TC7106CPL

ADCs/DACs - Special Purpose Overview

The TC7106CPL is a 3-1/2 digit dual-slope Analog-to-Digital Converter (ADC) manufactured by Microchip Technology in a 40-pin PDIP package. It features an internal precision reference with a typical temperature drift of 80 ppm/°C and high-impedance CMOS differential inputs offering 10^12 Ω impedance and 1 pA leakage current. The device operates on a single supply, supporting convenient 9V battery operation for low-power portable applications. Key electrical specifications include a peak-to-peak noise performance of 15 µV at 200 mV full scale, a linearity error of less than 1 count, and a conversion rate of 3 readings per second when driven by a 48 kHz clock.

ADCs/DACs - Special Purpose Feature Summary

• Directly drives LCD displays without external drivers
• Internal auto-zero cycle eliminates offset voltage errors
• High-impedance differential inputs simplify ratiometric measurements
• Low power consumption suitable for 9V battery operation

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type matches the design requirements, as the TC7106 series is available in multiple formats including PDIP, PLCC, and MQFP. Confirm the specific suffix indicates the commercial temperature range variant intended for the application environment. Ensure ordering documentation aligns with the 40-pin through-hole configuration specified for this part number.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7106CPL for applications requiring direct LCD interfacing and low component count designs. This variant is appropriate for systems operating within the commercial temperature range of 0°C to +70°C. For industrial environments requiring operation between -25°C and +85°C, the TC7106IKW or similar industrial grade variants should be considered instead.

ADCs/DACs - Special Purpose Part Context

The TC7106CPL belongs to the TC7106/A family of 3-1/2 digit ADCs designed for direct display driving. It serves as a drop-in replacement for earlier generations like the TC7106, offering improved linearity and reduced rollover error while maintaining compatibility with existing passive component values. The CPL suffix specifically denotes the 40-pin plastic dual in-line package.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7106CPL is functionally compatible with the standard TC7106. For upgraded performance with lower reference drift (20 ppm/°C), consider the TC7106ACPL. Ensure that any replacement maintains the same 40-pin PDIP footprint if board space is constrained.