Analog Devices Inc. 5B34-10-FC

Overview

5B34-10-FC from Analog Devices is a single-channel isolated linearized RTD input signal conditioner for 2- and 3-wire platinum RTDs (α = 0.00385), delivering 0 V to +5 V output with ±0.32°C accuracy over –100°C to +100°C range, 1500 V_rms isolation, and 4 Hz bandwidth-used in industrial temperature monitoring systems interfacing with PLCs or data acquisition modules.

For engineers reviewing the 5B34-10-FC datasheet, 5B34-10-FC pinout, 5B34-10-FC application, or 5B34-10-FC equivalent, key selection criteria include RTD type support (100 Ω Pt, α = 0.00385), field-side 240 V_rms continuous protection, hot-swap compatibility across 5B Series backplanes, laser-trimmed linearization, and compliance with FM/CSA Class 1 Division 2 and EN50082-1/EN50081-2.

Technical Context

The 5B34-10-FC implements transformer-based galvanic isolation with proprietary modulation/demodulation for linear signal transfer, paired with chopper-stabilized differential amplification (±1 µV/°C drift) and dual-laser-trimmed current sources (0.25 mA per leg) to cancel lead resistance in 3-wire RTD configurations. Its internal multi-pole low-pass filter provides –3 dB cutoff at 4 Hz for optimal 50/60 Hz noise rejection.

Input protection includes 240 V_rms continuous withstand on screw terminals and ANSI/IEEE C37.90.1-1989 transient immunity; output features an active-low enable-controlled series switch (6 µs selection time) and requires output common within ±3 V of power common to maintain integrity.

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 connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADAM-4015 and ISO124, the 5B34-10-FC delivers a complete, certified, field-wirable RTD signal conditioning solution in a standardized hot-swap module-requiring no firmware, external components, or protocol handling, and offering immediate compatibility with 5B Series backplanes.

Availability

5B34-10-FC is available at Aetrix Electronics and suitable for industrial temperature monitoring, PLC analog input conditioning, and process control loop feedback requiring stable component supply, long-term lifecycle support, and hazardous-area certifications.

Supply support for 5B34-10-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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and industrial control.

The 5B Series was engineered specifically for rugged industrial signal conditioning-delivering transformer-isolated, linearized, and protected analog interfaces for RTDs, thermocouples, and voltage/current inputs in hazardous and electrically noisy environments.

FAQ

What RTD types and ranges does the 5B34-10-FC support?

The 5B34-10-FC supports 100 Ω platinum RTDs with temperature coefficient α = 0.00385 over –100°C to +100°C. It is factory-configured for this specific range and RTD type; other variants (e.g., 5B34-02, 5B34-C-01) support different materials or spans. The 5B34-10-FC does not support nickel or copper RTDs or extended ranges without custom calibration.

Does the 5B34-10-FC require external power beyond the +5 V supply?

No-the 5B34-10-FC operates solely from a +5 V ±5% DC supply drawing 30 mA typical. It integrates all necessary excitation, amplification, isolation, and linearization circuitry internally. No auxiliary power rails, external references, or trimming components are needed for standard operation of the 5B34-10-FC.

Can the 5B34-10-FC be used in hazardous locations?

Yes-the 5B34-10-FC is certified by Factory Mutual (FM) and CSA for Class 1, Division 2, Groups A, B, C, and D, meaning it is approved for use where flammable gases may exist only under fault conditions. Its non-incendive design requires no special enclosures when installed per the 5B Series User Manual.

How does the 5B34-10-FC handle 3-wire RTD lead resistance?

The 5B34-10-FC uses two matched 0.25 mA excitation sources: one through the HI–LO path and another through the RETURN terminal. This configuration cancels equal lead resistances in 3-wire RTDs. The RETURN path also connects to a laser-trimmed resistor matching the RTD's base resistance, ensuring zero output at the scale point-fully implemented within the 5B34-10-FC.

Is the 5B34-10-FC compatible with all 5B Series backplanes?

Yes-the 5B34-10-FC shares identical mechanical dimensions, pinout, and electrical interface with all 5B Series modules. It is fully hot-swappable and mix-and-match compatible with backplanes such as the 5B01 and 5B08, allowing seamless integration without modifications to field wiring, power, or mounting infrastructure.