The AS1545 from austriamicrosystems is a dual high-speed successive-approximation ADC which offers 12-bit resolution on each of the two ADCs. At a conversion speed of 1 MSps and including the internal 2,5 V reference, the device uses only 5,5 mA, while in full power-down mode the supply current drops to less than 1 μA. Two complete and independent ADC channels allow simultaneous sampling and conversion. The 12 input channels are software configurable, allowing each ADC to offer six single-ended channels or three fully or pseudo differential pairs, as programmed. The conversion result of both ADCs is simultaneously available on separate data lines or in succession on one data line if only one serial port is available. The AS1545 operates from a single 2,7 to 5,25 V supply and contains a Vdrive (interface drive voltage) function which enables the serial interface to connect directly to either 3 or 5 V processor systems independent of the ADC's supply voltage.
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