TC7116/A/TC7117/A
3-1/2 Digit Analog-to-Digital Converters with Hold
Features: General Description: Low Temperature Drift Internal Reference:
-TC7116/TC7117 80 ppm/В°C, Typ.
-TC7116A/TC7117A 20 ppm/В°C, Typ. Display Hold Function Directly Drives LCD or LED Display Zero Reading with Zero Input Low Noise for Stable Display:
-2V or 200mV 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: 1012пЃ— Low-Power Operation: 10mW The TC7116A/TC7117A are 3-1/2 digit CMOS Analogto-Digital Converters (ADCs) containing all the active
components 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 common anode Light
Emitting Diode (LED) displays directly with an 8mA
drive current per segment. Applications: Thermometry Bridge Readouts: Strain Gauges, Load Cells,
Null Detectors Digital Meters: Voltage/Current/Ohms/Power, pH Digital Scales, Process Monitors Portable Instrumentation Device Selection Table
Package Code
CPL Package 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 В±1 count. High-impedance differential inputs
offer 1pA leakage current and a 1012пЃ— input impedance. The 15пЃVP-P noise performance enables a “rock
solid” reading. The auto-zero cycle ensures a zero …