TEA1098A

INTEGRATED CIRCUITS DATA SHEET TEA1098A Speech and handsfree IC Preliminary specification File under Integrated Circuits, IC03 2000 Mar 21 Philips Semiconductors Preliminary specification Speech and handsfree IC FEATURES Line interface Low DC line voltage Voltage regulator with adjustable DC voltage Symmetrical high impedance inputs (70 kΩ) for dynamic, magnetic or electret microphones DTMF input with confidence tone on earphone and/or loudspeaker Earphone amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain) Digital volume control on earphone amplifier (4 steps) Automatic Gain Control (AGC) for true line loss compensation Microphone mute Key tone mode. Supplies Provides a strong 3.35 V regulated supply for microcontroller or dialler Provides filtered power supply, optimized according to line current Filtered 2.0 V power supply output for electret microphone PD logic input for power-down. Handsfree Asymmetrical high input impedance for electret microphone Loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain Dynamic limiter on loudspeaker amplifier to prevent distortion Digital volume control on loudspeaker amplifier (8 steps) ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TEA1098ATV TEA1098AH VSO40 QFP44 DESCRIPTION plastic very small outline package; 40 leads plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 × 10× 1.75 mm GENERAL DESCRIPTION Dupl...