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