ISO1212DBQR

Overview

The ISO1212DBQR is a dual-channel digital isolator manufactured by Texas Instruments, designed specifically for isolated 24-V to 60-V digital input modules. It features a 16-lead SSOP package with a width of 3.90 mm. The device provides functional isolation with a rating of 2500 Vrms and supports data rates up to 4 Mbps. It exhibits a common-mode transient immunity (CMTI) of 25 kV/µs. The operating temperature range spans from -40°C to +125°C. Power supply voltage ranges from 1.71 V to 5.5 V.

Feature Summary

• Provides galvanic isolation between low-voltage logic circuits and high-voltage industrial inputs.
• Offers robust signal integrity with high common-mode transient immunity ratings.
• Designed for compact integration into digital input module architectures.

Applications

• Isolated digital input receivers for industrial automation systems
• PLC input interface circuits requiring 24-V to 60-V tolerance
• Safety-critical control systems needing reinforced or basic isolation barriers

Procurement Notes

Verify the specific suffix 'DBQR' corresponds to the SSOP-16 package and tape-and-reel shipping configuration. Confirm that the required isolation voltage class meets the safety standards of the target application. Ensure the CMTI specification aligns with the noise environment of the high-voltage side. Check RoHS compliance status if restricted substances are a concern for the manufacturing process.

Selection Notes

Select this component when interfacing microcontrollers with 24-V to 60-V digital signals in space-constrained designs. The SSOP-16 package offers a smaller footprint compared to wider SOIC options. Consider the 4 Mbps data rate limit for high-speed applications; higher speeds may require alternative series. Evaluate the 25 kV/µs CMTI against potential switching transients in the industrial environment to ensure reliable operation without false triggering.

Part Context

This part belongs to the ISO121x family of isolated digital input receivers. These devices are engineered to bridge the gap between low-voltage processing units and harsh industrial environments. The family focuses on simplifying design-in by integrating isolation directly into the input receiver function, reducing component count and board space compared to discrete solutions.

FAQ

What is the maximum data rate supported by the ISO1212DBQR?

The device supports a maximum data rate of 4 Mbps.

Does the ISO1212DBQR include a shutdown pin?

No, the datasheet indicates no shutdown functionality is available for this specific model.