TC7136ACPL

ADCs/DACs - Special Purpose Overview

The TC7136ACPL is a low power, 3-1/2 digit analog-to-digital converter with an integrated LCD driver. It operates on a single 9V supply with typical power dissipation of 500μW. The device features a dual-slope conversion architecture with an internal reference voltage having a temperature drift of 35ppm/°C (typical). Key electrical specifications include a noise level of 15μVP-P, high input impedance of 10^12Ω, and linearity error less than 1 count. It provides direct drive for 7-segment displays and includes precision null detectors.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 3-1/2 digit LCD driver with backplane generation
• Internal zener reference with 35ppm/°C temperature drift
• High input impedance: 1pA leakage current, 10^12Ω resistance
• Low noise performance: 15μVP-P

ADCs/DACs - Special Purpose Applications

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

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type matches the required PCB footprint, as this model uses a 40-pin PDIP. Confirm the suffix 'ACPL' corresponds to the commercial temperature range (0°C to +70°C) and standard pin configuration. Check for obsolete status or lifecycle notices from the manufacturer before finalizing procurement plans.

ADCs/DACs - Special Purpose Selection Notes

Select the TC7136ACPL for applications requiring low power consumption and direct LCD interfacing without external drivers. Ensure the full-scale input range matches the external reference voltage setup (e.g., 200mV or 2V). Verify that the operating environment stays within the 0°C to +70°C commercial temperature range specified for the 'C' variant.

ADCs/DACs - Special Purpose Part Context

This component belongs to the TC7136 family of integrating ADCs. It serves as a drop-in replacement for older models like the TC7126 and ICL7126, offering improved noise performance and lower power dissipation. The 'A' designation indicates the enhanced internal reference with lower temperature drift compared to the base TC7136.

ADCs/DACs - Special Purpose Replacement Considerations

The datasheet identifies the TC7136 and TC7136A as drop-in replacements for the TC7126 and ICL7126. Minor changes to external passive components may be necessary to upgrade existing designs.