Multimedia ICs 16-bit stereo D / A converter for audio applications BU9480F The BU9480F is a 16-bit stereo D / A converter designed for audio applications, and has an internal 2 oversam- pling circuit. Applications 16-bit stereo D / A converter for audio applications Features 1) 3.0 to 5.5V operating voltage. 4) 2-channel common phase output. 2) Low current consumption because of the CMOS 5) Internal 2 oversampling interpolator. process. 6) 8 - pin plastic package. 3) Resistor strings method used. 7) Supports 4fs. (200kHz operation) Block diagram LRCLK 5 SHIFT REGISTER / LATCH 8 VCC BCLK 7 X2 OVER X2 OVER SAMPLING SAMPLING 6 SDATA DAC DAC 3 GND 2 4 1 REF OUTL OUTR Pin descriptions Pin No. Pin name Function I / O Voltage Low-impedance output 1ROUT Right channel analog signal output 1 / 2VCC 2 REF Connects the DA ref. voltage pin and ground High-impedance input 1 / 2VCC 3 GND Ground 4LOUT Left channel analog signal output Low-impedance output 1 / 2VCC The signal that distinguishes between left and 5 LRCK right channels for serial data (left channe = Logic input high level, right channel = low level). Serial data input 6 SDAT Logic input Input with 2 compliment, MSB first. 7 BCLK Serial data shift clock input Logic input 8 VCC Vcc 1Multimedia ICs BU9480F Absolute maximum ratings (Ta = 25C) Parameter Symbol Limits Unit Applied voltage VDDMax. 7.0 V * Power dissipation Pd 450 mW Operating temperature Topr 10 ~ + 70 C Storage temperature Tstg 55 ~ + 125 C Input voltage Topt 0.3 ~ VDD + 0.3 V When unmounted, reduced by 4.5mW for each increase in Ta of 1C over 25C. * Recommended operating conditions Parameter Symbol Limits Unit Power supply voltage VDD 3.0 ~ 5.5 V 0.0 ~ 0.2 VDD Input low level voltage VIL V Input high level voltage VIH 0.8 VDD ~ VDD V Electrical characteristics (unless otherwise noted, Ta = 25C, VDD = + 5.0V) Analog unit characteristics Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Current dissipation IDD 3.6 6 mA f = 1kHz, 0dB Fig.6,7 Resolution RES 16 BIT Fig.6,7 Noise distortion 1 THD1 0.05 0.12 % f = 1kHz, 0dB Fig.6,7 Noise distortion 2 THD2 0.07 0.4 % f = 1kHz, 20dB Fig.6,7 Full-scale output voltage VFS 1.8 2 2.2 VP-P Fig.6,7 Unmeasured channel output = C.T 92 85 dB Fig.6,7 Crosstalk 0 dB, f = 1kHz. DIN audio filter S / N ratio S / N 86 93 dB DIN audio filter Fig.6,7 Output pin load resistance 10 kW Fig.6,7 RL Logic input characteristics Parameter Symbol Min. Typ. Max. Unit Conditions Measurement circuit Input high level voltage VIH 0.7 VDD VDD V Pins 5,6 and 7 Fig.6,7 Input low level voltage VIL GND 0.3 VDD V Pins 5,6 and 7 Fig.6,7 Leakage current, high level IIH 10 m A Pins 5,6 and 7 = VDD Fig.6,7 Leakage current, low level IIL 10 m A Pins 5,6 and 7 = GND Fig.6,7 DA conversion frequency fSL 200 kHZ Fig.6,7 BCLK period TBCLK 60 ns Fig.6,7 SDAT.LRCK settling time TST 60 ns Fig.6,7 SDAT.LRCK holding time THD 60 ns Fig.6,7 2