TC7136ARCPL

ADCs/DACs - Special Purpose Overview

The TC7136ARCPL is a low power, 3-1/2 digit analog-to-digital converter with LCD drivers manufactured by Microchip Technology. It features a dual-slope conversion architecture with an internal reference voltage exhibiting a typical temperature drift of 35ppm/°C. The device provides high resolution (0.05%), low noise (15µV P-P), and high input impedance (10^12Ω) with 1pA leakage current. It operates on a single 9V supply with typical power dissipation of 500µW. The component is housed in a 40-pin PDIP package and supports a commercial operating temperature range of 0°C to +70°C.

ADCs/DACs - Special Purpose Feature Summary

• Internal zener reference with improved temperature stability (35ppm/°C typical for TC7136A)
• High-impedance differential inputs with 1pA typical leakage current
• Low power consumption suitable for 9V battery operation (500µW typical)
• Integrated LCD segment and backplane drivers for direct display connection

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm that the reverse pin configuration variant matches the target PCB layout requirements. Ensure compatibility with existing passive component values if upgrading from TC7126 or ICL7126 designs. Check for moisture sensitivity handling requirements during storage and assembly.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7136ARCPL when a drop-in replacement for TC7126 systems is required with improved reference stability. Choose this model over the standard TC7136 if lower temperature drift is critical. Ensure the application utilizes a 40-pin PDIP footprint. Verify that the external clock frequency and capacitor values align with the desired conversion rate and integrator swing specifications.

ADCs/DACs - Special Purpose Part Context

This part belongs to the TC7136/TC7136A family of 3-1/2 digit ADCs. It serves as an enhanced version of the TC7126, offering better internal reference performance without requiring external reference sources. The 'R' suffix indicates a reverse pin configuration compared to the standard 'C' variant, while 'A' denotes the improved temperature coefficient reference.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitutes include the TC7126 and ICL7126, though minor component value changes may be necessary for optimal performance. The TC7136 (non-A) is also compatible but offers higher reference drift (70ppm/°C). No other specific cross-model replacements are documented.