MS6257

MOSA MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC Gain and Attenuation Volume Controller IC One Set of Stereo Input, Low voltage Gain and Attenuation 15~-79dB FEATURES ‧Operation range: 2.7V~5.5V ‧Low power consumption ‧Gain/Attenuation: 15dB to –79dB at 1dB/step ‧Housed in 8 pin SOP package ‧I2C interface APPLICATIONS ‧Multimedia system ‧Hi-Fi audio system ‧MP3, PDA ‧Cross-reference PT2257, PT2259 DESCRIPTION The MS6257 is the stereo audio volume controller IC. It uses CMOS technology specially for the low voltage application with low noise, rail-to-rail output. The MS6257 provide an I2C control interface with gain / attenuation range of 15dB to –79dB, 1dB/step. The initial condition is set to be maximum attenuation –79dB and mute on mode when the power is up. PIN CONFIGURATION Symbol L-IN L-OUT VSS SDA SCL VDD R-OUT R-IN Pin 1 2 3 4 5 6 7 8 Description Left channel input Left channel output Ground I2C data input I2C clock input Positive supply voltage Right channel output Right channel input L-IN 1 L-OUT 2 VSS 3 SDA 4 8 R-IN MS6257 7 R-OUT 6 VDD 5 SCL BLOCK DIAGRAM L-IN 1dB/STEP -1dB/STEP -10dB/STEP L-OUT Serial Bus Decoder and Latches R-IN 1dB/STEP -1dB/STEP -10dB/STEP REF R-OUT I2C Interface Reference Circuit SDA REV 1 SCL 1 www.mosanalog.com.tw MOSA ORDERING INFORMATION Package 8-Pin SOP 8-Pin SOP 8-Pin SOP (lead free) 8-Pin SOP (lead free) Part number MS6257TR MS6257U MS6257GTR MS6257GU MS6257 MS6257 MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC Packaging Marking Transport Media 2.5k Units Tape and Reel 100 Units Tube 2.5k Units Tape and Reel 100 Units Tube MS6257G MS6257G 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 SOP8 Parameter Rating 6 -4500 to 4500 -65 to 150 -40 to 85 150 260 210 Unit V V ℃ ℃ ℃ ℃ ℃/W OPERATING RATINGS Symbol VDD Supply Voltage Parameter Min 2.7 Typ Max 5.5 Unit V REV 1 2 www.mosanalog.com.tw MOSA 5V ELECTRICAL CHARACTERISTICS MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC (VDD=5.0V, VSS=0V, Attenuation=0dB, Gain=0dB, f=1KHz, VO=0dBV; unless otherwise specified) Symbol Parameter Conditions Min Typ Max DC Characteristics IQ AGA ASTEP EGA EIGA CS MUTE Rin Rout Vo THD+N S/N VIH VIL Quiescent current Gain/Attenuation Gain/Attenuation step Gain/Attenuation step error Interchannel gin/attenuation error Channel separation Mute Attenuation Input Impedance Output Impedance Maximum output voltage swing Total harmonic distortion plus noise Signal-to-noise ratio Bus high input level Bus low input level V O= 4 . 5 V p p (THD+N)/S < 0.1% Vin=0dBV Max gain Max attenuation 120 18 95 0.3VDD 3.1 15 -79 1 0.3 0.3 130 85 20 50 4.8 -68 100 3.5 100 -63 0.7VDD - Unit mA dB dB dB dB dB dB dB kΩ Ω Vpp dB dB V V AC Characteristics Bus Characteristics 3.3V ELECTRICAL CHARACTERISTICS (VDD=3.3V, VSS=0V, Attenuation=0dB, Gain=0dB, f=1KHz, VO=-3dBV; unless otherwise specified) Symbol Parameter Conditions Min Typ Max DC Characteristics IQ CS MUTE Vo THD+N S/N Quiescent current Channel