Analog Devices Inc. 5B34-02-CY

Overview

5B34-02-CY from Analog Devices is an isolated linearized RTD input signal conditioner for 2- and 3-wire platinum RTDs, providing 0 V to +5 V output, ±0.13°C accuracy over 0°C to +100°C, 1500 V_rms isolation, and 240 V_rms input protection-used in industrial temperature monitoring systems with hazardous-area compliance.

For engineers reviewing the 5B34-02-CY datasheet, 5B34-02-CY pinout, 5B34-02-CY application, or 5B34-02-CY equivalent, key selection considerations include its fixed 0°C–100°C input range, laser-trimmed linearization for Pt-100 (α = 0.00385), chopper-stabilized <1 µV/°C drift, 4 Hz bandwidth, and hot-swappable 5B-series mechanical compatibility.

Technical Context

The 5B34-02-CY implements transformer-coupled isolation with proprietary modulation for stable linear signal transfer, using dual matched current sources (0.25 mA) to cancel lead resistance in 3-wire RTDs and laser-trimmed feedback linearization for Pt-100 conformity error ≤±0.05% span.

Its differential chopper-stabilized amplifier delivers ±0.02°C/°C input offset drift and ±20 µV/°C output offset drift, while internal multi-pole low-pass filtering achieves 160 dB CMR at 50/60 Hz and 4 Hz –3 dB bandwidth-optimized for noisy industrial environments where high common-mode rejection and low self-heating (<0.25 mA excitation) are critical.

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 isolated RTD signal conditioning applications.

Compared with 5B34-02 and ADAM-4017+, the 5B34-02-CY uniquely combines factory-certified hazardous-area approval, analog 0–5 V output, hot-swap capability, and transformer-based isolation-making it optimal for safety-critical, analog-centric control systems where certification and mechanical interoperability are non-negotiable.

Availability

5B34-02-CY is available at Aetrix Electronics and suitable for industrial temperature monitoring, hazardous-area sensor interfacing, and PLC analog input conditioning requiring stable component supply and long-term lifecycle support.

Supply support for 5B34-02-CY 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 was designed specifically for rugged industrial signal conditioning-delivering transformer-isolated, linearized, and protected analog interfaces for RTDs, thermocouples, and voltage/current signals in hazardous and electrically noisy environments.

FAQ

What is the exact RTD type and alpha coefficient supported by the 5B34-02-CY?

The 5B34-02-CY is configured for 100 Ω platinum RTDs with α = 0.00385, covering the 0°C to +100°C range. It does not support other RTD types (e.g., Ni or Cu) or alternate alpha values (e.g., 0.003916) unless custom-trimmed. The "-02" suffix explicitly denotes this Pt-100/0.00385 calibration, and the "CY" suffix confirms CSA/FM certification for that configuration.

Does the 5B34-02-CY require external power supply regulation?

No-the 5B34-02-CY operates from a nominal +5 V dc supply with ±5% tolerance and includes internal regulation. Its power supply sensitivity is specified as ±0.05°C/V for Pt RTDs, meaning output error remains within specification across the full supply range. No external regulator is needed, simplifying system-level power design.

Can the 5B34-02-CY be used with 4-wire RTDs?

No-the 5B34-02-CY supports only 2- and 3-wire RTD configurations. True 4-wire RTD measurements require the dedicated 5B35 model, which provides separate force-and-sense paths. Using a 4-wire RTD with the 5B34-02-CY will result in inaccurate readings due to uncancelled lead resistance and improper excitation routing.

What is the maximum continuous common-mode voltage the 5B34-02-CY can withstand?

The 5B34-02-CY withstands 1500 V_rms continuous common-mode voltage between input and output circuits. This rating is verified per ANSI/IEEE C37.90.1-1989 transient standards and enables safe operation in high-noise plant environments where ground potential differences exceed hundreds of volts.

Is the 5B34-02-CY compatible with all 5B-series backplanes?

Yes-the 5B34-02-CY shares identical mechanical dimensions, pinout, and hot-swap logic with all standard 5B-series modules. It mates seamlessly with 5B01, 5B08, and other FM/CSA-approved backplanes, and requires no firmware or configuration changes when inserted or replaced in-service.