Analog Devices Inc. 5B35-N-01

Overview

5B35-N-01 from Analog Devices is a single-channel isolated linearized 4-wire RTD input signal conditioner for nickel (120 Ω, α = 0.00672) sensors, delivering 0 V to +5 V output with ±0.40°C accuracy over 0°C to +300°C, 1500 V_rms input-output isolation, and 4 Hz bandwidth. It performs excitation, amplification, filtering, and linearization in industrial measurement systems.

For engineers reviewing the 5B35-N-01 datasheet, 5B35-N-01 pinout, 5B35-N-01 application, or 5B35-N-01 equivalent, key selection factors include its 120 Ω nickel RTD support, true three-port isolation, chopper-stabilized low-drift amplification (+0.01°C/°C offset drift), 240 V_rms input protection, and hot-swappable 5B Series compatibility.

Technical Context

The 5B35-N-01 uses transformer-coupled true three-port isolation (input/output/power), with proprietary modulation/demodulation for linear signal recovery. Its chopper-stabilized differential amplifier enables low-excitation-current operation (0.25 mA) to minimize RTD self-heating error.

It integrates a five-pole Butterworth filter (4 Hz –3 dB bandwidth), achieving 116 dB normal-mode rejection at 60 Hz and delivering 100 µV_rms output noise in 100 kHz bandwidth. Input protection withstands 240 V_rms continuously and meets ANSI/IEEE C37.90.1-1989 transient standards.

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-side interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 5B35-01 and 5B35-04, the 5B35-N-01 uniquely supports 120 Ω nickel RTDs up to +300°C with balanced accuracy and isolation-making it optimal for mid-range industrial processes where nickel's positive α and cost advantage outweigh platinum's extended range.

Availability

5B35-N-01 is available at Aetrix Electronics and suitable for industrial temperature monitoring, hazardous area signal conditioning, and high-accuracy process control requiring stable component supply, long-lifecycle availability, and certified isolation performance.

Supply support for 5B35-N-01 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 designed specifically for rugged industrial signal conditioning-delivering transformer-isolated, linearized, and protected analog I/O in compact, hot-swappable modules for PLC, DCS, and data acquisition systems.

FAQ

What RTD type and temperature range does the 5B35-N-01 support?

The 5B35-N-01 supports 120 Ω nickel RTDs with temperature coefficient α = 0.00672 across 0°C to +300°C. It delivers a linearized 0 V to +5 V output with ±0.40°C total accuracy. The module uses dedicated 0.25 mA excitation and four-wire sensing to eliminate lead resistance error-making it distinct from platinum or copper variants in the 5B35 family.

Does the 5B35-N-01 provide galvanic isolation, and what are its ratings?

Yes, the 5B35-N-01 provides true three-port galvanic isolation: 1500 V_rms between input–output and input–power, and 250 V_rms between output–power. This isolation is transformer-based with proprietary modulation, enabling safe interfacing between hazardous field-side sensors and grounded control system electronics without shared ground references.

How does the 5B35-N-01 handle noise and electromagnetic interference?

The 5B35-N-01 integrates a five-pole Butterworth filter with 4 Hz –3 dB bandwidth, achieving 116 dB normal-mode rejection at 60 Hz and 190 dB common-mode rejection at 50/60 Hz. Tested per EN50082-1, it maintains <±0.5% span error under 400 MHz, 5 W RF fields at 3 ft-ensuring reliable operation in electrically noisy industrial environments without external filtering.

Can the 5B35-N-01 be used in hazardous locations, and what certifications apply?

Yes, the 5B35-N-01 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 nonincendive design requires no special enclosures, relying on intrinsic energy limitation and isolation to prevent ignition in hazardous areas.

What are the power requirements and thermal specifications for the 5B35-N-01?

The 5B35-N-01 operates from +5 V dc ±5% and draws 15 mA typical supply current. It maintains rated performance from –40°C to +85°C ambient, with input offset drift of ±0.01°C/°C and gain drift of ±0.003% of reading/°C. Power supply sensitivity is ±0.2°C/% of Vs, ensuring stable output even with minor rail variations.