MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function FEATURES ‧Fast setting time permits 2*, 4*, and 8* oversampling (serial input) or double speed operation at 4* oversampling ‧Audio format：I2S, Right justified。 ‧The minimum HIGH voltage of digital clocks(WS,DATA and BCK)and the control inputs can be 1.6V at Vdd = 5V. ‧Excellent Power Supply Rejection Ratio(PSRR) ‧Low power consumption ‧Shutdown function ‧Output voltages can be adjusted by the external resisters ‧ Housed in 24 pin SSOP(150mil), QFN(4x4x0.8)packages ‧Operation range: 2.7V~6.5V ‧16-bit resolution audio DAC ‧Output mode : Speaker( BTL)/Headphone(SE) ‧Output power, THD+N=1% Mode RL 5V 3.3V 2.7V 4Ω 1.8W 0.72W 450mW BTL 8Ω 1.2W 0.52W 330mW 8Ω 0.3W 125mW 85mW SE 32Ω 90mW 43mW 25mW ‧Component less ‧No zero crossing distortion APPLICATIONS ‧Multimedia system, Portable Digital Audio. DESCRIPTION The MS6337 is a 16-bits voltage-output Digital-to-Analog Converter (DAC) integrated class AB stereo headphone driver and mono speaker power amplifier. It can drive 1.8W of continuous average power into a mono 4Ω bridged-tied (BTL) speaker or 2 * 90mW into stereo 32Ω single ended (SE) headphone. The 16-bit DAC supports popular formats as I2S, Right Justified. The MS6337 is with the excellent Power Supply Rejection Ratio(PSRR) and features extremely low power dissipation, small package size and easy application. The accuracy of the matched coarse current sources, combined with the unique symmetrical decoding method, preclude zero-crossing distortion and ensures high quality audio reproduction. These unique features, combined with its exceptional performance, make the MS6337 ideally suited for use in digital audio equipment. BLOCK DIAGRAM DV DD Shutdown control SD Mode SD Status 0 0 1 1 0 1 0 1 Shutdown Active Active Shutdown Format control FORMAT Status 0 1 I2S RJF DAC control DACSD 0 1 Status Shutdown Active CAP control Status CAP_DC 0 Discharge 1 Charge REV 2 LIN DVss MS6337 V DD Supply WS 400K A1 + BCK DAC LOUT/BTL400K DATA A2 + FORMAT(I2S/RJF) DAC_SD DAC Shutdown BTL+ V DD 400K B1 + HPIN ROUT Mono / Stereo Mode Switching Circuitry SD SD_MODE CAP 400K Click/Pop Reduction Bias Power Amplifier Supply 390K CAP_DC 1/20 RIN PV DDL PV DDR PV SSL Supply PV SSR AV DD AV SS www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function PIN CONFIGURATION SSOP24 Symbol Pin Description PVDDL 1 Positive supply voltage for left channel of power amplifier LOUT/BTL- 2 SE left channel output or negative output of BTL AVSS 3 Negative supply voltage PVSSL 4 Negative supply voltage for left channel of power amplifier LIN 5 Left channel input SD_MODE 6 SD 7 AVSS 8 The shutdown mode selects the shutdown logic level of the SD pin. SD_MODE = 0, the device is shutdown when SD is logic low. SD_MODE = 1, the device is shutdown when SD is logic high. Negative supply voltage DVSS 9 Digital Ground /DAC_SD 10 DAC shutdown pin. /DAC_SD=0, DAC is shutdown. /DAC_SD=1, DAC is Active. DATA 11 Audio data input WS 12 Audio word select input BCK 13 Audio bit clock input FORMAT 14 Audio format. FORMAT=0, I2S format. DVDD 15 Digital Positive supply voltage AVDD 16 Analog Positive supply voltage /CAP_DC 17 HPIN 18 CAP 19 CAP discharge. This pin is functional only as the system is shutdown. Headphone input detection.