TC7117CKW713

ADCs/DACs - Special Purpose Overview

The TC7117CKW713 is a 3-1/2 digit CMOS Analog-to-Digital Converter (ADC) manufactured by Microchip Technology. It integrates seven-segment decoders, polarity and digit drivers, a voltage reference, and clock circuitry to construct a measurement system with 0.05% resolution. The device directly drives common anode LED displays with an 8mA segment drive current. Key electrical characteristics include a low noise performance of 15µV peak-to-peak, high-impedance differential inputs with 1pA leakage current, and a full-scale input range of either 200mV or 2V. The component operates within a commercial temperature range of 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Directly drives common anode LED displays with 8mA segment sinking current
• Integrated internal reference with low temperature drift (80 ppm/°C typical)
• High-impedance differential inputs offering 10^12 Ω impedance and 1pA leakage
• Display hold function allows indefinite retention of the present reading

ADCs/DACs - Special Purpose Applications

• Thermometry systems
• Bridge readouts for strain gauges and load cells
• Digital meters including voltage, current, ohms, and power measurements
• Portable instrumentation powered by 9V batteries

ADCs/DACs - Special Purpose Procurement Notes

Verify that the ordering suffix '713' corresponds to the specific reel packaging configuration required for the assembly process. Confirm that the 'C' designation aligns with the necessary commercial operating temperature range of 0°C to +70°C for the intended environment.

ADCs/DACs - Special Purpose Selection Notes

Select this model when direct LED display driving capability is required without external buffer components. Ensure the application utilizes a dual supply or generates a negative rail, as the TC7117 requires V+ and V- connections unlike single-supply LCD variants. Verify that the 8mA per segment drive current meets the forward current requirements of the target LED display segments.

ADCs/DACs - Special Purpose Part Context

This component belongs to the TC7116/A and TC7117/A family of 3-1/2 digit ADCs. While the TC7116 variant is designed to drive Liquid Crystal Displays (LCDs) with backplane drivers, the TC7117 is specifically engineered for common anode LED displays. Both share identical analog conversion architectures and internal reference specifications.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7117ACLW serves as a functional equivalent in the PLCC-44 package format. For applications requiring improved reference stability, the TC7117A series offers a lower temperature drift of 20 ppm/°C compared to the standard 80 ppm/°C found in the TC7117.