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TDA8552T Datasheet(PDF) 10 Page - NXP Semiconductors |
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TDA8552T Datasheet(HTML) 10 Page - NXP Semiconductors |
10 / 28 page 1998 Jun 02 10 Philips Semiconductors Preliminary specification 2 × 1.4 W BTL audio amplifiers with digital volume control and headphone sensing TDA8552T; TDA8552TS Notes 1. With a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal to 2. The DC output voltage with respect to ground is approximately 0.5VDD. 3. Output voltage in mute position is measured with an input of 1 V (RMS) in a bandwidth of 20 kHz, so including noise, gain select pin is LOW (0 V). Volume control tW pulse width 50 −− ns trep pulse repetition time 100 −− ns Vth(up) UP/DOWN pin UP threshold level 4.1 − VDD V Vfloat(max) UP/DOWN pin floating high level −− 3.4 V Vfloat(min) UP/DOWN pin floating low level 1.0 −− V Vth(down) UP/DOWN pin DOWN threshold level 0 − 0.6 V II(up/down) input current UP/DOWN pin 0 < VUP/DOWN <VDD −− 200 µA twait auto repeat wait time − 500 − ms trep repeat time key pressed − 130 − ms Volume attenuator Gv(l) low gain; maximum volume (including power amplifier) 19 20 21 dB low gain; minimum volume (including power amplifier) tbf −60 tbf dB Gv(h) high gain; maximum volume (including power amplifier) 29 30 31 dB high gain; minimum volume (including power amplifier) tbf −50 tbf dB Nstep number of gain steps − 64 − ∆G v variation of gain per step − 1.25 − dB Zi input impedance 14 20 − k Ω Vi(max)(rms) maximum input voltage (RMS value) −− 1.75 V SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT 2 DC output offset voltage R L ---------------------------------------------------------------- × |
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