(refer to Page.14 for detection levels) A logical low sets BTL mode, a logical high sets SE mode. Capacitor connected FORMAT=1, Right justified format. RIN 20 Right channel input PVSSR 21 Negative supply voltage for right channel of power amplifier ROUT 22 SE right channel output PVDDR 23 Positive supply voltage for right channel of power amplifier BTL+ 24 Positive output of BTL PVDDL 1 24 BTL+ LOUT/BTL- 2 23 PVDDR AVSS 3 22 ROUT PVSSL 4 21 PVSSR LIN 5 20 RIN SD_MODE 6 19 CAP SD 7 18 HPIN AVSS 8 17 CAP_DC DVSS 9 16 AVDD DAC_SD 10 15 DVDD DATA 11 14 FORMAT WS 12 13 BCK MS6337, SSOP24 REV 2 2/20 www.mosanalog.com MOSA QFN20 Symbol MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function Pin Description AVDD 1 Analog Positive supply voltage /CAP_DC 2 HPIN 3 CAP 4 CAP discharge. This pin is functional only as the system is shutdown. Headphone input detection.(refer to Page.14 for detection levels) A logical low sets BTL mode, a logical high sets SE mode. Capacitor connected RIN 5 Right channel input PVSSR 6 Negative supply voltage for right channel of power amplifier ROUT 7 SE right channel output PVDDR 8 Positive supply voltage for right channel of power amplifier BTL+ 9 Positive output of BTL PVDDL 10 Positive supply voltage for left channel of power amplifier LOUT/BTL- 11 SE left channel output or negative output of BTL AVSS 12 Negative supply voltage PVSSL 13 Negative supply voltage for left channel of power amplifier LIN 14 Left channel input SD_MODE 15 SD 16 AVSS 17 The shutdown mode selects the shutdown logic level of the SD pin. SD_MODE = 0, the device is shutdown when SD is logic low. SD_MODE = 1, the device is shutdown when SD is logic high. Negative supply voltage DVSS 18 Digital Ground /DAC_SD 19 DAC shutdown pin. /DAC_SD=0, DAC is shutdown. /DAC_SD=1, DAC is Active. DATA 20 Audio data input WS 21 Audio word select input BCK 22 Audio bit clock input FORMAT 23 Audio format. FORMAT=0, I2S format. DVDD 24 Digital Positive supply voltage FORMAT=1,Right justified format. AVDD 1 18 DVSS CAP_DC 2 17 AVSS HPIN 3 16 SD CAP 4 15 SD_MODE RIN 5 14 LIN PVSSR 6 13 PVSSL MS6337, QFN24 REV 2 3/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function ORDERING INFORMATION Package Part number Packaging Marking Transport Media 24-Pin SSOP (lead free) MS6337GTR MS6337G 2.5k Units Tape and Reel 24-Pin SSOP (lead free) MS6337GU MS6337G 56 Units Tube 24-Pin QFN (lead free) RoHS Compliance MS6337QTR 6337 5k Units Tape and Reel ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit 6.5 V -2000 to 2000 V VDD Positive Supply Voltage VESD Electrostatic Handling TSTG Storage Temperature Range -40 to 125 ℃ TA Operating Ambient Temperature Range -40 to 85 ℃ TJ Maximum Junction Temperature 120 ℃ TS Soldering Temperature, 10 seconds 260 ℃ RTHJA Thermal Resistance from Junction to Ambient in Free Air SSOP24 QFN24（enhance thermal pad） 90 65 ℃/W OPERATING RATINGS Symbol VDD REV 2 Parameter Supply Voltage 4/20 Min Typ. Max Unit 2.7 5 6.5 V www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function 5V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=5V, VSS=0V, f=1kHz ,RF=24KΩ[refer to Fig. 4], BW<30kHz; Unless otherwise specified) Symbol