TLC7135CN

D Zero Reading for 0-V Input D Precision Null Detection With True Polarity at Zero D 1-pA Typical Input Current D True Differential Input D Multiplexed Binary-Coded-Decimal (BCD) Output D Low Rollover Error: ± 1 Count Max D Control Signals Allow Interfacing With UARTs or Microprocessors D Autoranging Capability With Over- and Under-Range Signals D TTL-Compatible Outputs D Second Source to Teledyne TSC7135, Intersil ICL7135, Maxim ICL7135, and Siliconix Si7135 D CMOS Technology ICL7135C, TLC7135C 4 1/2ĆDIGIT PRECISION ANALOGĆTOĆDIGITAL CONVERTERS SLAS074D − DECEMBER 1986 − REVISED SEPTEMBER 2003 DW OR N PACKAGE (TOP VIEW) VCC − 1 REF 2 ANLG COMMON 3 INT OUT 4 AUTO ZERO 5 BUFF OUT 6 Cref − 7 Cref + 8 IN − 9 IN + 10 VCC + 11 D5 12 B1 13 B2 14 28 UNDER RANGE 27 OVER RANGE 26 STROBE 25 RUN/HOLD 24 DGTL GND 23 POLARITY 22 CLK 21 BUSY 20 D1 19 D2 18 D3 17 D4 16 B8 15 B4 DESCRIPTION The ICL7135C and TLC7135C converters are manufactured with Texas Instruments highly efficient CMOS technology. These 4 1/2-digit, dual-slope-integrating, analog-to-digital converters (ADCs) are designed to provide interfaces to both a microprocessor and a visual display. The digit-drive outputs D1 through D4 and multiplexed binary-coded-decimal outputs B1, B2, B4, and B8 provide an interface for LED or LCD decoder/drivers as well as microprocessors. The ICL7135C and TLC7135C offer 50-ppm (one part in 20,000) resolution with a maximum linearity error of one count. The zero error is less than 10 µV an...