TC514COI

Overview

The TC514COI is a precision analog front end featuring a dual-slope ADC with a maximum resolution of 17 bits plus sign. It integrates an integrator, zero-crossing comparator, and processor interface logic. The device includes an onboard negative power supply converter for single-supply operation and a 4-input differential analog multiplexer. Power dissipation is specified at 18 mW. Control is managed via a three-wire processor interface (inputs A and B, and CMPTR output) to sequence auto-zero, integrate, de-integrate, and integrator zero phases.

Feature Summary

• Dual-slope ADC with up to 17-bit resolution
• Integrated 4-input differential analog multiplexer
• Onboard negative power supply converter for single-supply use
• Low power dissipation of 18 mW

Applications

• Precision measurement systems requiring high-resolution analog-to-digital conversion
• Applications necessitating single-supply operation with multiple differential inputs
• Data acquisition systems utilizing microprocessor-controlled integration cycles

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and temperature range. Ensure compatibility with the required analog input voltage range and reference voltages for the intended application design.

Selection Notes

Select this component when a 4-channel differential multiplexer and single-supply capability are required within a dual-slope architecture. Compare against the TC510 if multiplexing is unnecessary, or the TC500A if dual supplies are available and lower power consumption is prioritized.

Part Context

The TC514COI belongs to the TC500/A/510/514 family of precision analog front ends. This family shares a common processor control interface and conversion phase structure, differing primarily in power supply requirements and integrated peripheral features like multiplexers.

Replacement Considerations

Direct functional substitutes within the same family include the TC510COI, which lacks the integrated multiplexer but offers similar conversion characteristics. Verify pinout compatibility and software interface alignment when considering these alternatives.