Parameter Conditions Min Typ. Max Unit 2.35 2.5 2.65 V VFS-10% 6 4.4 11 VFS 8 5.5 17 VFS+10% 12 6.6 25 V 3.8 - - - - 3.2 - - 16 DC Characteristics VCAP Voltage at CAP VFS Full scale output voltage IQ Quiescent current ISD Shutdown current VHP Headphone hysteresis point VFS=0.015775* RF *VDD Audio code 0000H, BTL Audio code 0000H, SE All devices shutdown SE Mode BTL Mode mA uA V AC Characteristics Res PSRR Resolution Power supply rejection ratio BTL Mode , RL=8Ω CAP=1uF, f=200Hz SE Mode , RL=32Ω CAP=1uF, f=200Hz SE Mode, RL=32Ω, VFS CS Channel separation THD+N Total harmonic distortion plus Noise SE mode, RL=32Ω, VFS S/N Signal-to-noise ratio SE mode, A-weighting, VFS Po REV 2 Output power bits 61 dB 66 dB 90 dB -64 -60 dB 0.062 0.1 % 86 90 BTL Mode, RL = 4Ω THD+N = 1% - 1.8 - W BTL Mode, RL = 8Ω THD+N = 1% - 1.2 - W SE Mode, RL =8Ω THD+N = 1% - 300m - W SE Mode, RL = 32Ω THD+N = 1% - 90m - W 5/20 dB www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function 3.3V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=3.3V, VSS=0V, f=1kHz, RF=24KΩ[refer to Fig, 4] ; Unless otherwise specified) Symbol Parameter Conditions Min Typ. Max Unit DC Characteristics VCAP Voltage at CAP 1.55 1.65 1.75 V VDC Output DC level 1.55 1.65 1.75 V VFS Full scale output voltage VFS=0.015775* RF *VDD VFS-10% VFS VFS+10% V IQ Quiescent current Audio code 0000H, BTL 5.4 6.6 9.9 mA ISD Shutdown current VHP Headphone hysteresis point Audio code 0000H, SE 3.8 4.8 5.8 mA All devices shutdown 7.3 11.2 16.5 uA SE Mode 2.3 - - - - 1.9 -63 -58 dB 0.07 0.126 % BTL Mode V AC Characteristics THD+N Po REV 2 Total harmonic distortion plus noise Output power SE mode, RL=32Ω, VFS BTL Mode, RL = 4Ω THD+N = 1% - 0.72 - W BTL Mode, RL = 8Ω THD+N = 1% - 0.52 - W SE Mode, RL =8Ω THD+N = 1% - 125m - W SE Mode, RL = 32Ω THD+N = 1% - 43m - W 6/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function 2.7V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=2.7V, VSS=0V, f=1kHz, RF=24KΩ[refer to Fig, 4]; Unless otherwise specified) Symbol Parameter Conditions Min Typ. Max Unit DC Characteristics VCAP Voltage at CAP 1.25 1.35 1.45 V VDC Output DC level 1.25 1.35 1.45 V VFS Full scale output voltage VFS=0. 015775* RF *VDD VFS-10% VFS VFS+10% V IQ Quiescent current Audio code 0000H, BTL 4.5 6 9 mA Audio code 0000H, SE 3.6 4.5 5.4 mA ISD Shutdown current All devices shutdown 5.5 9.2 13.5 uA VHP Headphone hysteresis point SE Mode 1.8 - - - - 1.5 -63 -58 dB 0.07 0.126 % BTL Mode V AC Characteristics THD+N Po REV 2 Total harmonic distortion plus noise Output power SE mode, RL=32Ω, VFS BTL Mode, RL = 4Ω, THD+N = 1% - 0.45 - W BTL Mode; RL = 8Ω THD+N = 1% - 0.33 - W SE Mode; RL = 8Ω THD+N = 1% - 85m - W SE Mode; RL = 32Ω THD+N = 1% - 25m - W 7/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function TYPICAL PERFORMANCE CHARACTERISTICS SE,8ohm ,VFS f=1kHz SE, 16ohm ,VFS f=1kHz SE, 32ohm ,VFS f=1kHz SUPPLY VOLTAGE (V) THD+N vs. supply voltage THD+N (%) SUPPLY VOLTAGE (V) THD+N vs. supply voltage THD+N (%) SUPPLY VOLTAGE (V) THD+N vs. supply voltage BTL,4ohm ,VFS f=1kHz RF = 22K BTL, 8ohm ,VFS f=1kHz SUPPLY VOLTAGE (V) THD+N vs. supply voltage THD+N (%) THD+N (%) THD+N (%) SUPPLY VOLTAGE (V) THD+N vs. supply voltage VDD=5V, VFS BTL, 