TC7107CPL

ADCs/DACs - Special Purpose Overview

The TC7107CPL is a 3-1/2 digit direct display drive Analog-to-Digital Converter manufactured by Microchip Technology. It features a dual-slope conversion architecture with high-impedance CMOS differential inputs offering 10^12 Ω impedance and 1 pA leakage current. The device includes an internal reference with low temperature drift (80 ppm/°C typical) and drives common anode LED displays directly with 8 mA per segment. Key electrical specifications include a maximum supply current of 1.8 mA, operation at 5 V, and a power dissipation rating of 1.23 W in the 40-pin PDIP package.

ADCs/DACs - Special Purpose Feature Summary

• Directly drives common anode LED displays with 8 mA segment sinking current
• High-impedance differential inputs with 10^12 Ω impedance and 1 pA leakage
• Internal reference with 80 ppm/°C typical temperature drift
• Auto-zero cycle eliminates need for external zero adjustment

ADCs/DACs - Special Purpose Applications

• Thermometry
• Bridge readouts including strain gauges and load cells
• Digital meters for voltage, current, ohms, and power
• Portable instrumentation with 9V battery operation

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix 'CPL' corresponds to the 40-pin PDIP package and commercial temperature range (0°C to +70°C). Confirm that the component matches the TC7107 series specifications rather than the upgraded TC7107A variant, as performance parameters such as linearity error and reference drift differ between these sub-models.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring direct LED driving without external buffer transistors. Ensure the clock frequency is set to 48 kHz for 3 conversions per second using the recommended RC network. Verify that the integrating capacitor has low dielectric absorption to minimize rollover error, and confirm that the input signal remains within the common mode range relative to the positive supply.

ADCs/DACs - Special Purpose Part Context

The TC7107CPL belongs to the TC7106/A/TC7107/A family of 3-1/2 digit ADCs. It serves as a drop-in replacement for legacy TC7107 parts, allowing system upgrades without changing external passive component values. Unlike the TC7107A, the standard TC7107 utilizes a less precise internal reference and exhibits higher linearity error limits.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.