 y Vrms THD+N Total Harmonic Distortion Plus Noise VOUT = 0.707Vrms y y65 y dB y 0.056 y % S/N SignalytoyNoise Ratio V OUT = 0.707Vrms y 90 y dB

Volume Controller with soft step IC V1.1 5/15 www.mosanalog.com TYPICAL PERFORMANCE CHARACTERISTICS (Ta=25 ℃; RL= 32 Ω ; CREF =1uF ; refer to the application circuit ; unless otherwise specified) THD+N (%) OUTPUT VOLTAGE (dBV) THD+N (%) OUTPUT VOLTAGE (dBV) THD+N (%) OUTPUT VOLTAGE (dBV) THD+N vs. output voltage THD+N vs. output voltage THD+N vs. output voltage THD+N (%) FREQUENCY (Hz) Attenuation (dB) FREQUENCY (Hz) QUIESCENT CURRENT (mA) SUPPLY VOLTAGE (V) THD+N vs. frequency Mute vs. frequency Quiescent current vs. supply voltage PSRR (dB) FREQUENCY (Hz) PSRR (dB) FREQUENCY (Hz) PSRR (dB) FREQUENCY (Hz) PSRR vs. frequency PSRR vs. frequency PSRR vs. frequency VDD =5V f=1kHz f=20Hz f=20kHz VDD =3.3V f=1kHz f=20Hz f=20kHz VDD =2.5V f=1kHz f=20Hz f=20kHz CAP=1uF VDD = 5V VRR =-20dBV CAP=10uF VDD = 3.3V VRR =-20dBV CAP=1uF CAP=10uF CAP=1uF VDD = 2.5V VRR =-20dBV CAP=10uF VDD =5V V O=0dBV VDD =3.3V V O=-3dBV VDD =2.5V VO=-3dBV

Volume Controller with soft step IC V1.1 6/15 www.mosanalog.com 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. SDA SCL 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 pullydown (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 SDA MSB Acknowledge 1 2 3 7 8 9 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 (9 th ) clock pulse. In this case, the master transmitter can generate the STOP information in order to abort the transfer.

Volume Controller with soft step IC V1.1 7/15 www.mosanalog.com BUS INTERFACE Data are transmitted to and from the MCU to the MS6282 via the SDA and SCL. The SDA and SCL make up the BUS interface. It should be noted that pullyup resistors must be connected to the positive supply voltage. Interface protocol The format consists of the following

  • A START condition
  • A chip address byte including the MS6282 address. (7bits)
  • The 8 th bit of the byte must be “0”.
  • The MS6282 must always acknowledge the end of each transmitted byte.
  • A data sequence (Nybytes + Acknowledge)
  • A STOP condition Chip Address The chip address of the MS6282 is 88H. 1 0 0 0 0 01 0 MS6282 address

Volume Controller with soft step IC V1.1 8/15 www.mosanalog.com SubAddress MSB LSB Function A7 A6 A5 A4 A3 A2 A1 A0 0 0 0 0 0 0 0 0 Softystep time / ON/OFF 0 0 0 0 0 0 0 1 Lychannel Input Gain Control 0 0 0 0 0 0 1 0 Rychannel Input Gain Control 0 0 0 0 0 0 1 1 Both channels Input Gain Control 0 0 0 0 0 1 0 0 Lychannel Volume Control 0 0 0 0 0 1 0 1 Rychannel Volume Control 0 0 0 0 0 1 1 0 Both channels Volume Control 0 0 0 0 0 1 1 1 Power management Soft-step time / ON / OFF (0H) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 Soft-step Time 1 0 0 0 0.64ms 1 0 0 1 1.28ms 1 0 1 0 2.56ms 1 0 1 1 5.12ms 1 1 0 0 10.24ms 1 1 0 1 20.48ms 1 1 1 0 40.96ms 1 1 1 1 81.92ms Soft-step 1 0 On 1 1 Off The initial condition is Softystep Off, Softystep time 40.96ms.

