Analog Devices Inc. 5B30-04-MB

Overview

5B30-04-MB from Analog Devices is a single-channel isolated voltage input signal conditioner that amplifies, filters, protects, and isolates millivolt-level analog signals. It accepts ±10 mV input range, delivers 0 V to +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 5B30-04-MB datasheet, 5B30-04-MB pinout, 5B30-04-MB application, or 5B30-04-MB equivalent, key selection criteria include its 4 Hz bandwidth, 240 V_rms input protection, hot-swappable 2.27" × 2.32" × 0.595" module form factor, and factory-set zero suppression for expanded-scale measurement of low-level DC signals.

Technical Context

The 5B30-04-MB implements transformer-coupled isolation with proprietary modulation for linear signal transfer and employs a chopper-stabilized input amplifier to achieve ±1 µV/°C input offset drift and ±0.05% span accuracy at +25°C. Its differential floating input eliminates need for field-side grounding.

Internal multi-pole low-pass filtering provides −3 dB cutoff at 4 Hz, delivering 160 dB common-mode rejection at 50/60 Hz with 1 kΩ source imbalance and 60 dB normal-mode rejection. The series output switch enables active-low enable control with logic "0" ≤ +1 V and logic "1" ≥ +2.5 V.

Key Specifications

Pinout & Package

5B30-04-MB uses a standardized 4-pin screw-terminal interface in a potted 2.27" × 2.32" × 0.595" (57.8 mm × 59.1 mm × 15.1 mm) module package compatible with all 5B Series backplanes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 5B30-04-MB, the 5B30-04 offers identical signal conditioning performance but omits the mounting bracket, while AD210BN trades isolation strength and integrated filtering for wider bandwidth-making 5B30-04-MB optimal for safety-critical, noise-prone industrial analog input stages.

Availability

5B30-04-MB is available at Aetrix Electronics and suitable for industrial temperature monitoring, process pressure transmitter interfacing, and rotational speed sensing requiring stable component supply, long-term lifecycle support, and FM/CSA-certified hazardous-area compatibility.

Supply support for 5B30-04-MB 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The 5B Series was designed specifically for rugged industrial signal conditioning-delivering transformer-isolated, hot-swappable, potted modules that replace custom-built isolation solutions in PLC, DCS, and data acquisition systems.

FAQ

What is the input impedance of the 5B30-04-MB when powered on?

The 5B30-04-MB has a powered-on input resistance of 5 MΩ, enabling accurate measurement of high-impedance millivolt sources such as thermocouples and unbuffered bridge sensors without loading errors. This value is specified in the official Analog Devices 5B30/5B31 datasheet Rev. 0, Page 4. The 5B30-04-MB maintains this impedance across its full −25°C to +85°C operating range.

Does the 5B30-04-MB require external power supply decoupling?

Yes, the 5B30-04-MB requires a clean +5 V ±5% supply with local 0.1 µF ceramic and 10 µF tantalum capacitors placed within 1 inch of its power pins. This is necessary to maintain its specified 0.2 µV_rms input noise and prevent switching artifacts from affecting the chopper-stabilized amplifier. The 5B30-04-MB draws 30 mA typical, and improper decoupling degrades its 160 dB common-mode rejection.

Can the 5B30-04-MB be used with thermocouple types other than J and K?

The 5B30-04-MB itself does not perform cold-junction compensation and is not thermocouple-specific-it conditions any ±10 mV DC signal. However, when paired with 5B Series backplanes containing cold-junction sensors (e.g., 5B37), it supports J, K, T, E, R, S, N, and B thermocouples. The 5B30-04-MB's role remains fixed: amplifying, isolating, and filtering the mV output prior to CJC processing.

What is the maximum allowable common-mode voltage between input and output grounds for the 5B30-04-MB?

The 5B30-04-MB supports up to 1500 V_rms continuous common-mode voltage between field-side input terminals and computer-side output/power grounds. This rating is certified per ANSI/IEEE C37.90.1-1989 transient standards and enables safe deployment in grounded-field industrial environments where ground potential differences exceed hundreds of volts. The 5B30-04-MB maintains this rating across its full temperature range.

Is the output enable function of the 5B30-04-MB internally terminated?

No, the 5B30-04-MB output enable pin is not internally terminated and requires explicit logic-level control: an active-low signal ≤ +1 V turns the output switch ON, while ≥ +2.5 V disables it. If always-enabled operation is desired, the enable input must be grounded to power common-this is explicitly required per the datasheet and cannot rely on internal pull-down. Leaving it floating may cause undefined output behavior.