TC7116A Datasheet | Microchip Technology

Features : - Low Temperature Drift Internal Reference: - TC7116/TC7117 80 ppm/°C, Typ. - TC7116A/TC7117A 20 ppm/°C, Typ. - Display Hold Function - Directly Drives LCD or LED Display - Zero Reading with Zero Input - Low Noise for Stable Display: - 2V or 200m V Full Scale Range (FSR) - Auto-Zero Cycle Eliminates Need for Zero - Adjustment Potentiometer - True Polarity Indication for Precision Null Applications - Convenient 9V Battery Operation: (TC7116/TC7116A) - High-Impedance CMOS Differential Inputs: 1012 - Low-Power Operation: 10m W Applications: - Thermometry - Bridge Readouts: Strain Gauges, Load Cells, Null Detectors - Digital Meters: Voltage/Current/Ohms/Power, p H - Digital Scales, Process Monitors - Portable Instrumentation Device Selection Table Package Code Package Temperature Range CPL IJL CKW CLW 40-Pin PDIP 40-Pin CERDIP 44-Pin PQFP 44-Pin PLCC 0C to +70C -25C to +85C 0C to +70C 0C to +70C General Description : The TC7116A/TC7117A are 3-1/2 digit CMOS Analogto-Digital Converters (ADCs) containing all the active ponents necessary to construct a 0.05% resolution measurement system. Seven-segment decoders, polarity and digit drivers, voltage reference, and clock circuit are integrated on-chip. The TC7116A drives Liquid Crystal Displays (LCDs) and includes a backplane driver. The TC7117A drives mon anode Light Emitting Diode (LED) displays directly with an 8m A drive current per segment. These devices incorporate a display hold (HLDR) function. The displayed reading remains indefinitely, as long as HLDR is held high. Conversions continue, but output data display latches are not updated. The reference low input (VREF-) is not available, as it is with the TC7106/7107. VREF- is tied internally to analog mon in the TC7116A/7117A devices. The TC7116A/7117A reduces linearity error to less than 1 count. Rollover error (the difference in readings for equal magnitude but opposite polarity input signals) is below ±1 count. High-impedance differential...