TC7117ACKW713

ADCs/DACs - Special Purpose Overview

The TC7117ACKW713 is a 3-1/2 digit CMOS Analog-to-Digital Converter (ADC) from Microchip Technology, featuring an integrated internal reference with low temperature drift of 20 ppm/°C. It provides 0.05% resolution and directly drives common anode LED displays with an 8mA segment drive current per segment. The device includes seven-segment decoders, polarity drivers, and a display hold function. Key electrical characteristics include a 15µV peak-to-peak noise level, 1pA typical input leakage current, and high-impedance differential inputs with 10^12Ω impedance. It operates on ±5V supplies or single +5V configurations.

ADCs/DACs - Special Purpose Feature Summary

• Integrated Low Drift Internal Reference: 20 ppm/°C typical for TC7117A series.
• Direct LED Drive Capability: Sinks 8mA per segment for common anode displays.
• Display Hold Function: Maintains reading indefinitely while HLDR is held high.
• High Input Impedance: 10^12Ω input impedance with 1pA typical leakage current.

ADCs/DACs - Special Purpose Applications

• Thermometry systems
• Bridge readouts for strain gauges and load cells
• Digital meters for voltage, current, ohms, and power
• Portable instrumentation

ADCs/DACs - Special Purpose Procurement Notes

Verify the package code 'KW' corresponds to the 44-Pin PQFP variant with a commercial temperature range of 0°C to +70°C. Confirm that the suffix '713' indicates tape and reel packaging as specified by the manufacturer's ordering information. Ensure compatibility with standard surface-mount assembly processes for PQFP packages.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7117ACKW713 when direct LED driving is required, as opposed to LCD applications which use the TC7116A series. Choose this part over the non-'A' variant if lower internal reference temperature drift (20 ppm/°C vs 80 ppm/°C) is necessary for precision measurements. Ensure the application supports the 44-pin PQFP footprint and the specific thermal dissipation requirements of LED segment currents.

ADCs/DACs - Special Purpose Part Context

This component belongs to the TC7116/A and TC7117/A family of 3-1/2 digit ADCs. The TC7117A variant is specifically designed for LED displays, whereas the TC7116A drives LCDs. The 'A' designation signifies improved internal reference stability compared to the base TC7117 model. The KW package code identifies the 44-pin Plastic Quad Flat Package (PQFP).

ADCs/DACs - Special Purpose Replacement Considerations

Functionally equivalent parts include the TC7117ACPL (PDIP package) and TC7117ACLW (PLCC package) for pin-compatible replacements in different form factors. Cross-referencing with other 3.5-digit dual-slope ADCs requires verifying LED drive current capabilities and pinout compatibility.