TLC7135CDWR

Overview

The TLC7135CDWR is a 4½-digit analog-to-digital converter manufactured by Texas Instruments in an SOIC-28 package. It operates on a single supply voltage ranging from 4V to 6V with a typical supply current of 1 mA and power dissipation of 5 mW. The device functions within a temperature range of 0°C to 70°C. Key electrical specifications include a resolution of 50 ppm, zero error less than 10 μV, and input bias current below 10 pA.

Feature Summary

• Provides true differential input capability for enhanced noise rejection
• Outputs data in multiplexed BCD format compatible with display devices
• Features automatic range adjustment with overrange and underrange indicators
• Ensures high accuracy with low flip error limited to ±1 count

Applications

• Microprocessor-based data acquisition systems
• Remote monitoring and telemetry interfaces
• Direct LED or LCD display driver circuits

Procurement Notes

Verify the specific suffix 'DWR' confirms the SOIC-28 surface mount package and commercial temperature grade. Confirm active status through official Texas Instruments channels. Ensure compatibility with required logic levels and power supply constraints before finalizing procurement orders.

Selection Notes

Select this component when high precision is required for DC measurements interfacing directly with displays. The CMOS technology ensures low power consumption suitable for battery-operated instruments. Verify that the system supports the necessary control signals such as BUSY and STROBE for proper microprocessor integration.

Part Context

This part belongs to the TLC7135 family of dual-slope integrating ADCs. It is designed specifically for applications requiring high resolution and direct interface capabilities without external decoding logic. The device represents a standard solution for precision measurement tasks in industrial and consumer electronics.

Replacement Considerations

Compatible substitutes include TSC7135, ICL7135, and Si7135. Verify pinout and electrical characteristics match before substitution.

FAQ

Does the TLC7135CDWR support auto-ranging?

Yes, it features automatic range adjustment with overrange and underrange signal outputs.

What is the maximum flip error for this ADC?

The maximum flip error is limited to ±1 count.