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TEA1098

Speech and handsfree IC

PHI

TEA1098

Speech and handsfree IC;

恩XP

TEA1098

Telecommunication Circuit & Radio Circuit;

TEA1098A

Speech and handsfree IC; Line interface\n? Low DC line voltage\n? Voltage regulator with adjustable DC voltage\n? Symmetrical high impedance inputs (70 k?) for dynamic, magnetic or electret microphones\n? DTMF input with confidence tone on earphone and/or loudspeaker\n? Earphone amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain)\n? Digital volume control on earphone amplifier (4 steps)\n? Automatic Gain Control (AGC) for true line loss compensation\n? Microphone mute\n? Key tone mode.Supplies\n? Provides a strong 3.35 V regulated supply for microcontroller or dialler\n? Provides filtered power supply, optimized according to line current\n? Filtered 2.0 V power supply output for electret microphone\n? PD logic input for power-down.Handsfree\n? Asymmetrical high input impedance for electret microphone\n? Loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain\n? Dynamic limiter on loudspeaker amplifier to prevent distortion\n? Digital volume control on loudspeaker amplifier (8 steps)\n? Duplex controller consisting of:\n– Signal and noise envelope monitors for both channels (with adjustable sensitivities and timing)\n– Decision logic (with adjustable switch-over and Idle mode timing)\n– Voice switch control (with adjustable switching range and constant sum of gain during switching).;

GENERAL DESCRIPTION\nThe TEA1098A is an analog bipolar circuit dedicated for telephony applications. It includes a line interface, handset (HS) microphone and earpiece amplifiers, handsfree (HF) microphone and loudspeaker amplifiers and a duplex controller with signal and noise monitors on both channels. Digital volume control is available both on earphone and loudspeaker amplifiers.FEATURES\nLine interface\n? Low DC line voltage\n? Voltage regulator with adjustable DC voltage\n? Symmetrical high impedance inputs (70 k?) for dynamic, magnetic or electret microphones\n? DTMF input with confidence tone on earphone and/or loudspeaker\n? Earphone amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain)\n? Digital volume control on earphone amplifier (4 steps)\n? Automatic Gain Control (AGC) for true line loss compensation\n? Microphone mute\n? Key tone mode.Supplies\n? Provides a strong 3.35 V regulated supply for microcontroller or dialler\n? Provides filtered power supply, optimized according to line current\n? Filtered 2.0 V power supply output for electret microphone\n? PD logic input for power-down.Handsfree\n? Asymmetrical high input impedance for electret microphone\n? Loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain\n? Dynamic limiter on loudspeaker amplifier to prevent distortion\n? Digital volume control on loudspeaker amplifier (8 steps)\n? Duplex controller consisting of:\n– Signal and noise envelope monitors for both channels (with adjustable sensitivities and timing)\n– Decision logic (with adjustable switch-over and Idle mode timing)\n– Voice switch control (with adjustable switching range and constant sum of gain during switching).APPLICATIONS\n? Line powered telephone sets.

恩XP

TEA1098A

Speech and handsfree IC

PHI

TEA1098AH

Speech and handsfree IC

PHI

TEA1098ATV

Speech and handsfree IC

PHI

TEA1098H

Speech and handsfree IC

PHI

TEA1098TV

Speech and handsfree IC

PHI

TEA1098UH

Speech and handsfree IC

PHI