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| Audio ICs Low power consumption headphone driver for digital audio BA3576FS The BA3576FS is a headphone driver developed for use in 3.0V portable digital audio equipment. FApplications Portable CD and MD players. FFeatures 1) Low power consumption (when Po = 0.5mW per channel, the power supply current is 4.7mA, and the )B current is 6.8mA (Typ.)). 2) High S / N ratio (96dB). 3) AVC circuit. 4) Beep output function 5) Mute circuit. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 884 Audio ICs FBlock diagram BA3576FS 885 Audio ICs BA3576FS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3.0V, )B = 2.4V, f = 1kHz, RL = 16, DIN AUDIO PWSTB = 3.0V, MUTE = 0V, ATT = OFF and AVC = OFF) 886 Audio ICs FMeasurement circuit BA3576FS 887 Audio ICs Measurement conditions BA3576FS 888 Audio ICs FApplication example BA3576FS 889 Audio ICs BA3576FS FOperation notes (1) By operating the BA3576FS according to the timing chart shown in Fig.3, it is possible to suppress generation of "pop" noise in the headphone output. (2) The BA3576FS ripple filter pins (1 and 2) and the bias amp pins (3 and 4) cannot be used as external power supplies or reference voltages. (3) The BEEP signal is only output when PWSTB (pin 7) and MUTE (pin 9) are high level. Also, input a rectangular wave of between 500Hz and 5kHz and with an amplitude of VCC (with respect to ground) to BEEP IN (pin 11). FElectrical characteristics curves 890 Audio ICs FExternal dimensions (Units: mm) BA3576FS 891 |
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