G.726 ADPCM Processor

Overview

Technical Documents

Ordering Info

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Status

All versions are Not Recommended for New Designs.

Description

The DS2164Q ADPCM processor chip is a dedicated digital-signal-processing (DSP) chip that has been optimized to perform adaptive differential pulse-code modulation (ADPCM) speech compression at three different rates. The chip can be programmed to compress (expand) 64kbps voice data down to (up from) either 32kbps, 24kbps, or 16kbps. The compression to 32kbps follows the algorithm specified by CCITT recommendation G.726. The DS2164Q can switch compression algorithms on-the-fly. This allows the user to make maximum use of the available bandwidth on a dynamic basis.

Data Sheet

Download	Rev 1	(PDF, 272kB)
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Errata DS2164Q 2164QA1.pdf

Key Features

Compresses/expands 64kbps PCM voice to/from either 32kbps, 24kbps, or 16kbps as per the CCITT/ITU G.726 specification
Dual, fully independent channel architecture; device can be programmed to perform either:
- two expansions
- two compressions
- one expansion and one compression
Interconnects directly to combo-codec devices
Input to output delay is less than 375µs
Simple serial port used to configure the device
On-board time slot assigner circuit (TSAC) function allows data to be input/output at various time slots
Supports channel associated signaling
Each channel can be independently idled or placed into bypass
Available hardware mode requires no host processor; ideal for voice storage applications
Backward-compatible with the DS2165 ADPCM processor chip
Single +5V supply; low-power CMOS technology
Available in 28-pin PLCC

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Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Errata Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 1; 2002-07-11
This page last modified: 2007-06-21