TC7116CLW

ADCs/DACs - Special Purpose Overview

The TC7116CLW is a 3-1/2 digit CMOS Analog-to-Digital Converter (ADC) manufactured by Microchip Technology. It integrates seven-segment decoders, polarity and digit drivers, a voltage reference, and clock circuitry to construct a measurement system with 0.05% resolution. The device features a display hold function, directly drives LCD displays via an integrated backplane driver, and operates on a single 9V supply. Key electrical specifications include a typical internal reference temperature drift of 80 ppm/°C, 15µV peak-to-peak noise, and high-impedance differential inputs with 1pA leakage current. It is housed in a 44-pin PLCC package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated LCD Backplane Driver for direct display connection
• Display Hold Function (HLDR) to freeze readings while conversions continue
• Auto-Zero Cycle eliminates the need for external zero adjustment potentiometers
• High-Impedance Differential Inputs with 10^12 Ω impedance and 1pA leakage

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix CLW corresponds to the 44-pin PLCC package and commercial temperature range (0°C to +70°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributors prior to ordering. Ensure design accounts for humidity sensitivity requirements associated with this plastic leaded chip carrier package type.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7116CLW for applications requiring LCD output and battery operation. Note that the 'C' suffix indicates a commercial temperature range; use the 'I' suffix variant if operation below 0°C is required. This model lacks LED drive capability; choose the TC7117 series for common anode LED displays. Verify full-scale input range requirements (200mV or 2V) against external component selections.

ADCs/DACs - Special Purpose Part Context

The TC7116CLW belongs to the TC7116/A family of 3-1/2 digit ADCs. It is functionally identical to the TC7116 but distinguished by its 44-pin PLCC surface-mount package and commercial temperature rating. It shares architecture with the TC7117 (LED driver) and TC7116A (low-drift reference), offering a cost-effective solution for standard precision measurement tasks.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7116CKW serves as a pin-compatible replacement within the same package family but utilizes a PQFP form factor instead of PLCC. For low-temperature environments, the TC7116IJL provides equivalent functionality in a 40-pin CERDIP package with an extended industrial temperature range.