ISO122JU

Overview

The ISO122JU is a precision isolation amplifier manufactured by Texas Instruments, designed for high-accuracy analog signal transmission across electrical barriers. It features a single channel with a 50 kHz bandwidth and utilizes capacitive isolation technology to provide galvanic separation. The device operates on a dual power supply ranging from -18 V to +18 V and supports an input offset voltage of 20 mV. It offers a common-mode rejection ratio of 140 dB and a gain error of 0.02%. Packaged in an 8-pin SOIC surface-mount format, it functions within a temperature range of -25°C to +85°C.

Feature Summary

• Provides precise amplification of analog signals while maintaining galvanic isolation between input and output circuits.
• Utilizes capacitive isolation architecture to ensure robust signal integrity and high common-mode rejection.
• Delivers low gain error and low input offset voltage for accurate measurement applications.

Applications

• Industrial process control systems requiring isolated sensor signal conditioning
• Medical equipment needing patient isolation and safety compliance
• Test and measurement instruments demanding high accuracy across isolation barriers

Procurement Notes

Verify the specific suffix 'JU' against the official Texas Instruments datasheet to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the SOIC-8 package. Confirm that the required isolation voltage ratings meet system safety standards before procurement.

Selection Notes

Select this component when a single-channel precision isolation amplifier is required with a 50 kHz bandwidth. Consider the -25°C to +85°C operating range for industrial environments. Evaluate the need for dual-supply operation (-18 V to +18 V) versus single-supply alternatives if power constraints exist.

Part Context

The ISO122 belongs to the ISO12x family of precision isolation amplifiers from Texas Instruments. This series is engineered to replace traditional transformer-based isolators, offering lower cost and smaller form factors. The ISO122 specifically targets applications requiring high DC accuracy and low drift over time.

Replacement Considerations

Consult the TI ISO122 datasheet for direct pin-compatible replacements or upgraded variants within the ISO12x family. Verify functional equivalence regarding isolation voltage and bandwidth before substituting.