ISO122JUG4

Overview

The ISO122JUG4 is a precision, low-cost isolation amplifier from the Texas Instruments ISO122 family. It features a single channel with capacitive and galvanic isolation technology. Key electrical specifications include a 50 kHz 3dB bandwidth, 140 dB common-mode rejection ratio (CMRR), and an input offset voltage of 20 mV. The device operates on supply voltages ranging from 4.5 V to 18 V, with a maximum power supply voltage of 18 V. It draws 5.5 mA of operating current and offers a gain error of 0.02%. The component provides 1500 Vrms isolation voltage and functions within a temperature range of -25°C to +85°C. It is housed in an 8-SOIC surface-mount package.

Feature Summary

• Integrates capacitive and galvanic isolation for high-voltage signal transmission
• Provides high-precision amplification with low gain error and offset voltage
• Features wide common-mode rejection capability for noise immunity

Applications

• Industrial process control systems requiring isolated signal conditioning
• Battery monitoring applications in electric vehicles or energy storage
• Programmable gain amplifier circuits in measurement instrumentation
• Thermocouple amplifier interfaces for temperature sensing
• Isolated 4-20 mA loop transmitters

Procurement Notes

Verify the specific suffix JG against the manufacturer's official documentation to confirm the package type and temperature grade. Ensure compatibility with existing PCB footprints for the 8-SOIC form factor. Confirm that the required isolation voltage and bandwidth meet the system design specifications before procurement.

Selection Notes

Select this component when a single-channel isolation amplifier with high CMRR and low cost is required. It is suitable for applications needing precise signal transfer across isolation barriers without digital conversion. Consider the 50 kHz bandwidth limit for high-speed applications. Evaluate the 8-SOIC package constraints for board space and thermal management requirements.

Part Context

The ISO122JUG4 belongs to the ISO122 series of isolation amplifiers by Texas Instruments. This series is designed to provide accurate analog signal isolation in noisy industrial environments. The device replaces traditional transformer-based isolators with a more compact and cost-effective solution using capacitive coupling technology.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's official replacement guide for verified alternatives.