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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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TEA0678 Fiches technique(PDF) 6 Page - NXP Semiconductors |
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TEA0678 Fiches technique(HTML) 6 Page - NXP Semiconductors |
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6 / 28 page  1996 Jun 06 6 Philips Semiconductors Preliminary specification Dual Dolby* B-type noise reduction circuit, automatic music search, with differential outputs and mute TEA0678 CHARACTERISTICS VCC = 10 V; f = 20 Hz to 20 kHz; Tamb =25 °C; nominal load 10 kΩ; all levels are referenced to 775 mV (RMS) (0 dB) at differential outputs (Vo =Vo+ − Vo−), this corresponds to Dolby level 387.5 mV (RMS) (0 dB) at test point (OUTC); see Fig.1; NR on/AMS off; EQ switch in the 70 µs position; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VCC supply voltage 7.6 10 12 V ICC supply current pins 14, 16, 17 and 19 connected to Vref − 25 28 mA f = 1 kHz; Vo = 0 dB at each output − 26 37 mA αm channel matching f = 1 kHz; Vo = 0 dB; NR off; OUTA/OUTB −0.5 − +0.5 dB Gv voltage gain (output stage) between OUT and OUTC; f = 1 kHz; NR off 5.5 6 6.5 dB Gmm voltage gain mismatch (output stage) mismatch between OUT+ and OUT −; f = 1 kHz; NR off −0.5 − +0.5 dB THD total harmonic distortion (2nd and 3rd harmonic) f = 1 kHz; Vo =0dB − 0.08 0.15 % f = 10 kHz; Vo =6dB − 0.15 0.3 % HR headroom at output VCC = 9 V; THD = 1%; f = 1 kHz 13 −− dB signal plus noise-to-noise ratio internal gain 40 dB; linear; CCIR/ARM weighted; decode mode; see Fig.10 78 84 − dB Vno(rms) equivalent input noise voltage in decode mode (RMS value) NR off; unweighted; f = 20 Hz to 20 kHz; Rsource =0 Ω −− 1.4 µV PSRR power supply ripple rejection Vi(rms) = 0.25 V; f = 1 kHz; see Fig.7 for unsymmetrical signal at OUTC 52 57 − dB at differential OUT; note 1 49 52 − dB fo frequency response measured in encode mode; referenced to TP see Fig.10 Vo = −25 dB; f = 0.2 kHz −22.9 −24.4 −25.9 dB Vo = 0 dB; f=1kHz −1.5 0 +1.5 dB Vo = −25 dB; f=1kHz −17.8 −19.3 −20.8 dB Vo = −25 dB; f=5kHz −18.1 −19.6 −21.1 dB Vo = −35 dB; f = 10 kHz −24.4 −25.9 −27.4 dB αcs channel separation Vo = +10 dB; f = 1 kHz; see Fig.8 61 67 − dB αcc crosstalk between active and inactive input NR off; f = 1 kHz; Vo = +10 dB; see Fig.8 70 77 − dB RL load resistance at each output OUTA+, OUTA −, OUTB+ and OUTB − (corresponds to 2 kΩ at differential output) AC-coupled f = 1 kHz; Vo = 12 dB; THD=1% 10 −− k Ω THD = 1%; note 2 1 −− k Ω CL capacitive load at each output (between OUT+ and OUT −) and ground CLmin at each output to ground (pins 1, 2, 31 and 32) 0.3 − 1.3 nF Gv voltage gain of pre-amplifier from pin INA1 or INA2 to pin EQFA and from pin INB1 or INB2 to pin EQFB; f = 1 kHz 29 30 31 dB SN + N -------------- |
Numéro de pièce similaire - TEA0678 |
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Description similaire - TEA0678 |
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