TEA1098ATV PHILIPS [NXP Semiconductors], TEA1098ATV Datasheet - Page 2

• Manufacturer Part Number: TEA1098ATV
• Description: Speech and handsfree IC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
FEATURES
Line interface
Supplies
Handsfree
ORDERING INFORMATION
2000 Mar 21
TEA1098ATV
TEA1098AH
TYPE NUMBER
Low DC line voltage
Voltage regulator with adjustable DC voltage
Symmetrical high impedance inputs (70 k ) 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.
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.
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)
Speech and handsfree IC
VSO40
QFP44
NAME
plastic very small outline package; 40 leads
plastic quad flat package; 44 leads (lead length 1.3 mm);
body 10
10 1.75 mm
2
DESCRIPTION
APPLICATIONS
GENERAL DESCRIPTION
The 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.
This IC provides a 3.35 V strong supply for a
microcontroller and a 2.0 V filtered voltage supply for an
electret microphone.
PACKAGE
Duplex controller consisting of:
– signal and noise envelope monitors for both channels
– decision logic (with adjustable switch-over and Idle
– voice switch control (with adjustable switching range
Line powered telephone sets.
(with adjustable sensitivities and timing)
mode timing)
and constant sum of gain during switching).
Preliminary specification
TEA1098A
VERSION
SOT158-1
SOT307-2