8ohm REV 2 THD+N (%) THD+N (%) THD+N (%) (Ta=25℃, sampling rate=4fs, fs= 44.1kHz, RF = 24K; unless otherwise specified) VDD=3.3V, VFS BTL, 8ohm VDD=2.7V, VFS BTL, 8ohm FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency 8/20 www.mosanalog.com MOSA MS6337 VDD=5V, VFS BTL, 4ohm VDD=3.3V, VFS BTL, 4ohm VDD=2.7V, VFS BTL, 4ohm FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N (%) THD+N (%) THD+N (%) FREQUENCY (Hz) THD+N vs. frequency VDD=5V, VFS SE, 32ohm VDD=3.3V, VFS SE, 32ohm VDD=2.7V, VFS SE, 32ohm FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N (%) THD+N (%) THD+N (%) FREQUENCY (Hz) THD+N vs. frequency VDD=5V, VFS SE, 16ohm REV 2 THD+N (%) THD+N (%) THD+N (%) 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function VDD=3.3V, VFS SE, 16ohm VDD=2.7V, VFS SE, 16ohm FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency 9/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function CAP=10uF CAP=10uF CAP=10uF PSRR (dB) CAP=1uF PSRR (dB) VDD=3.3V BTL 8ohm VRR=-20dBV DAC Active VDD=5V BTL 8ohm VRR=-20dBV DAC Active CAP=1uF VDD=2.7V BTL 8ohm VRR=-20dBV DAC Active FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) PSRR（5V） vs. frequency PSRR（3.3V）vs. frequency PSRR（2.7V）vs. frequency CAP=1uF CAP=10uF PSRR (dB) PSRR (dB) CAP=10uF VDD=5V SE 32ohm VRR=-20dBV DAC Active CAP=10uF CAP=1uF PSRR (dB) PSRR (dB) CAP=1uF VDD=3.3V SE 32ohm VRR=-20dBV DAC Active CAP=1uF VDD=2.7V SE 32ohm VRR=-20dBV DAC Active FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) PSRR（5V） vs. frequency PSRR（3.3V）vs. frequency PSRR（2.7V）vs. frequency CAP=10uF CAP=10uF CAP=10uF VDD=5V BTL 8ohm VRR=-20dBV DAC SD REV 2 PSRR (dB) CAP=1uF PSRR (dB) PSRR (dB) CAP=1uF VDD=3.3V BTL 8ohm VRR=-20dBV DAC SD CAP=1uF VDD=2.7V BTL 8ohm VRR=-20dBV DAC SD FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) PSRR（5V） vs. frequency PSRR（3.3V）vs. frequency PSRR（2.7V）vs. frequency 10/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function CAP=1uF VDD=5V SE 32ohm VRR=-20dBV DAC SD CAP=10uF PSRR (dB) CAP=10uF PSRR (dB) PSRR (dB) CAP=10uF CAP=1uF VDD=3.3V SE 32ohm VRR=-20dBV DAC SD CAP=1uF VDD=2.7V SE 32ohm VRR=-20dBV DAC SD FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) PSRR（5V） vs. frequency PSRR（3.3V）vs. frequency PSRR（2.7V）vs. frequency SE QUIESCENT CURRENT (mA) QUIESCENT CURRENT (mA) BTL SE, 32ohm BTL, 8ohm BTL SE All Devices activate. All Devices activate. QUIESCENT CURRENT (mA) SE, 32ohm BTL, 8ohm No Loading BTL SE DAC Shutdown REV 2 VDD=5V QUIESCENT CURRENT (mA) SUPPLY VOLTAGE (V) Quiescent current vs. supply voltage QUIESCENT CURRENT (mA) SUPPLY VOLTAGE (V) Quiescent current vs. supply voltage QUIESCENT CURRENT (mA) SUPPLY VOLTAGE (V) Quiescent current vs. supply voltage VDD=3.3V VDD=2.7V SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Mode vs. HP-IN votage Mode vs. HP-IN votage Mode vs. HP-IN votage 11/20 www.mosanalog.com CHANNEL SEPARATION (dB) MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function VFS ,f=1kHz SE, 32ohm SUPPLY VOLTAGE (V) Channel separation vs. supply voltage REV 2 12/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function TIMING AND DATA FORMAT The MS6337 accepts input serial data formats of 16-bit word length. Left and right data words are time multiplexed can also be input format, single channel. The MSB must always be first. LEFT WS RIGHT tr tHB tf tLB tHW tSW BCK tcr tSD LSB DATA tHD MSB Fig.1 Timing and input signals.