ml7037 Oki Semiconductor, ml7037 Datasheet

ml7037

Manufacturer Part Number

ml7037

Description

Ml7037-003 Dual Echo Canceler & Noise Canceler With Dual Codec For Hands-free

Manufacturer

Oki Semiconductor

Datasheet

1.ML7037.pdf (41 pages)

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GENERAL DESCRIPTION

The ML7037-003 is an IC device developed for portable, handsfree communication with built-in line echo

canceler, acoustic echo canceler, and transmission signal noise canceler. Built-in to the voice signal interface is a

PCM CODEC for the analog interface on the acoustic-side, and another PCM CODEC for the analog interface on

the line-side. On the line-side, in addition to the analog interface, there is also a -law PCM/16-bit linear digital

interface.

Equipped with gain and mute controls for data transmission and reception, a -law PCM/16-bit linear digital

interface for memo recording and message output, and transfer clock and sync clock generators for digital

communication, this device is ideally suited for a handsfree system.

FEATURES

• Single 3.3 V Power Supply Operation (3.0 to 3.6 V) [with built-in regulator to generate internal power supply]

• Built-in 2-channel (line and acoustic) echo canceler

• Built-in transmission signal noise canceler

• Built-in 2-channel CODEC’s

• Analog input gain amp’s (Acoustic side = 2 stages; Line-side = 1 stage)

• Analog output configuration : Push-pull drive (can drive a 2.0 k

• Receive-side ALC (Auto Level Controler)

• Programmable Gain/Mute

• A slope filter on transmit side

• 16 GPI’s and 8 GPO’s

• Speech digital interface coding formats

• Speech digital interface sync formats

• PCM shift clocks (BCLK)

• Master clock frequency : 12.288 MHz (crystal unit the ML7037’s built-in driving circuit for a crystal unit or a

• Transmission signal equalizer

• Package

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* This is a digest version of the ML7037-003 datasheet. Ask an OKI sales for a full version before you start actual designing

OKI Semiconductor

ML7037-003

Dual Echo Canceler & Noise Canceler with Dual Codec for Hands-Free

activities.

Echo attenuation

Cancelable echo delay time

Noise attenuation

Clock slave mode

Clock master mode : 64kHz (µ-law PCM) / 128kHz (16bit Linear PCM)

Single echo canceler mode (only an acoustic echo canceler is enabled)

Dual echo canceler mode (both of an acoustic and line echo cancelers are enabled)

Tacoud= 64 ms (max)

Tacoud = 64 ms

: 64-pin plastic TQFP (TQFP64-P-1010-0.50-K) (ML7037-003TB)

: 64kHz to 2.048MHz (µ-law PCM) / 128kHz to 2.048MHz (16bit Linear PCM)

crystal oscillator)

: 13 dB (typ.) for white noise

: 35 dB (typ.) for white noise

Tlined = 20 ms

: µ-law PCM (G.711 [64kbps]), 16-bit linear (2's complement)

: Long-frame-sync, short-frame-sync

load

)

PEDL7037-003-05Zz_Digest

Issue Date: May. 21, 2007

1/41

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