ISO124U/1KE4

Overview

The ISO124U/1KE4 is a precision isolation amplifier from Texas Instruments utilizing duty-cycle modulation-demodulation. It features a 50-kHz signal bandwidth, ±4.5-V to ±18-V supply range, and 1500 Vrms continuous isolation voltage. The device operates with ±5 mA high-side and ±5.5 mA low-side quiescent currents. Key electrical specifications include a maximum nonlinearity of 0.010%, 140 dB isolation mode rejection at 60 Hz, and an initial input offset voltage of ±50 mV.

Feature Summary

• Transmits signals digitally across a capacitive barrier for high reliability
• Requires no external components for unity gain operation
• Laser trimmed for exceptional circuitry matching

Applications

• Industrial process control transducer isolation
• Thermocouple and RTD isolator circuits
• Ground loop elimination in data acquisition systems

Procurement Notes

Verify the specific package type (SOIC-28) against project requirements. Confirm that the ordering suffix corresponds to the intended reel or tube configuration. Ensure compatibility with existing PCB footprints before finalizing procurement decisions.

Selection Notes

Select this component when galvanic isolation is required for precision analog signals. The fixed unity gain configuration simplifies design compared to programmable alternatives. Consider the 50-kHz bandwidth limit for high-speed applications.

Part Context

This part belongs to the ISO124 family of precision isolation amplifiers. It shares core architecture with variants like the ISO124U but differs in packaging and tape-and-reel specifications. The device integrates both input and output sections within a single plastic package.

Replacement Considerations

ISO124U/1K