ADC0844 Datasheet | National Semiconductor

Description The ADC0844 and ADC0848 are CMOS 8-bit successive approximation A/D converters with versatile analog input multiplexers. The 4-channel or 8-channel multiplexers can be software configured for single-ended, differential or pseudo-differential modes of operation. The differential mode provides low frequency input mon mode rejection and allows offsetting the analog range of the converter. In addition, the A/D’s reference can be adjusted enabling the conversion of reduced analog ranges with 8-bit resolution. The A/Ds are designed to operate from the control bus of a wide variety of microprocessors. TRI-STATE ® output latches that directly drive the data bus permit the A/Ds to be configured as memory locations or I/O devices to the microprocessor with no interface logic necessary. Features n Easy interface to all microprocessors n Operates ratiometrically or with 5 VDC voltage reference n No zero or full-scale adjust required n 4-channel or 8-channel multiplexer with address logic n Internal clock n 0V to 5V input range with single 5V power supply n 0.3" standard width 20-pin or 24-pin DIP n 28 Pin Molded Chip Carrier Package Key Specifications n n n n n Resolution Total Unadjusted Error Single Supply Low Power Conversion Time 8 Bits ± 1⁄2 LSB and ± 1 LSB 5 VDC 15 m W 40 µs Block and Connection Diagrams DS005016-1 - ADC0848 shown in DIP Package CH5-CH8 not included on the ADC0844 TRI-STATE ® is a registered trademark of National Semiconductor Corp. © 1999 National Semiconductor Corporation DS005016 .national. Block and Connection Diagrams Molded Chip Carrier Package (Continued) Dual-In-Line Package Dual-In-Line Package DS005016-2 Top View DS005016-29 DS005016-30 Top View See Ordering Information Top View Ordering Information Temperature Range 0˚C to +70˚C ADC0848BCN ADC0848CCN ADC0844BCJ - 40˚C to +85˚C ADC0844CCJ ADC0848BCV ADC0848CCV 8 4 8 Total Unadjusted Error MUX Channels 4 Package Outline N20A Molded Dip N24C Molded Dip J20A Cerdip V28A...