ML2252

May 1997 ML2252*, ML2259** µP Compatible 8-Bit A/D Converters with 2- or 8-Channel Multiplexer GENERAL DESCRIPTION The ML2252 and ML2259 combine an 8-bit A/D converter, 2- or 8-channel analog multiplexer, and a microprocessor compatible 8-bit parallel interface and control logic in a single monolithic CMOS device. Easy interface to microprocessors is provided by the latched and decoded multiplexer address inputs and a double buffered three-state data bus. These analog-todigital converters allow the microprocessor to operate completely asynchronous to the converter clock. The built in sample and hold function provides the ability to digitize a 5V, 50kHz sinewave to 8-bit accuracy. The differential comparator design provides low power supply sensitivity to DC and AC variations. The voltage reference can be externally set to any value between ground and VCC, thus allowing a full conversion over a relatively small span. All parameters are guaranteed over temperature with a power supply voltage of 5V ±10%. The device is suitable for a wide range of applications from process and machine control to consumer, automotive, and telecommunication applications. FEATURES s s s s s s s s s s s s s Conversion time (fCLK = 1.46MHz); 6.6µs Total unadjusted error; ±1/2LSB or ±1LSB No missing codes Sample and hold; 390ns acquisition Capable of digitizing a 5V, 50kHz sinewave 2- or 8-channel input multiplexer 0V to 5V analog input range with single 5V power supply Operates ratiometrically or w...