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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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TEA1096AT Fiches technique(PDF) 8 Page - NXP Semiconductors |
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TEA1096AT Fiches technique(HTML) 8 Page - NXP Semiconductors |
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8 / 32 page  November 1994 8 Philips Semiconductors Product Specification Speech and listening-in IC TEA1096; TEA1096A FUNCTIONAL DESCRIPTION Remark: all data given in this chapter are typical values except when otherwise specified. Supply pins SLPE, LN, VEE, VBB, VDD, REG and PD The supply for the TEA1096/TEA1096A and its peripherals is obtained from the telephone line. The circuits regulate the line voltage and generate their own supply voltages VDD and VBB to power the transmission part and the loudspeaker amplifier respectively. As can be seen from Fig.5, the line current (Iline) is split between the sending output stage (Iln), the circuitry connected to SLPE (Isl), the transmission circuit (IDD), the peripheral circuits (Ip) and the current switch (ISUP). It can be shown that: ISUP =Iline − (Iln +Isl +IDD +IP) With nominal conditions where: Iln = 5 mA, Isl = 0.3 mA and IDD = 2.4 mA it therefore follows that ISUP ≈ Iline − 7.7 mA − IP. The remaining current ISUP is available for the listening-in part. The current consumption IBB0 of the listening-in circuitry is 2.5 mA. To power the loudspeaker, the line current has to be more than 10 mA. The voltage at SLPE is stabilized at 4.45 V nominal. The DC line voltage is regulated at: VLN =VSLPE +RSLPE × (Iline − Iln). The supply voltage for the transmission part and peripheral circuits (VDD) is generated from VSLPE and is equal to VDD =VSLPE − RDD × (IDD +Ip). VBB supplies the listening-in circuitry and is stabilized at 3.6 V nominal. A resistor connected between pin REG and VEE can be used to decrease the SLPE voltage while maintaining VBB at its nominal value, whereas a resistor connected between pin REG and pin SLPE will increase the SLPE voltage while maintaining VBB at its nominal value. When adjusting the SLPE voltage to a lower value, care should be taken that the VSLPE is at least 0.4 V higher than VBB (VBB supply efficiency). Fig.5 Supply arrangement. |
Numéro de pièce similaire - TEA1096AT |
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Description similaire - TEA1096AT |
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