TEA1085A Description
The TEA1085 and TEA1085A are bipolar ICs which have been designed for use in line-powered telephone sets and provide a listening-in facility for the received line signal via a loudspeaker. Nearly all the line current can be used for powering the loudspeaker. The circuits incorporate a supply circuit, loudspeaker amplifier dynamic limiter, MUTE circuit, power-down facility and logic inputs for gain setting.
TEA1085A Key Features
- Internal supply optimum current split-up
- low constant current (adjustable) in transmission IC
- nearly all line current available for listening-in adjustable supply voltage
- Loudspeaker amplifier dynamic limiter providing low distortion and the highest possible output power SE or BTL drive for
- Larsen level limiter low sensitivity for own speech due to 3rd-order filter and attack delay adjustable voltage threshol
- Power down input
- MUTE input TEA1085/TEA1085A
- clickfree switching between listening-in mode and standby mode TEA1085
- toggle function
- start-up in standby condition TEA1085A