Features. Applications

Size: px

Start display at page:

Download "Features. Applications"

Mildred Sullivan
5 years ago
Views:

ALA ADAT Optical Encoder General Description The ALA OptoGen interface encodes four stereo pairs (8 channels) of digital audio and produces a single data stream suitable for transmission according to

1 ALA ADAT Optical Encoder General Description The ALA OptoGen interface encodes four stereo pairs (8 channels) of digital audio and produces a single data stream suitable for transmission according to the industry-standard ADAT Optical protocol (U.S. patent number,97,8). With an internal PLL to generate all needed clock signals, the ALA requires only Word Clock (Fs) for proper operation. A companion decoder, the AL 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 stereo pairs as inputs using standard DAC formats user bit inputs to transmit time-code, MIDI data, etc. Internal PLL generates required clocks from Word Clock. Applications Digital Mixing Boards Signal Processors Digital Effects Boxes Digital Recorders Computer Sound Boards Sound Reinforcement Products Package and pinout N/C N/C RESET NEG FMT FMT FMT FMT VDD OPDIGOUT USER USER USER USER IN 7/8 IN /6 IN / IN / pin SOIC Wavefront Semiconductor Scenic View Drive Cumberland, RI 86 U.S.A. Tel: Fax: info@wavefrontsemi.com On the web at A-9

2 Pin Descriptions Pin # Name Pin Type Description Power Ground pin N/C - No connection N/C - No connection Input Word clock. Equal to sample frequency (Fs) RESET Input Active low reset 6 NEG Input Sets phase of word clock 7 FMT Input Format, Sets data format 8 FMT Input Format. Sets data format 9 FMT Input Format. Sets data format FMT Input Format. Sets data format IN / Input Channels and data input IN / Input Channels and data input IN /6 Input Channels and 6 data input IN 7/8 Input Channels 7 and 8 data input USER Input User data bit input. Used to transmit timecode. 6 USER Input User data bit input. Used to transmit MIDI data. USER Input User data bit input. Reserved, tie low. 8 USER Input User data bit input. Reserved, tie low. OPDIGOUT Output Output to optical driver V DD Power power pin Electrical Characteristics and Operating Conditions Symbol Description Min Typ Max Units Electrical Characteristics and Operating Conditions V DD Supply Voltage... V I DD Supply Current -. - ma Fs Sample rate 8 khz Temp Temperature 7 C Outputs (OPDIGOUT) V OH Logical output voltage.9 V DD - - V DD V OL Logical output voltage - -. V DD V DD I OH Logical output current ma I OL Logical output current ma Inputs (, NEG, FMT, IN, USER, RESET) V IH Logical input voltage.7 V DD - - V DD V IL Logical input voltage - -. V DD V DD I IH Logical input current - - ua I IL Logical input current - - ua C IN Logic Input Capacitance - - pf

3 Formats Format Format Format Format Mode 6-bit right justified 8-bit right justified -bit right justified -bit right justified 6-bit left justified 8-bit left justified -bit left justified -bit left justified Reserved Reserved Reserved Reserved -bit right justified -bit left justified Reserved Mute Format Timing one period WordClock, WordNeg Low WordClock Right Just 6 Right Just 8 Right Just Right Just Left Just 6 Left Just 8 Left Just Left Just Right Just Left Just

4 Input Timing Symbol Description Min Typ Max Units t SI Setup of IN relative to center of bit period - nsec t HI Hold of IN relative to center of bit period - nsec t SU Setup of USER relative to end of right channel - - time nsec t HU Hold of USER relative to end of right channel - - time nsec Note: Above specifications hold after cycles Use The ALA OptoGen interface has been designed for ease of use and flexibility in systems designed to interface to the ADAT protocol. It supports both left and right justified 6, 8,, and -bit data formats for ease of integration into existing devices as well as new devices. These formats allow it to operate in parallel with many standard DACs. The designer uses the NEG, Format, Format, Format and Format pins to select the desired format. If NEG is high, the falling edge of signals the start of a new sample period. If low, the rising edge of signals the start of a new sample period. In both cases, the first sample data sent is the odd numbered (left) channel. The second is the even numbered (right) channel. The format pins are summarized in the Formats table. The ALA provides support for both the ADAT Type I format (6-bit) and the ADAT Type II format (-bit). USER is used to transmit the ADAT format -bit timecode. USER is used to transmit MIDI data. USER and USER are reserved and should be tied low. User bits are sampled at the edge that indicates the end of right channel data.

5 Package Information A C B Package Dimensions Dimensions (Typical) Inches Millimeters A..8 B.9 7. C.6. D.. E.8. F..6 G..7 H.. J..7 K. 8.9 L..8 Note: Dimension A does not include mold flash, protrusions or gate burrs. 7 nom K D nom E H J L G F

6 Sample Application Schematic OUTPUT VCC 7uH.uF INPUT VCC C_LIMIT TOTX* 6 OPTICAL OUT 8.k RESET OPTOGEN 6 OPDGOUT RESET NEG VDD IN / IN / IN /6 IN 7/8 USER USER 6 USER 8 USER 7 FMT 8 FMT 9 FMT FMT.uF IN / IN / IN /6 IN 7/8 TIME CODE MIDI DATA TORX* 6 OPTICAL IN.uF ERROR OPTOREC 6 OPDIGIN FMT FMT ERROR HOLDERR MODE MODE LINMODE MUTE VDD OPDIGTHRU OUT / OUT / OUT /6 OUT 7/8 USER USER USER USER DVCO SVCO BCLK uF OPDIGTHRU OUT / OUT / OUT /6 OUT 7/8 SVCO DVCO TIME CODE MIDI DATA (Master Mode, can be MCLK) (Slave Mode) (Master Mode) BCLK (Master Mode) * Optical I/O parts shown are Toshiba parts. The Sharp GPFRT or equivalent is also compatible. LEFTIN LEFTOUT INL/R BCLK MCLK RIGHTIN OUTL/R BCLK MCLK RIGHTOUT ADC DAC The OptoGen accepts input from an ADC, then outputs the Alesis optical format. The OptoRec accepts input in Alesis optical format, then outputs to a DAC. 6

7 NOTICE Wavefront Semiconductor reserves the right to make changes to their products or to discontinue any product or service without notice. All products are sold subject to terms and conditions of sale supplied at the time of order acknowledgement. Wavefront Semiconductor assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Information contained herein is only for illustration purposes and may vary depending upon a user s specific application. While the information in this publication has been carefully checked, no responsibility is assumed for inaccuracies. Wavefront Semiconductor products are not designed for use in applications which involve potential risks of death, personal injury, or severe property or environmental damage or life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. All trademarks and registered trademarks are property of their respective owners. Contact Information: Wavefront Semiconductor Scenic View Drive Cumberland, RI 86 U.S.A. Tel: Fax: On the web at info@wavefrontsemi.com Copyright Wavefront Semiconductor Datasheet September Reproduction, in part or in whole, without the prior written consent of Wavefront Semiconductor is prohibited. 7

Features. High-Speed, low-cost audio DSP engine. Internal PLL - User need only supply. WORDCLK at the desired sample rate.

Features. High-Speed, low-cost audio DSP engine. Internal PLL - User need only supply. WORDCLK at the desired sample rate. 1 1KS 1 8 1KM 14 AL3101/2CG DSP-1K(M/S) Audio Processors Lead free Complies with RoHS directive General The DSP-1K Audio Processor is a fast, low cost signal processor optimized for signal filtering, equalization,