Microchip TC7107CKW713: A High-Performance 5-Digit Analog-to-Digital Converter (ADC)

The Microchip TC7107CKW713 stands as a cornerstone in the realm of precision analog-to-digital conversion, specifically engineered for applications demanding high-accuracy numerical display. This integrated circuit is a high-performance, dual-slope integrating ADC that directly drives a 5-digit liquid crystal display (LCD), including the requisite seven-segment decoders, display drivers, reference, and clock all in a single 40-pin package. Its architecture is optimized to deliver exceptional performance in measurement instruments, providing a robust solution where readability and precision are paramount.

A defining characteristic of the TC7107CKW713 is its exceptional noise rejection, a direct benefit of the dual-slope integration method. This technique averages the input signal over a fixed period, inherently cancelling out periodic noise spikes and interference common in industrial environments. This makes the converter supremely suitable for use in digital multimeters, scales, and process control panels where stable and flicker-free readings are critical. The device offers a full-scale input range of ±199.99 mV or ±1.9999 V, selectable through pin strapping, and achieves a resolution of 10 µV in the lower range, underlining its capability for fine measurement detail.

The integration of the complete display driver system is a significant advantage, eliminating the need for external components typically required for decoding and driving the LCD. This not only simplifies board design and reduces the overall bill of materials but also enhances system reliability. The on-chip reference ensures stable conversion accuracy over time and temperature variations. Furthermore, the device features a low-power CMOS construction, making it suitable for both benchtop and portable, battery-operated equipment.

Engineers value the TC7107CKW713 for its ease of implementation and design flexibility. Its straightforward interface allows it to connect directly to a transducer or a conditioned sensor signal. The auto-zero cycle ensures accurate readings even at zero input, and the high input impedance minimizes the loading effect on the sensor circuit. The device's performance is characterized by a maximum conversion rate of approximately 6 readings per second, which is ideal for the vast majority of panel meter applications where ultra-high speed is not a requirement.

ICGOODFIND: The Microchip TC7107CKW713 remains a highly integrated and reliable solution for designers creating high-precision digital readout systems. Its combination of built-in display drivers, outstanding noise immunity, and simplified design architecture secures its position as a go-to component for clear, accurate, and stable 5-digit measurement displays across diverse industrial and commercial applications.

Keywords: Analog-to-Digital Converter (ADC), Dual-Slope Integration, LCD Display Driver, High Noise Rejection, Precision Measurement.