ADC1205

ADC1205 ADC1225 12-Bit Plus Sign mP Compatible A D Converters June 1994 ADC1205 ADC1225 12-Bit Plus Sign mP Compatible A D Converters General Description The ADC1205 and ADC1225 are CMOS 12-bit plus sign successive approximation A D converters The 24-pin ADC1205 outputs the 13-bit data result in two 8-bit bytes formatted high-byte first with sign extended The 28-pin ADC1225 outputs a 13-bit word in parallel for direct interface to a 16-bit data bus Negative numbers are represented in 2’s complement data format All digital signals are fully TTL and MOS compatible A unipolar input (0V to 5V) can be accommodated with a single 5V supply while a bipolar input (b5V to a 5V) requires the addition of a 5V negative supply The ADC1205C and ADC1225C have a maximum non-linearity of 0 0224% of Full Scale Key Specifications Y Y Y Resolution 12 bits plus sign Linearity Error g 1 LSB Conversion Time 100 ms Features Y Y Y Y Y Y Compatible with all mPs True differential analog voltage inputs 0V to 5V analog voltage range with single 5V supply TTL MOS input output compatible Low power 25 mW max Standard 24-pin or 28-pin DIP Connection and Functional Diagrams Dual-In-Line Package Top View Dual-In-Line Package TL H 5676–1 TL H 5676 – 3 See Ordering Information Top View TL H 5676–2 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL H 5676 RRD-B30M115 Printed in U S A Absolute Maximum Ratings (Notes 1 2) Operating Con...