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TEA1098A

Features: Line interface 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...

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SeekIC No. : 004517247 Detail

TEA1098A: Features: Line interface 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 confi...

TEA1098A Data Sheet

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Part Number:
TEA1098A
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/17

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Product Details

Description



Features:

Line interface
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.
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)
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).


Application

 Line powered telephone sets.


Pinout

Connection Diagram Connection Diagram


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.




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