TC7136RCPL

ADCs/DACs - Special Purpose Overview

The TC7136RCPL is a low-power, 3-1/2 digit analog-to-digital converter with an integrated LCD driver. It utilizes a dual-slope integrating architecture to achieve high resolution and precision null detection. The device features a high-impedance differential input with typical leakage current of 1pA and noise performance of 15μV peak-to-peak. It incorporates an internal reference voltage circuit with a temperature drift of 70ppm/°C (typical) for the TC7136 variant. Designed for battery operation, it dissipates approximately 500μW at 9V supply. The RCPL suffix indicates a reverse pin configuration within a 40-pin PDIP package.

ADCs/DACs - Special Purpose Feature Summary

• Dual-slope integrating ADC with auto-zero cycle for offset compensation
• High-impedance differential inputs with 1pA typical leakage current
• Integrated LCD segment and backplane drivers for direct display connection
• Low power dissipation of 500μW (typical) suitable for 9V battery operation

ADCs/DACs - Special Purpose Applications

• Thermometry systems
• Bridge readouts including strain gauges and load cells
• Digital meters for voltage, current, ohms, and pH measurement
• Portable instrumentation requiring low power consumption

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm the reverse pin configuration. Confirm that the component meets the required commercial temperature range specifications. Ensure compatibility with existing PCB layouts due to the distinct pin arrangement compared to standard variants.

ADCs/DACs - Special Purpose Selection Notes

Select this component when a drop-in replacement for legacy TC7126 or ICL7126 designs is required. Choose the TC7136RCPL specifically if the application necessitates a reverse pinout configuration in a 40-pin DIP package. Consider the TC7136A variant if improved internal reference temperature stability is critical for the system accuracy.

ADCs/DACs - Special Purpose Part Context

This part belongs to the Microchip TC7136 family of low-power 3-1/2 digit ADCs. It serves as an upgrade path for older dual-slope converter designs, offering enhanced linearity and lower noise. The device integrates both the analog conversion logic and the digital segment drivers necessary for driving liquid crystal displays directly.

ADCs/DACs - Special Purpose Replacement Considerations

The TC7136 is documented as a drop-in replacement for the TC7126 and ICL7126. Minor changes to external passive components may be required to optimize noise performance or adjust conversion rates.