separation Mute Attenuation Maximum output voltage swing Total harmonic distortion plus noise Signal-to-noise ratio Vin=-3dBV (THD+N)/S < 0.1% 90 85 2.8 110 80 3 -63 90 3.3 -58 mA dB dB Vpp dB dB Unit AC Characteristics REV 1 3 www.mosanalog.com.tw MOSA 2.7V ELECTRICAL CHARACTERISTICS MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC (VDD=2.7V, VSS=0V, Attenuation=0dB, Gain=0dB, f=1KHz, VO=-3dBV; unless otherwise specified) Symbol Parameter Conditions Min Typ Max DC Characteristics IQ CS MUTE Vo THD+N S/N Quiescent current Channel separation Mute Attenuation Maximum output voltage swing Total harmonic distortion plus noise Signal-to-noise ratio Vin=-3dBV (THD+N)/S < 0.3% 95 85 2.5 105 80 2 -60 90 2.9 -55 - Unit mA dB dB Vpp dB dB AC Characteristics TYPICAL PERFORMANCE CHARACTERISTICS (Ta=25℃, RL=32Ω; unless otherwise specified) f=20Hz f=20Hz f=20Hz THD+N (%) THD+N (%) f=1kHz f=1kHz f=20kHz f=20kHz THD+N (%) f=1kHz f=20kHz VDD=5V VDD=3.3V VDD=2.7V OUTPUT VOLTAGE (dBV) OUTPUT VOLTAGE (dBV) OUTPUT VOLTAGE (dBV) THD+N vs. output voltage THD+N vs. output voltage THD+N vs. output voltage CHANNEL SEPARATION (dB) VDD=3.3V VO=-3dBV VDD=2.7V VO=-3dBV VDD=2.7V VO=-3dBV VDD=3.3V VO=-3dBV VDD=5V VO=0dBV VDD=5V VO=0dBV FREQUENCY (Hz) FREQUENCY (Hz) QUIESCENT CURRENT (mA) THD+N (%) SUPPLY VOLTAGE (V) THD+N vs. frequency Channel separation vs. frequency Quiescent current vs. supply voltage REV 1 4 www.mosanalog.com.tw MOSA I2C BUS DESCRIPTION Start and stop conditions MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC 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. REV 1 5 www.mosanalog.com.tw MOSA Timing of SDA and SCL bus lines SDA tf SCL MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC 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) REV 1 6 www.mosanalog.com.tw MOSA BUS INTERFACE MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC Data are transmitted to and from the MCU to the MS6257 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 MS6257 Interface protocol The format consists of the following ‧A START condition ‧A chip address byte including the MS6257 address. (7bits) ‧The 8th bit of the byte must be “0”.(write=0, read=1) ‧MS6257 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 R / -W ACK DATA ACK DATA ACK P STOP CONDITION Protocol Address 1 0 0 0 1 0 0 0 W 7 bits address MS6257 address REV 1 7 www.mosanalog.com.tw MOSA Data bytes description Function bits MSB 1 1 1 1 1 0 0 1 0 0 0 1 1 1 0 0 0 0 1 1 1 1 1 0 1 1 1 1 1 0 1 0 1 1 1 0 0 1 0 1 0 0 1 1 1 A3 0 A3 0 A3 0 C3 C3 C3 1 1 A2 B2 A2 B2 A2 B2 C2 C2 C2 0 1 A1 B1 A1 B1 A1 B1 C1 C1 C1 0 LSB 1 A0 B0 A0 B0 A0 B0 C0 C0 C0 M MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC Function description Function OFF (-79dB) 2-channel, -1dB/step 2-channel, -10dB/step Left channel, -1dB/step Left channel, -10dB/step Right channel, -1dB/step Right channel, -10dB/step 2-channel, +1dB/step Left channel, +1dB/step Right channel, +1dB/step 2-channel, MUTE When M=1, MUTE=ON