Volume Controller with soft step IC V1.1 9/15 www.mosanalog.com Input Gain Control (01H , 02H , 03H) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 Gain 1 1 0 0 0 0 0dB 1 1 0 0 0 1 1dB 1 1 0 0 1 0 2dB 1 1 0 0 1 1 3dB 1 1 0 1 0 0 4dB 1 1 0 1 0 1 5dB 1 1 0 1 1 0 6dB 1 1 0 1 1 1 7dB 1 1 1 0 0 0 8dB 1 1 1 0 0 1 9dB 1 1 1 0 1 0 10dB 1 1 1 0 1 1 11dB 1 1 1 1 0 0 12dB 1 1 1 1 0 1 13dB 1 1 1 1 1 0 14dB 1 1 1 1 1 1 15dB The initial condition 14dB. We suggest the gain is set as the power is up. For example, set and fix the gain +10dB, the volume range will be controlled from y69dB to +25dB. Volume Control (04H , 05H , 06H) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 1 1 1 1 ＋15dB 0 0 0 1 1 1 0 ＋14dB : : : : : : : : 0 0 0 0 0 0 0 0dB 0 0 1 0 0 0 0 0dB 0 0 1 0 0 0 1 － 1dB : : : : : : : : 0 0 1 1 1 1 1 －15dB 0 1 0 0 0 0 0 －16dB : : : : : : : : 0 1 0 1 1 1 1 －31dB 0 1 1 0 0 0 0 －32dB : : : : : : : : 0 1 1 1 1 1 1 －47dB 1 0 0 0 0 0 0 －48dB : : : : : : : : 1 0 0 1 1 1 1 －63dB 1 0 1 0 0 0 0 －64dB : : : : : : : : 1 0 1 1 1 1 1 －79dB 1 1 X X X X X Mute The initial condition is Mute.

Volume Controller with soft step IC V1.1 10/15 www.mosanalog.com Power management (07H) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 Release of V REF to GND. 1 Set the voltage of V REF to VDD /2.

0 X All devices Active

The initial condition is Power down , VREF = GND. Example Softystep Time 10.24ms , Softystep ON Set the 1/2V DD , All device active. Set Input gain of both channels at +4dB Set Volume of bothychannels at y15dB

Volume Controller with soft step IC V1.1 11/15 www.mosanalog.com Soft-step volume When the volumeylevel is changed audible clicks could appear at the output. The root cause of those clicks could be the sudden change of the envelope of the audio signal. With the Softystep feature, this click could be reduced to a minimum. Softystep supports N dB volume change, including mute. Example Soft-Step Time = 5.12ms 0dB /barb2right/barb2right /barb2right/barb2right -16dB /barb2right/barb2right /barb2right/barb2right 0dB Vin = 1Vrms @ 1KHz Vin = 1Vrms @ 2KHz

Volume Controller with soft step IC V1.1 12/15 www.mosanalog.com +8dB /barb2right/barb2right /barb2right/barb2right -16dB /barb2right/barb2right /barb2right/barb2right +8dB Vin = 0.5Vrms @ 1KHz 0dB /barb2right/barb2right /barb2right/barb2right Mute /barb2right/barb2right /barb2right/barb2right0dB Vin = 1Vrms @ 1KHz

Volume Controller with soft step IC V1.1 13/15 www.mosanalog.com

APPLICATION INFORMATION

6 SCL

10uF 0.1uF MS6282 L-IN 2 2.2uF Stereo Signal L-OUT 6 100uF R-OUT 8 100uF VREF 1uF R-IN 9 2.2uF 1 NC Headphone Headphone

Volume Controller with soft step IC V1.1 14/15 www.mosanalog.com Basic application flowchart [Volume down to mute] volume down to mute step by step [Power Down Preparation] 07H, 00H Wait 0.5 sec [Power off] VDD = 0V [All device power down] 07H, 06H Power off Power Up [Initial Conditions] INPUT GAIN14dB, Mute Powerdown, Vref = 0V [Pop Noise Free] wait 0.5 sec [Set the default function] Input Gain Soft-step Time,ON/OFF [Power up] VDD = 5V [All device Active] 07H,01H Wait 0.5 sec [Volume Control] volume up/down

Volume Controller with soft step IC V1.1 15/15 www.mosanalog.com EXTERNAL DIMENSIONS MSOP10 package A A1 B CL D H E e TAPE AND REEL (Unit : mm) 3.0 3.6 12.0 6.9 8.0 5.5 1.75 5.4 2.0 4.0 1.5+0.1/-0.0 DIA 0.5 Radius Typical1.5 MIN 0.30 0.3R MAX 1.72.0 0.05 0.05 0.05 0.3 Symbol Dimension in mm Dimension in inch Min Max Min Max A 0.81 1.12 0.032 0.044 A1 0.05 0.15 0.002 0.006 A2 0.76 0.97 0.030 0.038 B 0.15 0.20 0.006 0.012 C 0.13 0.23 0.005 0.009 D 2.90 3.10 0.114 0.122 H 4.70 5.10 0.185 0.201 E 2.90 3.10 0.114 0.122 e 0.50 0.0197 L 0.40 0.66 0.016 0.026