GENERAL DESCRIPTION
Differential analog voltage inputs allow increasing the common-mode rejection and offsetting the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow encoding any smaller analog voltage span to the full 8 bits of resolution. n Differential analog voltage inputs n Logic inputs and outputs meet both MOS and TTL voltage level specifications n Works with 2.5V (LM336) voltage reference n On-chip clock generator n 0V to 5V analog input voltage range with single 5V supply n No zero adjust required n 0.3" standard width 20-pin DIP package n 20-pin molded chip carrier or small outline package n Operates ratiometrically or with 5 VDC, 2.5 VDC, or analog span adjusted voltage reference Key Specifications n Resolution n Total error n Conversion time 8 bits FEATURES
n Compatible with 8080 µP derivatives — no interfacing logic needed - access time - 135 ns n Easy interface to all microprocessors, or operates “stand alone” ± 1⁄4 LSB, ±...
National Semiconductor
