Datenblatt-Suchmaschine für elektronische Bauteile |
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TPA2000D1PW Datenblatt(PDF) 8 Page - Texas Instruments |
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TPA2000D1PW Datenblatt(HTML) 8 Page - Texas Instruments |
8 / 14 page TPA2000D1 2-W FILTERLESS MONO CLASS-D AUDIO POWER AMPLIFIER SLOS328B – JUNE 2000 – REVISED MAY 2001 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION Table 1. Gain Settings GAIN0 GAIN1 AMPLIFIER GAIN (dB) INPUT IMPEDANCE (k Ω) TYP TYP 0 0 6 104 0 1 12 74 1 0 18 44 1 1 23.5 24 input resistance Each gain setting is achieved by varying the input resistance of the amplifier, which can range from its smallest value to over six times that value. As a result, if a single capacitor is used in the input high-pass filter, the –3dB or cutoff frequency will also change by over six times. Ci IN Zi Zf Input Signal The –3-dB frequency can be calculated using equation 4. (4) f –3dB + 1 2 p C i R ø Z i input capacitor, Ci In the typical application an input capacitor (Ci) is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation. In this case, Ci and the input impedance of the amplifier (Zi) form a high-pass filter with the corner frequency determined in equation 5. fc + 1 2 pZ i C i –3 dB fc (5) |
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