IC Device Developed for Portable Communication

     
     

The ML7037-002 is an IC device developed for portable, hands free communication with built-in line echo canceller, acoustic echo canceller, and transmission signal noise canceller. 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 µ-law PCM/16-bit linear digital interface. Equipped with gain and mute controls for data transmission and reception, a µ-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 hands free system. Target markets include telematics, security access controls, speakerphones, and other emerging voice recognition technologies.

An evaluation board is available for the ML7037. This evaluation kit is designed to facilitate evaluation of the ML7037-002. The evaluation kit comprises of an evaluation board, a ML7037- 002TB sample in an LSI socket aboard, a PC control interface
board (MCU I/F BOARD), a power cord for the PC control interface board (for connecting the ML7037 board and the MCU I/F board), 4pcs of 3.5mm audio plugs, a 9pin-25pin serial cable, 6 a 10-pin flat cable (for connecting the eval board and
the MCU I/F board), a power cord for the evaluation board, and a CD-ROM (for installing PC control software).

     
     
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 canceller Echo attenuation: 35 dB (typ.) for white noise Cancelable
echo delay time:Single echo canceller mode (only an acoustic echo canceller is enabled) Tacoud= 100 ms (max)
Dual echo canceller mode (both of an acoustic and line echo cancellers are enabled) Tacoud = 100 ms Tlined = 20 ms
Built-in transmission signal noise canceller Noise attenuation: 13 dB (typ.) for white noise
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 kΩ load)
Receive-side ALC’s (Auto Level Controllers)
Programmable Gain/Mute
A slope filter on transmit side
16 GPI’s and 5 GPO’s
Speech digital interface coding formats: µ-law PCM (G.711 [64kbps]), 16-bit linear (2’s complement)
Speech digital interface sync formats: Long-frame-sync, short-frame-sync
PCM shift clocks (BCLK) Clock slave mode: 64kHz to 2.048MHz (µ-law PCM)
/128kHz to 2.048MHz (16bit Linear PCM) Clock master mode:64kHz
(µ-law PCM) / 128kHz (16bit Linear PCM)
Master clock frequency: 12.288 MHz(crystal unit the ML7037’s built-in
driving circuit for a crystal unit or a crystal oscillator)
Package: 64-pin plastic TQFP
(TQFP64-P-1010-0.50-K) (ML7037-002TB)
   
Datasheets
Oki ML7037-002 Evaluation Board
   
 

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