ML7022-01
Single Rail Dual Channel PCM CODEC
 

Documents

Applications

Description

The ML7022 is a single-rail two-channel DSP CODEC IC for voice telecom line card applications. This device incorporates dual 3-bit latches to directly control the modes of operation (Borscht functions) of a complimentary SLIC. This functionality simplifies the design process, and provides a seamless interface with popular SLICs such as Ericsson's PBL38630/40 and Intersil's UniSLIC14.

A parametric performance enhancement is obtained by providing on-chip delta-sigma ADC and DAC converters to enhance frequency response, signal-to-noise, and idle channel noise. In order to meet industry system specifications, like Bellcore's TR-57 for digital-loop carriers (DLC), a proprietary DSP was developed by Oki engineers for telecom voice applications.

Oki Semiconductor utilizes its advanced 0.45-µ double-poly CMOS process, coupled with a reduced footprint 30-pin SSOP package.

Block Diagram

Features

»	Single 5-V Power Supply Operation
»	Using ADC and DAC Technique
»	Low Power Consumption »  2-Channel Operating Mode : typical: 70 mW max.: 90 mW »  1-Channel Operating Mode : typical: 40 mW max.: 55 mW »  Power Saving Mode : (CPD1=CPD2="0") typical: 9 mW max.: 12.5 mW »  Power Down Mode : (PDN="0") typical: 0.05 mW max.: 0.25 mW
»	ITU-T Companding Law - µ-law
»	Built-in Dual 3-bit Latches with CMOS Drive Capability
»	Serial PCM Interface
»	Master Clock : 4.096 MHz
»	Transmission Clocks: 256 to 4096 kbps
»	Adjustable Transmit Gain
»	Built-in Reference Voltage Supply
»	Analog Output can Directly Drive a 600 Line Transformer
»	Echo-back Function enables readback of latch data
»	Package Type: 30-pin plastic SSOP (SSOP30-P-56-0.65-K) (Product name : ML7022-01MB)