Product Summary

The TEA1081 is an integrated circuit for use in line-powered telephone sets to supply peripheral circuits for extended dialling and/or loudspeaker facilities. The TEA1081 IC uses a part of the surplus line current normally drawn by the voltage regulator of the speech/transmission circuit. A power-down function of the TEA1081 isolates the IC from its load and reduces the input current.

Parametrics

TEA1081 absolute maximum rating system: (1)VLN positive line voltage continuous: 12 V; (2)during switch-on or line interruptions: 12.5 V; (3)VLN(RM) repetitive peak line voltage for a 1 ms pulse per 5 s 12 W resistor in series with pin: 28 V; (4)VI input voltage (all other terminals) VVN: - 0.5 to VLN + 0.5V; (5)II input current (all other terminals): -1 to +1 mA; (6)Tamb operating ambient temperature: -25 to +70 ℃; (7)Tstg storage temperature: -40 to +125 ℃; (8)Tj junction temperature: +125 ℃.

Features

TEA1081 features: (1)High input impedance for audio signals; (2)Low DC series resistance; (3)High output current; (4)Large audio signal handling capability; (5)Low distortion; (6)Two modes of operation: output voltage that follows the DC line voltage; regulated output voltage; (7)Power-down input; (8)Low number of external components.

Diagrams

TEA1081 Block diagram

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