Part # AD1890_1891 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD1890/AD1891 SamplePort Stereo Asynchronous Sample Rate Converters

Part Details:

a SamplePort Stereo Asynchronous Sample Rate Converters AD1890/AD1891 FEATURES SYSTEM DIAGRAM Automatically Sense Sample Frequencies--No Programming Required EXAMPLE EXAMPLE Tolerant of Sample Clock Jitter FREQUENCIES: FREQUENCIES: DAT 48kHz OR DAT 48kHz OR Smooth Transition When Sample Clock Frequencies CD 44.1kHz OR CD 44.1kHz OR Cross BROADCAST 32kHz BROADCAST 32kHz Accommodate Dynamically Changing Asynchronous AD1890/ AD1891 Sample Clocks INPUT SAMPLE CLOCK OUTPUT SAMPLE CLOCK 8 kHz to 56 kHz Sample Clock Frequency Range1:2 to 2:1 Ratio Between Sample Clocks INPUT SERIAL DATA OUTPUT SERIAL DATA ­106 dB THD+N at 1 kHz (AD1890)120 dB Dynamic Range (AD1890)Optimal Clock Tracking Control ­Short/Long Group Delay Modes the two clocks. The input and output sample clock frequencies ­Slow/Fast Settling Modes can nominally range from 8 kHz to 56 kHz, and the ratio Linear Phase in All Modes between them can vary from 1:2 to 2:1. Equivalent of 4 Million 22-Bit FIR Filter Coefficients The AD1890/AD1891 use multirate digital signal processing Stored On-Chip techniques to construct an output sample stream from the input Automatic Output Mute sample stream. The input word width is 4 to 20 bits for the Flexible Four Wire Serial Interfaces AD1890 or 4 to 16 bits for the AD1891. Shorter input words Low Power are automatically zero-filled in the LSBs. The output word APPLICATIONS width for both devices is 24 bits. The user can receive as many Digital Mixing Consoles and Digital Audio Workstations of the output bits as desired. Internal arithmetic is performed CD-R, DAT, DCC and MD Recorders with 22-bit coefficients and 27-bit accumulation. The digital Multitrack Digital Audio and Video Tape Recorders samples are processed with unity gain.

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AD1890_1891.pdf Datasheet