TEA1097H

INTEGRATED CIRCUITS DATA SHEET TEA1097 Speech and loudspeaker amplifier IC with auxiliary inputs/outputs and analog multiplexer Product specification Supersedes data of 1998 Jun 11 File under Integrated Circuits, IC03 1999 Apr 08 Philips Semiconductors Product specification Speech and loudspeaker amplifier IC with auxiliary inputs/outputs and analog multiplexer FEATURES Line interface Low DC line voltage Voltage regulator with adjustable DC voltage Symmetrical high-impedance inputs (70 kΩ) for dynamic, magnetic or electric microphones Dual Tone Multi-Frequency (DTMF) input with confidence tone on earphone and/or loudspeaker Receive amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain) Automatic Gain Control (AGC) for true line loss compensation. Supplies Provides a strong 3.35 V regulated supply for microcontroller or dialler Provides filtered power supply, optimized according to line current and compatible with external voltage or current sources Filtered 2 V power supply output for electret microphone Compatible with a ringer mode Power-Down (PD) logic input for power-down. Loudspeaker amplifier Single-ended rail-to-rail output Externally adjustable gain Dynamic limiter to prevent distortion Logarithmic volume control via linear potentiometer. Auxiliary interfaces Asymmetrical high-impedance input for electret microphone. ORDERING INFORMATION TYPE NUMBER TEA1097TV TEA1097H PACKAGE NAME VSO40 QFP44 DESC...