TC7106ACPL

ADCs/DACs - Special Purpose Overview

The TC7106ACPL is a 3-1/2 digit dual-slope integrating Analog-to-Digital Converter (ADC) manufactured by Microchip Technology. It features an internal precision voltage reference with a typical temperature coefficient of 20 ppm/°C, offering significant stability improvements over standard variants. The device operates on a single 9V supply and consumes approximately 10 mW of power, making it suitable for battery-powered portable instrumentation. It provides high-impedance CMOS differential inputs with 1 pA leakage current and includes an auto-zero cycle to eliminate offset errors. The component drives LCD displays directly via segment drivers and supports ratiometric measurements through differential reference inputs.

ADCs/DACs - Special Purpose Feature Summary

• Internal low-drift reference: 20 ppm/°C typical temperature coefficient
• Direct LCD drive capability with integrated backplane driver
• High-impedance differential inputs: 10^12 Ω impedance, 1 pA leakage
• Auto-zero cycle ensures zero reading at zero input without external adjustment

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type matches the application requirements, as the TC7106 series is available in PDIP-40, PLCC-44, and MQFP-44 configurations. Ensure the specific suffix corresponds to the desired package style. Confirm that the commercial temperature range (0°C to +70°C) aligns with the operational environment. Check for moisture sensitivity levels if surface mount variants are considered, though this specific part number indicates a through-hole package.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7106ACPL when upgrading existing TC7106 systems to benefit from the lower drift internal reference without changing external passive components. Use this device for applications requiring stable DC measurements where low noise and high input impedance are critical. Ensure the clock frequency is set to 48 kHz for optimal performance with the recommended capacitor values. Verify that the display interface matches the LCD segment configuration supported by the internal drivers.

ADCs/DACs - Special Purpose Part Context

The TC7106ACPL 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 the standard TC7106, providing enhanced thermal stability due to its improved internal reference. The 'C' suffix denotes the commercial temperature range, while 'PL' indicates the 44-pin Plastic Leaded Crystal Carrier (PLCC) package variant, although datasheet tables may list PDIP options for similar suffixes.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7106A is a direct upgrade for the TC7106 with no external component changes required. For LED display applications, consider the TC7107A, which shares the same ADC architecture but includes higher current segment drivers. Cross-reference with TC7106ACKW or TC7106ACLW if different package styles such as MQFP or PLCC are needed.