The main elements of the AD1843 are its extensive input and mix1 Hz Resolution Programmable Sample Rates from 4 kHz ing section, its two channels of sigma-delta () analog-to-digital to 54 kHz Derived from a Single Clock Input conversion, its four channels of digital-to-analog conversion, its 80-Lead PQFP and 100-Lead TQFP Packages digital filters, and the clock and control circuitry for implementing Operation from +5 V or Mixed +5 V/+3 V Supplies the device's different modes. The AD1843 permits flexible sampleFIFO-Buffered Serial Digital Interface Compatible with rate selection through programming and external synchronization, ADSP-21xx Fixed-Point DSPs