Analog Devices Inc. 5B30-03-NI

Overview

5B30-03-NI from Analog Devices is a single-channel isolated voltage input signal conditioner that amplifies, filters, protects, and isolates millivolt-level analog signals. It accepts ±100 mV input range, delivers ±5 V output, provides 1500 V_rms continuous isolation, and features chopper-stabilized amplification with ±1 µV/°C input offset drift-used in industrial temperature monitoring systems with thermocouple front-ends.

For engineers reviewing the 5B30-03-NI datasheet, 5B30-03-NI pinout, 5B30-03-NI application, or 5B30-03-NI equivalent, key selection criteria include its ±100 mV input range, transformer-based isolation architecture, 4 Hz low-pass filter cutoff, field-side floating differential input, and hot-swappable 2.27" × 2.32" × 0.595" module form factor.

Technical Context

The 5B30-03-NI implements transformer-coupled signal isolation using proprietary modulation for linear performance, with a chopper-stabilized input amplifier delivering ±1 µV/°C input offset drift and ±25 ppm/°C gain stability. Its fully floating differential input eliminates need for input grounding, and internal multi-pole filtering achieves 160 dB common-mode rejection at 50/60 Hz with 4 Hz –3 dB bandwidth.

Input protection withstands 240 V_rms continuously at screw terminals; output includes a series switch controlled by active-low enable, and output common must remain within ±3 V of power common. The module operates across –40°C to +85°C and meets FM Class 1 Division 2 and CSA hazardous location approvals.

Key Specifications

Pinout & Package

5B30-03-NI uses a standardized 4-pin screw-terminal input interface in a potted, DIN-rail-mountable module measuring 2.275" × 2.375" × 0.595" (57.8 mm × 59.1 mm × 15.1 mm). Pin assignments are field-side only; no computer-side pins are user-accessible.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated voltage input conditioning applications.

Compared with 5B30-03 and AD210BN, the 5B30-03-NI uniquely combines FM/CSA non-incendive certification, integrated 4 Hz filtering, and ±100 mV input range in a hot-swappable module-making it the sole option qualified for certified hazardous-area deployment with millivolt-level sensor interfacing.

Availability

5B30-03-NI is available at Aetrix Electronics and suitable for industrial temperature monitoring, hazardous-area data acquisition, and legacy analog system upgrades requiring stable component supply and certified isolation performance.

Supply support for 5B30-03-NI 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 industrial, automotive, and communications markets.

The 5B Series was designed specifically for rugged industrial signal conditioning-delivering transformer-isolated, hot-swappable, FM/CSA-certified modules that replace custom-built isolation solutions in measurement and control systems.

FAQ

What is the input voltage range supported by the 5B30-03-NI?

The 5B30-03-NI supports a nominal input range of ±100 mV, optimized for low-level millivolt sources such as thermocouples and strain gauge bridges. This range is factory-set and laser-trimmed for accuracy; the module does not support reconfiguration to other ranges without custom ordering. Input overload protection sustains up to 240 V_rms without damage, ensuring robustness in industrial environments where voltage transients occur.

Does the 5B30-03-NI require external power supply filtering or decoupling?

No, the 5B30-03-NI operates from a single +5 V ±5% supply and incorporates internal regulation and noise suppression. Its power supply sensitivity is specified at ±2 µV/V_s% RTI, meaning supply ripple contributes negligible error. A standard 10 µF bulk capacitor near the backplane power entry is sufficient; no additional local decoupling is required at the module level due to its potted construction and integrated filtering.

Can the 5B30-03-NI be used with grounded or single-ended sensors?

Yes-the 5B30-03-NI's fully floating differential input allows connection to grounded, single-ended, or ungrounded sensors without modification. The LOW – and HIGH + terminals form a true differential pair with no reference to system ground; this eliminates ground-loop errors and enables direct interface to sensors with arbitrary grounding schemes, including those referenced to earth or chassis potential.

What certifications apply to the 5B30-03-NI for hazardous area use?

The 5B30-03-NI carries Factory Mutual (FM) and Canadian Standards Association (CSA) approvals for Class 1, Division 2, Groups A, B, C, and D locations. These certifications confirm its non-incendive classification-meaning it may be used where flammable gases could exist only under fault conditions, without requiring explosion-proof enclosures. The "NI" suffix explicitly denotes this certified non-incendive status, distinguishing it from standard 5B30-03 units.

How does the 4 Hz bandwidth affect signal fidelity in process control applications?

The 4 Hz –3 dB bandwidth of the 5B30-03-NI is intentionally optimized for industrial process variables (e.g., temperature, pressure, flow), which change slowly and are dominated by 50/60 Hz noise. This fixed low-pass response rejects line-frequency interference while preserving step response fidelity for typical loop update rates. Rise time is 200 ms (10% to 90%), aligning with standard PID controller scan times and eliminating need for external filtering.