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¡¡¡¡The AD7693 is a 16-bit£¬ successive approximation analog-todigital converter £¨ADC£© that operates from a single power supply£¬ VDD. It contains a low power£¬ high speed£¬ 16-bit sampling ADC with no missing codes£¬ an internal conversion clock£¬ and a versatile serial interface port. The reference voltage£¬ VREF£¬ is applied externally and can be set up to the supply voltage£¬ VDD. On the CNV rising edge£¬ it samples the voltage difference between the IN+ and IN? pins. The voltages on these pins swing in opposite phase between 0 V and VREF about VREF/2. Its power scales linearly with throughput. Using the SDI input£¬ the SPI-compatible serial interface also features the ability to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V£¬ 2.5 V£¬ 3 V£¬ or 5 V logic£¬ using the separate VIO supply. The AD7693 is housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from ?40¡ãC to +85¡ãC.