Analog Devices Inc. 5B37-R-14-FC

Overview

5B37-R-14-FC from Analog Devices is a single-channel isolated thermocouple input signal conditioner for Type R thermocouples, delivering 0 to +5 V isolated output with ±0.05% span accuracy, 1500 V_rms input-to-output isolation, and 4 Hz bandwidth filtering. It performs cold-junction compensation (±0.25°C @ +25°C), chopper-stabilized amplification (±1 µV/°C input offset drift), and withstands 240 V_rms continuous input overvoltage-used in industrial temperature monitoring systems requiring intrinsic safety in Class 1, Division 2 hazardous locations.

For engineers reviewing the 5B37-R-14-FC datasheet, 5B37-R-14-FC pinout, 5B37-R-14-FC application, or 5B37-R-14-FC equivalent, key selection criteria include thermocouple type support (R), input protection rating (240 V_rms), cold-junction compensation accuracy, transformer-based isolation integrity, and compatibility with FM/CSA-certified 5B-series backplanes.

Technical Context

The 5B37-R-14-FC implements transformer-coupled galvanic isolation with proprietary modulation for linear signal recovery, featuring a fully floating differential field-side input that eliminates grounding requirements. Its chopper-stabilized amplifier ensures low-drift gain (±0.0025%/°C) and stable zero-scale offset (laser-trimmed).

Internal multi-pole low-pass filtering provides 4 Hz –3 dB bandwidth, delivering 60 dB normal-mode rejection at 60 Hz and 160 dB common-mode rejection with 1 kΩ source imbalance-enabling high-fidelity measurement of microvolt-level thermocouple signals in electrically noisy industrial environments.

Key Specifications

Pinout & Package

Package: 2.275" × 2.375" × 0.595" (57.8 mm × 59.1 mm × 15.1 mm) potted module with standardized 5B-series footprint and screw-terminal field interface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar thermocouple signal conditioning applications.

Compared with ADAM-4018-R and ISO124P, the 5B37-R-14-FC delivers certified transformer isolation, factory-calibrated cold-junction compensation, and plug-and-play compatibility with 5B-series backplanes-reducing validation effort and eliminating layout-dependent performance variation in industrial control cabinets.

Availability

5B37-R-14-FC is available at Aetrix Electronics and suitable for industrial temperature monitoring, furnace control, refinery safety systems, and power plant boiler supervision requiring stable component supply, FM/CSA certification, and long-term obsolescence management.

Supply support for 5B37-R-14-FC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and industrial control.

The 5B Series-of which 5B37-R-14-FC is a member-is designed specifically for rugged, safety-certified industrial signal conditioning, combining transformer isolation, cold-junction compensation, and modular hot-swap capability in standardized potted modules.

FAQ

What thermocouple types does the 5B37-R-14-FC support?

The 5B37-R-14-FC is configured exclusively for Type R thermocouples, covering 0°C to +1750°C. Unlike generic 5B37 models, this variant is factory-set for R-type input range and cold-junction compensation curve. It does not support J, K, T, or other thermocouple types without hardware modification or reconfiguration-which is not supported. The 5B37-R-14-FC maintains ±0.25°C CJC accuracy at +25°C ambient and meets all specifications listed in Rev. 0 datasheet for R-type operation.

Does the 5B37-R-14-FC require an external cold-junction sensor?

No-the 5B37-R-14-FC integrates internal cold-junction compensation using the AC1361 sensor mounted on compatible 5B-series backplanes. When installed in an FM/CSA-certified 5B backplane (e.g., 5B37-R-14-FC must be used with backplanes containing the AC1361), it achieves ±0.25°C initial CJC accuracy at +25°C. No external sensor or wiring is needed, and the module automatically corrects for parasitic thermocouple errors at its screw terminals.

What is the meaning of "-14-FC" in the 5B37-R-14-FC part number?

The suffix "-14-FC" denotes a specific configuration within the 5B37-R family: "-14" indicates the model is calibrated for the standard Type R input range (0°C to +1750°C) and 0 V to +5 V output, while "-FC" signifies Factory Calibrated with full traceable metrology documentation per ISO/IEC 17025. This distinguishes it from non-calibrated or custom-range variants and confirms compliance with Analog Devices' published accuracy specs including ±0.05% span error and ±1 µV/°C input offset drift.

Can the 5B37-R-14-FC be hot-swapped in live systems?

Yes-the 5B37-R-14-FC is fully hot-swappable in any certified 5B-series backplane (e.g., 5B01, 5B08). Its design allows insertion or removal without interrupting field wiring, system power, or adjacent modules. This is enabled by its floating input architecture, controlled enable sequencing, and robust 240 V_rms input protection. Field technicians can replace a failed 5B37-R-14-FC unit during operation-critical for minimizing downtime in continuous-process industries like petrochemicals and power generation.

What safety certifications apply to the 5B37-R-14-FC?

The 5B37-R-14-FC carries Factory Mutual (FM) approval for Class 1, Division 2, Groups A, B, C, and D hazardous locations and CSA certification for identical classification. These approvals confirm its nonincendive operation-meaning it cannot ignite flammable gases under fault conditions. It also complies with EN50082-1 and EN50081-2 for industrial EMC immunity and emissions, and meets ANSI/IEEE C37.90.1 for surge withstand. All certifications apply to the module itself when used per Analog Devices' installation guidelines.