（Stereo） Fig.2 Timing and input signals.（Mono） Data format (BCK, WS and DATA) Symbol Parameter Conditions Min Typ. Max Unit - 0.7 V VIL Input LOW level - VIH Input HIGH level 1.6 - - V l I IL l l I IH l f BCK Input Leakage Current LOW - - 10 Input Leakage Current HIGH - - 10 A A Input Clock Frequency - - 18.4 MHz BR Bit Rate Data Input - - 18.4 Mbits/s fWS Word Select Input - - 384 kHz tr tf t Cr t HB t LB t SD t HD t HW t SW Rise Time - - 12 ns Fall Time - - 12 ns Bit Clock Cycle Time 54 - - ns Bit Clock High Time 15 - - ns Bit Clock Low Time 15 - - ns Data Set-up Time 12 - - ns REV 2 Data Hold Time to Bit Clock 2 - - ns Word Select Hold Time 2 - - ns Word Select Set-up Time 12 - - ns 13/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function Right justified format LEFT WS RIGHT BCK DATA 2 1 0 15 14 13 2 MSB 1 0 15 LSB MSB 14 13 2 1 0 LSB Fig.3 Right justified format（Stereo） Fig.4 Right justified format（Mono） I2S format WS LEFT RIGHT BCK 1 BCK DATA 15 MSB 14 1 BCK 13 2 1 0 15 LSB MSB 14 13 2 1 0 LSB Fig.3 I2S format（Stereo） Fig.3 I2S format（Mono） REV 2 14/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function APPLICATION INFORMATION Basic application example CF 1u DVDD VDD 0.1u RF DVDD LIN DGND Supply WS 100k HP_sense 1u BCK Decoder 100k MS6337 VDD 400K A1 + DAC LOUT/BTL- 400K DATA FORMAT 100u RL 8Ω 1k BTL+ A2 + Headphone Jack 100u VDD DAC SD DAC SD 400K MCU B1 + SD MODE SD 390K 400K Click/Pop Reduction Bias CAPDC AVDD CAP 390K Power Amplifier Supply 1u HPIN ROUT 1k Supply Mono / Stereo Mode Switching Circuitry RIN PVDDL PVDDR PVSSL PVSSR AVDD AVSS AVDD CF Note: RF 0.1u 0.1u 0.1u 1u VDAC out=0.015775*RF*VDD（Vpp） RF//CF to decide –3dB point For VDD=3V, RL=32, RF =24k, CF =390pF, VDAC out =1.134Vpp _RL=16, RF =22k, CF =470pF, VDAC out =1.04Vpp Fig.4 Basic application circuit. SE mode and BTL mode operation As shown in the block diagram (Page.1), for the SE mode, the MS6337 operates as a high drive dual operational amplifiers. Amplifier A1 and B1 are independent amplifiers with an externally configured gain of AV = - RF/RIN. Amplifier A2 is shutdown to a high output impedance state. That is, the mono speaker is muted. For the BTL mode, the audio signal from the RIN pin is connected directly to the inverting input of A1. As a result, the L-IN and R-IN audio signals, either from DAC or Line in, are summed together at the input of A1. A2 is then activated with a closed-loop gain of AV = -1 fixed by two internal resistors. The outputs of A1 and A2 are then used to drive the mono bridged-tied load. Also in the BTL mode, the amplifier B1 functions as an unit gain buffer. The output voltage of B1 will follow Vcap, in which no current goes through the feedback resistor RF of B1. This will insure that as HPIN goes low there is no transient of Rout for the BTL mode. REV 2 15/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function EXTERNAL DIMENSIONS SSOP24 Symbol Dimension in mm Min A A1 A2 B C D E E1 e L θ y REV 2 Nom Dimension in inches Max Min 1.35 1.6 1.75 0.1 0.25 1.45 0.2 0.25 0.30 0.19 0.25 