TEA1098 データシートの表示（PDF） - Philips Electronics

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TEA1098

Speech and handsfree IC

Philips Electronics 

Philips Semiconductors

Speech and handsfree IC

Product specification

TEA1098

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

• 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

microcontrollers or diallers

• 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

• Logarithmic volume control on loudspeaker amplifier via

linear potentiometer

• Duplex controller consisting of:

– Signal and noise envelope monitors for both

channels (with adjustable sensitivities and timing)

– Decision logic (with adjustable switch-over and Idle

mode timing)

– Voice switch control (with adjustable switching range

and constant sum of gain during switching).

APPLICATIONS

• Line powered telephone sets.

GENERAL DESCRIPTION

The TEA1098 is an analog bipolar circuit dedicated to

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.

This IC provides a 3.35 V supply for a microcontroller or

dialler and a 2.0 V filtered voltage supply for an electret

microphone.

ORDERING INFORMATION

TYPE

NUMBER

TEA1098TV

TEA1098H

NAME

VSO40

QFP44

TEA1098UH

−

PACKAGE

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

bare die; on foil

VERSION

SOT158-1

SOT307-2

−

1999 Oct 14

2

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