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TRANSFORMERS FOR DIGITAL AUDIO

DATA TRANSMISSION

For Use with Cirrus Logic’s CS8401,

CS8402, CS8403 & CS8404 ICs

Pulse Jack

E l e c t r o n i c s

These transformers have been designed for use at the

interface between line driver and receiver and the interconnecting medium in Digital Audio

Data Transmission Systems according to AES 3-199X or IEC 958. In such systems, two chan-

nels of periodically sampled and uniformly quantized audio signals are transmitted on a

single shielded twisted pair.

The electrical parameters of the interface are based on those of CCITT V.II or balanced volt-

age digital circuits which allow signal transmission up to a few hundred meters.

The isolation transformers are essential in improving the balance of the transmitter and the

receiver circuitry, and reducing common mode noise and EMI.

These transformers are recommended for use with the Cirrus Logic CS8401, CS8402, CS8403

and CS8404 “Digital Audio Interface Transmit Device.”

The schematic below represents an implementation of transmit and receive circuits using

isolation transformers at both ends. Equalization in the receiver may permit to increase the

length of the interconnecting cable.

Transmitter

Interconnecting Cable

Equalization

Receiver

T1, T2: PE-65612 or PE-65812

Application Circuit

Application

Applicable Documents

AES 3-1985 (ANSI S4.40-1985), AES 3-199XDraft, IEC 958, CP-340, EBU 3250

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Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be

trademarks or registered trademarks of their respective owners. © Copyright, 2013. Pulse Electronics, Inc. All rights reserved.