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Echo Canceller LSI

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Optimum solution for hands-free call through portable device and intercom.

Description

• Echo canceller

Part Name Description
ML7202-001
datasheet[pdf]		 Dual echo canceller (64ms x 2ch, μ/A-law I/F)＋ ADPCM Transcoder

• Echo canceller/noise canceller

Part Name Description
ML7037-003 Dual echo canceller / noise canceller with dual codec

Specification

• Echo canceller

Part Name Package Cancelable
Echo
Delay Time		 Voice
Signal
Interface		 Power
Supply
(V)		 Operating
Frequency		 Notes
ML7202-001 64TQFP 64ms/channel μ-law, A-law 3.0 to 3.6 19.2MHz Tone Gen/Det., VOX, Gain Control,
Time Slot Assignment, etc.

• Echo canceller/noise canceller

Part Name Feature Package Cancelable
Echo
Delay Time		 Voice
Signal
Interface		 Power
Supply
(V)		 Operating
Frequency		 Notes
ML7037-003
datasheet[pdf]		 Dual echo canceller /
noise canceller with
dual codec		 64TQFP Acoustic
side 64ms,
Line side
20ms		 Acoustic side: analog
Line side :
analog,16-bit linear,
μ-law analog		 3.0 to 3.6 12.288MHz Noise
cancellation
= 6 to 18dB(Typ.)

Applications

  • Hands-free kit and speaker phone
    • Sound echo cancel function
  • Office telephone exchange and terminal adaptor
    • Line echo cancel function that returns in 2/4 line conversion hybrid circuit
Application Example

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