8.55 8.75 5.8 6.0 6.2 3.8 3.9 4.0 0.640 BASIC 0.40 1.27 0o 8o 0.10 Nom Max 0.053 0.064 0.069 0.004 0.010 0.057 0.008 0.010 0.012 0.007 0.010 0.337 0.344 0.228 0.236 0.244 0.150 0.153 0.157 0.025 BASIC 0.016 0.05 0o 8o 0.004 16/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function QFN24 (4x4mm) Symbol A A1 A3 b D D1 E E1 e L REV 2 Dimension in mm Min Nom Max 0.70 0.75 0.80 0 0.02 0.05 0.203REF 0.18 0.25 0.30 3.90 4.00 4.10 1.90 2.00 2.10 3.90 4.00 4.10 1.90 2.00 2.10 0.50BSC 0.30 0.40 0.50 Dimension in inch Min Nom Max 0.02756 0.02953 0.03150 0 0.00079 0.00197 0.008REF 0.00709 0.00984 0.01181 0.1535 0.1575 0.161.4 0.0748 0.0787 0.0827 0.1535 0.1575 0.1614 0.0748 0.0787 0.0827 0.01969BSC 0.0118 0.0157 0.0197 17/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function Demo board 2 1 3 6 4 5 Function description Label 1: Supply Input Supply voltage range is 2.7V to 6.5V. Label 2: Headphone Jack Used 3.5mm diameter of headphone with 32ohm Label 3: Speaker Output Connected to speaker with 8ohm or 4 ohm Label 4: Digital Signal Input Connected to digital audio formats as I2S, Right Justified. Label 5: LED Indicator The LEDs indicate the chip status and IR received status. It is red-dark blink once when the MCU has received the function code correctly. Label 6: Reset All I/O pins are reset to default values.（Initial state: RJF, CAP_UP, DAC_SD, /SD_MODE, SD = 0.） REV 2 18/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function IR Controller Initial state: RJF, CAP_UP, DAC_SD, /SD_MODE, SD = 0. I2S, RJF: The digital input format keys. There are two formats can be selected that is I2S and Right justified. CAP_UP/CAP DOWN : The CAP control key. ( This pin is functional only as the system is shutdown.) CAP_UP : CAP charge. CAP_DOWN : CAP discharge. DAC_ACT, DAC_SD : The DAC Shutdown keys. DAC_ACT : DAC is active. DAC_SD : DAC is shutdown. SD_MODE, /SD_MODE: The shutdown mode select keys. The shutdown mode selects the shutdown logic level SD=0, SD=1: The shutdown level control keys. SD_MODE , the device is shutdown when SD = 0. /SD_MODE , the device is shutdown when SD =1. REV 2 19/20 www.mosanalog.com MOSA MS6337 16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier Plus Stereo Headphone Function Circuit DVDD R1 DVDD C3 0.1u S1 C4 1u POWER RST R4 10K C6 20P C7 1 2 + W1 JUMP + C2 10u Y1 24M 20P U1 + 1 2 3 4 5 IR_IN 6 7 8 9 10 RST P3.0 P3.1 XTAL2 XTAL1 P3.2 P3.3 P3.4 P3.5 GND DGND 1 47u 2 IR_IN 20 D1 19 18 SD_MODE 17 SD 16 DAC_PD 15 CAP_DC 14 FORMAT 13 12 11 Q1 VS GND 3 IR IR + C5 470P HP_IN C9 AT89C4051 C10 + J2 R HP L G HP OUT J4 R8 1K SP1 C12 1u 100K 100u R7 1K R_OUT L_OUT 1 2 3 OUT AGND SPK U2 R9 24K C13 1u + 1 2 3 4 5 SD_MODE 6 SD 7 8 9 DAC_PD 10 11 12 C15 + J5 390P R12 R13 R14 1 2 3 4 1K 1K 1K PVDDL BTL+ LOUT/BTL- PVDDR AVSS ROUT PVSSL PVSSR LIN RIN SD_MODE CAP SD HP_IN AVSS /CAP_DC DGND AVDD /DAC_PD DVDD DATA FORMAT WS BCK 24 23 22 21 20 19 18 17 16 15 14 13 R10 24K C14 1u C16 HP_IN CAP_DC C17 390P 1u R11 390K C18 + C11 0.1u 100K R6 100u AVCC + R5 + C8 1u DGND + AVCC C1 + DVDD FORMAT C19 + 1 2 R2 10K + J3 Vcc P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 P3.7 R3 1K 220 + + + + 1 2 + J1 1u 1u AGND MS6337 W2 DAC_IN Jumper AGND AGND REV 2 20/20 DGND www.mosanalog.com