AD1891
Key Features
- The input and output sample clock frequencies can nominally range from 8 kHz to 56 kHz, 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 bit clocks can also be independently configured for rising edge active or falling edge active operation
- Refer to the “Theory of Operation” section of this data sheet for a more thorough functional description
