The TC7117CKW is a 3½ digit CMOS analog-to-digital converter (ADC) 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 TC7117CKW drives common anode light emitting diode (LED) displays directly with an 8mA drive current per segment. These devices incorporate a display hold (HLDR) function. Roll-over error (the difference in readings for equal magnitude but opposite polarity input signals) is below ±1 count. High-impedance differential inputs offer 1 pA leakage current and a 1012 Ohm input impedance. The auto-zero cycle guarantees a zero display reading with a 0V input.
Feature
- Low Temperature Drift Internal Reference
- 80 ppm/°C Typ.
- Display Hold Function
- Directly Drives LED Display
- Guaranteed Zero Reading with Zero Input
- Auto-Zero Cycle Eliminates Need for Zero Adjustment Potentiometer
- True Polarity Indication for Precision Null Applications
- High Impedance CMOS Differential Inputs: 1012 Ohm
