ISO102

Overview

The ISO102 is a hermetic isolation buffer amplifier manufactured by Texas Instruments (originally Burr-Brown). It features a 24-pin ceramic DIP package with a rated continuous isolation voltage of 1500Vrms. The device provides a wide input range of ±10V and a small signal bandwidth of 70kHz. It operates on dual supplies ranging from ±10V to ±20V, with typical quiescent currents of 15mA for the input stage and 33mA for the output stage. The unit includes internal +5V references and supports optional gain and offset adjustments.

Feature Summary

• Hermetically sealed hybrid construction utilizing high-voltage ceramic capacitors for robust signal coupling
• Digital encoding mechanism ensures accurate analog signal duplication without galvanic connection between stages
• Integrated low-drift +5V voltage references facilitate bipolar offset setting and input signal conditioning

Applications

• Transducer channel isolation for thermocouples, RTDs, pressure bridges, and flow meters
• 4mA to 20mA loop isolation in industrial process control systems
• Motor and SCR control circuits requiring fault protection
• Ground loop elimination in biomedical and analytical measurement equipment

Procurement Notes

Verify component authenticity through authorized distributors or certified secondary market suppliers due to discontinued status. Confirm package integrity and pin configuration match the 24-pin ceramic specification. Review datasheet revisions for any updates regarding absolute maximum ratings and thermal resistance parameters before integration into final designs.

Selection Notes

Select this model when high-level analog signals within the ±10V range require isolation. Ensure supply voltages remain within the ±10V to ±20V operational window. Consider the ISO106 variant if higher isolation ratings are necessary. Verify that the 70kHz bandwidth meets system requirements, as external capacitors can reduce this value for improved noise performance.

Part Context

This component belongs to the ISO102/ISO106 series of capacitive coupled isolation products originally developed by Burr-Brown. These devices utilize a three-chip hybrid design integrated into side-brazed DIP packages. The series is characterized by its industry-standard dimensions with missing pins between input and output stages to facilitate automatic insertion techniques during production assembly.

Replacement Considerations

No direct public substitute part numbers are confirmed in the provided documentation.