AL1401AG
ADAT® Optical Encoder
Lead Free – Complies with RoHS Directive
Wavefront Semiconductor 200 Scenic View Drive Cumberland, RI 02864 U.S.A.
Tel: +1 401 658–3670 Fax: +1 401 658–3680 Email: info@wavefrontsemi.com
On the web at www.wavefrontsemi.com
1
AL1401AG–0305
General Description
The AL1401AG OptoGen interface encodes
four stereo pairs (8 channels) of digital
audio and produces a single datastream
suitable for transmission according to the
industry–standard ADAT Optical protocol
(U.S. patent number 5,297,181).
With an internal PLL to generate all
needed clock signals, the AL1401AG
requires only wordclock (Fs) for proper
operation.
A companion decoder, the AL1402
OptoRec™, is also available.
Use of the ADAT Optical interface
(including the OptoGen and OptoRec)
requires a license agreement (generally
royalty–free) between the manufacturer
and Wavefront Semiconductor. Details
and agreement information are available
upon request from Wavefront directly, or
on our web site.
Features
Compatible with ADAT Type I and II
formats
4 stereo pairs as inputs using standard
DAC formats
4 user bit inputs to transmit time–code,
MIDI data, etc.
Internal PLL generates all required clocks
from wordclock
Lead Free – Complies with RoHS
Directive
Applications
Digital Mixing Boards
Signal Processors
Digital Effects Boxes
Digital Recorders
Computer Sound Boards
Sound Reinforcement Products
Package
GND
N/C
FMT1
FMT2
FMT3
FMT0
WDCLK
RESET
WDCLKNEG
N/C
USER0
USER1
USER2
USER3
VDD
IN 7/8
IN 5/6
IN 3/4
IN 1/2
OPDIGOUT
20 pin SOIC
300 mils wide
Table of Contents
General Description ………….……………………………….….…..…………….. 1
Features …………………………………………………………..…………….……… 1
Applications ……………………………………………..……………..……………... 1
Package …..……………………………….………………………….……..….…..…… 1
Table of Contents ………………..………………………………………….………. 2
Pin Descriptions …………………………………………………………………….. 2
Electrical Characteristics …………………………………….…..…………….… 3
Architecture Details …..……..…………………………………………………….. 3
Serial Input Interface ………....……...………………………………....… 3
Serial Input Format Selection ……..……...………..…………… 3
Serial Input Formats ………….……….…….………….….……… 4
Serial Input Timing …….……….……..…….………….….……… 4
Wordclock Selection ……………….……..…….…..…………....………… 4
ADAT Optical Datastream ………...…………….…….….…..……….…. 5
Reset Circuitry …………….….………………………….…..…..………….. 5
Clock Generator and PLL ….……...……………..……....…..………….. 5
Package Dimensions ………………………………………….…………………….. 5
Sample Application Schematic ….…………………………….………………… 6
Notice and Contact Information ………………………………………………... 7
Pin Descriptions
Pin# Name Pin Type Description
