ADC1251 Datasheet | National Semiconductor

Description The ADC1251 is a CMOS 12-bit plus sign successive approximation analog-to-digital converter On request the ADC1251 goes through a self-calibration cycle that adjusts for any zero full scale or linearity errors The ADC1251 also has the ability to go through an Auto-Zero cycle that corrects the zero error during every conversion The analog input to the ADC1251 is tracked and held by the internal circuitry so an external sample-and-hold is not required The ADC1251 has an S H control input which directly controls the track-and-hold state of the A D A unipolar analog input voltage range (0 to a 5V) or a bipolar range (b5V to a 5V) can be acmodated with g 5V supplies The 13-bit data result is available on the eight outputs of the ADC1251 in two bytes high-byte first and sign extended The digital inputs and outputs are patible with TTL or CMOS logic levels 8-bit m P DSP interface Bipolar input range with a single a 5V reference No missing codes over temperature TTL MOS input output patible Key Specifications Y Y Y Y Y Y Y Resolution Conversion Time Sampling Rate Linearity Error Zero Error Full Scale Error Power Consumption 12 bits plus sign 8 ms (max) 83 k Hz (max) g 0 6 LSB ( g 0 0146%) (max) g 1 LSB (max) g 1 5 LSB (max) g 5V 113 m W (max) Applications Features Digital signal processing High resolution process control Instrumentation Self-calibration provides excellent temperature stability Internal sample-and-hold Simplified Block Diagram Connection Diagram Dual-In-Line Package TL H 11024 - 2 Top View Ordering Information Industrial (b40 C s TA s a 85 C) ADC1251BIJ ADC1251CIJ TL H 11024 - 1 Package J24A Military Package (b55 C s TA s a 125 C) ADC1251CMJ ADC1251CMJ 883 J24A TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL H 11024 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Notes 1 2) Operating Ratings (Notes 1 Temperature Range ADC1251BIJ...