TC7135CBU713

ADCs/DACs - Special Purpose Overview

The TC7135CBU713 is a 4-1/2 digit dual-slope integrating analog-to-digital converter (ADC) from Microchip Technology. It provides 50 ppm resolution with a maximum nonlinearity error of ±1 count and an auto-zero cycle that reduces zero error to below 10 µV. The device features multiplexed BCD data outputs, TTL-compatible logic, and control signals including BUSY, STROBE, and RUN/HOLD for microprocessor interfacing. Designed for precision applications, it offers low input current (1 pA), true polarity indication at zero, and supports auto-ranging via overrange and underrange signals.

ADCs/DACs - Special Purpose Feature Summary

• 4-1/2 Digit Dual-Slope ADC with 50 ppm resolution
• Multiplexed BCD Data Output with TTL Compatibility
• Low Input Current: 1 pA Maximum
• Auto-Zero Cycle Reduces Zero Error Below 10 µV

ADCs/DACs - Special Purpose Applications

• Precision Analog Signal Processor
• High Accuracy DC Measurements
• Precision Sensor Interface

ADCs/DACs - Special Purpose Procurement Notes

Verify the package type corresponds to the 'BU' suffix in the ordering information, as datasheet pinouts are primarily detailed for PDIP, PLCC, and MQFP packages. Confirm the specific revision level of the component against the latest Microchip documentation to ensure compatibility with design requirements.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring high-resolution DC measurements where low drift and noise immunity are critical. Ensure the external clock frequency is within the specified range (up to 1200 kHz) and that appropriate integrating capacitors with low dielectric absorption are used to maintain accuracy.

ADCs/DACs - Special Purpose Part Context

The TC7135CBU713 belongs to the TC7135 family of dual-slope A/D converters. This series is designed for high-accuracy measurement systems, offering features like auto-ranging and direct interface capabilities with UARTs and microprocessors through its dedicated control pins.

ADCs/DACs - Special Purpose Replacement Considerations

Direct replacements should be sought from the TC7135 family or compatible dual-slope ADCs with similar resolution and pinout configurations. Verify electrical specifications such as supply voltage ranges and output logic levels before substitution.

ADCs/DACs - Special Purpose FAQ

What is the maximum nonlinearity error of the TC7135?

The maximum nonlinearity error is ±1 count.

How does the TC7135 handle polarity indication?

It provides true polarity indication at zero for null detection, with a positive input indicated by a logic high on the POLARITY output.

What is the typical input leakage current?

The input leakage current is typically 1 pA, with a maximum of 10 pA.