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TEA1099 Datasheet(PDF) 6 Page - NXP Semiconductors |
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TEA1099 Datasheet(HTML) 6 Page - NXP Semiconductors |
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6 / 40 page  1999 Apr 08 6 Philips Semiconductors Product specification Speech and handsfree IC with auxiliary inputs/outputs and analog multiplexer TEA1099H Fig.2 Pin configuration. handbook, full pagewidth 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24 23 TEA1099H MGM297 QR DTMF MIC + MIC − TXIN GATX TXOUT IDT SWT VOL HFRX TNOI TENV TSEN RNOI RSEN DLC ESI GALS GNDTX RENV VBB FUNCTIONAL DESCRIPTION All data given in this chapter are typical values, except when otherwise specified. Supplies LINE INTERFACE AND INTERNAL SUPPLY (PINS LN, SLPE, REG AND VBB) The supply for the TEA1099H and its peripherals is obtained from the line. The IC generates a stabilized reference voltage (Vref) between pins SLPE and GND. This reference voltage is equal to 3.7 V for line currents lower than 18 mA. It than increases linearly with the line current and reaches the value of 6.1 V for line currents higher than 45 mA. For line currents below 9 mA, the internal reference voltage generating Vref is automatically adjusted to a lower value. This is the so-called low voltage area and the TEA1099H has limited performances in this area (see Section “Low voltage behaviour”). This reference voltage is temperature compensated. The voltage between pins SLPE and REG is used by the internal regulator to generate the stabilized reference voltage and is decoupled by means of a capacitor between pins LN and REG. This capacitor converted into an equivalent inductance realizes the set impedance conversion from its DC value (RSLPE) to its AC value (done by an external impedance). The IC regulates the line voltage at pin LN and it can be calculated as follows: where: Iline = line current Ix = current consumed on pin LN (approximately a few µA) ISLPE = current flowing through the RSLPE resistor V LN V ref R SLPE I × + SLPE = I SLPE I line I x – = |
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Descripción similar - TEA1099 |
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