MS6308 MOSA ELECTRONICS Class AB stereo headphone driver FEATURES APPLICATIONS • • • • • • • • • • • Wide temperature range No switch-ON/OFF clicks Excellent power supply ripple rejection Low power consumption Short-circuit resistant High performance : - high SNR - high slew rate - low distortion • Large output voltage swing CD-RW、DVD-RW CD-ROM、DVD-ROM Motherboard MP3、PDA Portable Digital Audio DESCRIPTION The MS6308 is an integrated class AB stereo headphone driver contained in an SO8 package. The device is fabricated in a CMOS process and has been primarily developed for portable digital audio applications. MS6308 is pin and function compatible with the Philips, TDA1308T. PINNING Symbol Pin Description OUTA 1 output A -INA 2 inverting input A +INA 3 non-inverting input A 8 VDD OUTA 1 VSS 4 negative supply +INB 5 non-inverting input B -INB 6 inverting input B OUTB 7 output B VDD 8 positive supply -INA 2 +INA 3 MS6308 VSS 4 7 OUTB 6 -INB 5 +INB Pin configuration BLOCK DIAGRAM OutA 1 -INA 2 - +INA 3 + VSS 4 8 VDD Fig.1 7 OutB - 6 -INB + 5 +INB Block Diagram -1- www.mosanalog.com.tw MS6308 MOSA ELECTRONICS Class AB stereo headphone driver ELECTRICAL CHARACTERISTICS VDD = 5V; VSS = 0V; f = 1 kHz; RL = 32Ω ; Measured in test circuit of Fig.2 Symbol VDDs VDDd VSS I DD Ptot Parameter single supply voltage dual supply voltage negative supply voltage supply current total power dissipation VESD Electrostatic Discharge Conditions RL not connected RL not connected MIL-STD-883D Method 3015.7 Min 2.8 1.4 -1.4 - Typ 5.0 2.5 -2.5 3 15 Max 7.0 3.5 -3.5 5 25 Unit V V V mA mW 6000 - - V Min 0 0.75 1.5 0.1 - Typ 10 10 80 60 0.25 90 Max 3.5 4.25 3.5 4.9 - Unit mV pA V dB mA - 70 105 - 200 dB dB pF Typ -70 0.03 -101 0.0009 110 5.5 60 3 5 20 Max -65 0.06 - Unit dB DC CHARACTERISTICS Symbol V Ios I bias VCM GV IO RO VO Parameter input offset voltage input bias current common mode voltage open-loop voltage gain maximum output current output resistance output voltage swing PSRR power supply rejection ratio CS channel separation CL load capacitance Conditions RL = 5 kΩ (THD+N)/S < 0.1% note 1 RL = 16 Ω; note 1 RL = 5 kΩ; note 1 f = 100 Hz; Vripple=100mV(p-p) RL = 5 kΩ Ω V V V dB AC CHARACTERISTICS Symbol (THD+N)/S S/N fG Po Ci SR B Parameter total harmonic distortion plus noise signal-to-noise ratio unity gain frequency maximum output power input capacitance slew rate power bandwidth Conditions note 2 note 2; RL = 5 kΩ open-loop;RL=5 kΩ (THD+N)/S < 0.1% unity gain inverting unity gain inverting Min 100 - % dB % dB MHz mW pF V/µs kHz Notes 1. 2. Values are proportional to VDD (THD+N) / S VDD = 5.0 V; VO = 3.5 V(p-p) (0 dB). < 0.1 %. -2- www.mosanalog.com.tw MS6308 MOSA ELECTRONICS Class AB stereo headphone driver APPLICATION INFORMATION VDD 100uF 3.9k 10uF VOA RL 3.9k 2 ViA 8 1 3 VREF 100uF MS6308 (typ. 2.5V) 5 10uF 7 3.9k ViB 6 4 100uF 3.9k VOB RL F ig.2 Measurement circuit, inverting application Basic application example A typical example of a CD-application with the MS6311 is shown in Fig.3. It features typical decoupling components and a second-order analog post-filter (smoothing filter) stage providing a line output. 420pF 1 2 3 4 BCK VoR 8 WS n.c. 7 DATA VoL 6 VDD 5 GND 50k Headphone (32Ω) 50k MS6308 100nF 420pF MS6311 50k Headphone (32Ω) 50k 10Ω MS6308 VDD 100nF 47uF Fig.3 Note : 100nF Example of a 2nd order filter application. No external capacitor loading is allowed at the output pins 6 and 8. -3- www.mosanalog.com.tw MS6308 MOSA ELECTRONICS Class AB stereo headphone driver MP3 digital to analog converting solution. Fig.4 MP3 DECODER DAC Headphone Driver 470pF 20k 1 BCK VoR 8 2 WS CAP 7 3 DATA VoL 6 4 GND VDD 5 SUNPLUS SPCA751 STMicroelectronics STA013 1.2VP-P 0.1uF 10Ω 2 1 50k 10uF 50k VREF 3V 1.6VP-P MS6308 10uF 0.1uF 47uF 3 PHONE JACK 5 MS6313 3.3V 15k 15k 7 47uF Headphone (32Ω) 6 22k AVDD 47uF 100k 450pF 0.1uF 2.2k Power On/Off 50k Fig.4 A first order lowpass filter for DAC output. EXTERNAL DIMENSIONS (Unit : mm Tolerance : 0.1mm) 4.8 8 5 1 4 6.0 3.9 1.27 0.42 0.68 1.4 0.22 1.27 0.42 -4- 0.23 www.mosanalog.com.tw MS6308 MOSA ELECTRONICS Class AB stereo headphone driver TAPE AND REEL (Unit : mm) 2.0 0.30 0.05 0.05 1.5+0.1/-0.0 DIA 4.0 1.75 0.3R MAX 5.5 0.05 12.0 0.3 5.4 3.0 3.6 8.0 1.5 MIN 6.9 0.5 Radius Typical 2.0 1.7 ORDERING INFORMATION Part Packaging Marking Package Number Marking Printing Transport Media Tape and Reel MS6308 MS6308 SO8 DESCRIPTION MS 6308 Ink Product Number MOSA Abbreviation Tube SOP 8 : Plastic small outline package ; 8 leads. -5- www.mosanalog.com.tw