1B51AN

Overview

The Analog Devices Inc. 1B51AN is an isolated millivolt and thermocouple signal conditioner designed for industrial process control applications. It provides high-accuracy signal conditioning with galvanic isolation between input, output, and power supply circuits. The device accepts standard thermocouple inputs or low-level millivolt signals, converting them into a standardized analog output. Key electrical parameters include a wide input range compatible with various thermocouple types, a linear analog output typically ranging from 4 to 20 mA or 0 to 10 V, and operation within a specified temperature range. Isolation voltage ratings ensure safety in noisy environments.

Feature Summary

• Galvanic isolation between input, output, and power supply channels for noise immunity and safety
• Direct compatibility with standard thermocouple types and millivolt sensors without external cold junction compensation
• Linear analog output suitable for direct connection to PLCs, DCS systems, or recorders

Applications

• Industrial process control loops requiring isolated temperature measurement
• Factory automation systems monitoring thermal processes
• Data acquisition systems in electrically noisy environments

Procurement Notes

Verify the specific suffix 'AN' against the manufacturer's current datasheet to confirm pinout configuration, output type, and certification status. Ensure the procurement source provides the official Analog Devices documentation rather than third-party summaries. Confirm that the component meets the required isolation voltage specifications for your application safety standards before finalizing orders.

Selection Notes

Select the 1B51AN when isolated thermocouple conditioning is required with high accuracy. Compare input ranges and output formats against other models in the 1B51 series to match specific sensor types and controller interfaces. Consider environmental temperature ratings and isolation voltage requirements relative to the installation site's electrical noise levels and safety regulations.

Part Context

The 1B51 series represents Analog Devices' line of isolated signal conditioners for industrial instrumentation. These devices are engineered to bridge the gap between field sensors and control systems while maintaining signal integrity. The 1B51AN variant specifically addresses applications needing robust isolation and precise thermocouple signal conversion within compact form factors.

Replacement Considerations

Check for updated revisions of the 1B51 series which may offer improved accuracy or different isolation ratings. Verify pin-to-pin compatibility with existing designs if substituting with other isolated signal conditioners from Analog Devices or competitors.