When M=0, MUTE=OFF Gain / Attenuation bits A3 C3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A2 B2 C2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A1 B1 C1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A0 B0 C0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 A 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 Gain / Attenuation value (dB) B 0 -10 -20 -30 -40 -50 -60 -70 C 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +11 +12 +13 +14 +15 1. Where Ax=-1dB/step, Bx=-10dB/step, Cx=+1dB/step REV 1 8 www.mosanalog.com.tw MOSA Example Mute off MSB Start 1 0 0 0 1 0 0 LSB 0 ACK 0 1 1 Data byte 1 1 0 MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC 0 0 Stop MS6257 address 2-ch, Mute off The initial condition is –79dB and mute on when power up. The first command must disable the mute function. Set gain of 2 channel at 0dB Start MS6257 Address ACK 1 1 1 0 0 0 0 0 ACK 1 1 0 1 0 0 0 0 ACK 2-ch, -10dB/step, 0dB 1 1 0 0 0 0 0 0 ACK Stop 2-ch, -1dB/step, 0dB 2-ch, +1dB/step, 0dB Set gain of 2 channel at 6dB The value of attenuation must be set zero when the volume from attenuation to gain. Start MS6257 Address ACK 1 1 1 0 0 0 0 0 ACK 1 1 0 1 0 0 0 0 ACK 2-ch, -10dB/step, 0dB 1 1 0 0 0 1 1 0 ACK Stop 2-ch, -1dB/step, 0dB 2-ch, +1dB/step, 6dB Set gain of 2 channel at -3dB The value of gain must be set zero when the volume from gain to attenuation. Start MS6257 Address ACK 1 1 0 0 0 0 0 0 ACK 1 1 1 0 0 0 0 0 ACK 2-ch, +1dB/step, 0dB 1 1 0 1 0 0 1 1 ACK Stop 2-ch, -10dB/step, 0dB 2-ch, -1dB/step, -3dB Set attenuation of left channel at –33dB Start MS6257 Address ACK 1 0 1 1 0 0 1 1 ACK 1 0 1 0 0 0 1 1 ACK Stop L-ch, -10dB/step, -30dB L-ch, -1dB/step, -3dB REV 1 9 www.mosanalog.com.tw MOSA APPLICATION INFORMATION Basic application example MS6257 4 MCU 5 SCL MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC SDA VDD 6 0.1uF 47uF Supply 2.7~5V VSS 3 10uF 10uF 1 L-IN L-OUT 2 10k Power Amplifier Signal 10uF 8 R-IN R-OUT 7 10uF 10k Basic application flow chart Procedure Of Power Up Procedure Of Power Shut Down Power up VDD = 5V Volume Control volume down to -79 dB step by step Initial Conditions function off (-79dB) mute on Enable Mute Function mute on Disable Mute Function mute off Power down VDD = 0V Volume Control volume up/down step by step 1. The initial condition is –79dB and mute on when power up. REV 1 10 www.mosanalog.com.tw MOSA EXTERNAL DIMENSIONS SOP8 package MS6257 GAIN AND ATTENUATION VOLUME CONTROLLER IC 8 5 Symbol Dimension in mm Min Max 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 5.80 6.20 3.80 4.00 1.27 BSC 0.40 1.27 Dimension in inch Min Max 0.0532 0.0688 0.0040 0.0098 0.013 0.020 0.0075 0.0098 0.1890 0.1968 0.2284 0.2440 0.1497 0.1574 0.050 BSC 0.016 0.050 H E 1 4 D A A1 B C D H E e L L A A1 e B C TAPE AND REEL (Unit : mm) 2.0 0.30 0.05 4.0 1.75 0.3R MAX 5.5 0.05 12.0 0.3 5.4 0.05 1.5+0.1/-0.0 DIA 3.0 3.6 6.9 8.0 1.5 MIN 0.5 Radius Typical 2.0 1.7 REV 1 11 www.mosanalog.com.tw