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Partname:AD1890JPZ-REEL
Description:SamplePort Stereo ASRC for 18 and 20 bit applications
Manufacturer:Analog Devices
Pins:28
Datasheet:PDF (416K).
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The AD1890 and AD1891 SamplePortsTM are fully digital, stereo Asynchronous Sample Rate Converters (ASRCs) that solve sample rate interfacing and compatibility problems in digital audio equipment. Conceptually, these converters interpolate the input data up to a very high internal sample rate with a time resolution of 300 ps, then decimate down to the desired output sample rate. The AD1890 is intended for 18- and 20-bit professional applications, and the AD1891 is intended for 16-bit lower cost applications where large dynamic sample-rate changes are not encountered. These devices are asynchronous because the frequency and phase relationships between the input and output sample clocks (both are inputs to the AD1890/AD1891 ASRCs) are arbitrary and need not be related by a simple integer ratio. There is no need to explicitly select or program the input and output sample clock frequencies, as the AD1890/AD1891 automatically sense the relationship between SamplePort and SamplePorts are trademarks of Analog Devices, Inc.

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