Analog Devices Inc. 5B39-01-TT

Overview

5B39-01-TT from Analog Devices is a single-channel isolated voltage-to-current signal conditioner that converts 0 V to +5 V input into a floating 4 mA to 20 mA output across loads up to 750 Ω, with ±0.05% calibrated accuracy and 1500 V_rms input-to-output isolation-used in industrial PLC analog I/O modules for 4–20 mA loop transmission.

For engineers reviewing the 5B39-01-TT datasheet, 5B39-01-TT pinout, 5B39-01-TT application, or 5B39-01-TT equivalent, key selection considerations include its transformer-based isolation architecture, track-and-hold enable capability for DAC-shared systems, 400 Hz bandwidth, and compliance with FM Class 1 Division 2 and CSA hazardous location standards.

Technical Context

The 5B39-01-TT employs proprietary transformer-coupled modulation/demodulation to achieve linear, stable isolation without optical degradation. Its V-to-I output stage delivers precise current with <80 µA/s droop in hold mode and 2 ms rise time, while maintaining ±1 V input common-to-power common tolerance.

It integrates chopper-stabilized amplification (±1 µV/°C drift), 90 dB CMR at 50/60 Hz, and ANSI/IEEE C37.90.1 transient protection on both input and output sides-enabling reliable operation in noisy industrial environments with 240 V_rms continuous input terminal withstand rating.

Key Specifications

Pinout & Package

Package: 2.275" × 2.375" × 0.595" (57.8 mm × 59.1 mm × 15.1 mm) potted module with screw-terminal field connections; compatible with all 5B Series backplanes and sockets.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated voltage-to-current conversion applications.

Compared with ADuM4160BRIZ and ISO124U, the 5B39-01-TT uniquely combines field-ready screw terminals, FM/CSA hazardous-area certification, transformer-based long-term stability, and track-and-hold synchronization-making it irreplaceable in certified industrial analog I/O systems.

Availability

5B39-01-TT is available at Aetrix Electronics and suitable for industrial process control, PLC analog expansion, hazardous area sensor interfacing, and multi-channel DAC-shared current output systems requiring stable component supply and long-lifecycle support.

Supply support for 5B39-01-TT 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, certified industrial signal conditioning-delivering transformer-isolated, hot-swappable, field-wirable modules meeting FM Class 1 Div 2 and CSA safety requirements.

FAQ

What input voltage range does the 5B39-01-TT support?

The 5B39-01-TT supports a 0 V to +5 V input voltage range, with absolute maximum ratings of −10 V to +10 V without damage. It requires the input common to remain within ±1 V of power common. This range aligns directly with standard industrial sensor outputs and DAC references, eliminating the need for external level-shifting circuitry in most applications.

Does the 5B39-01-TT provide true 4–20 mA current output with load regulation?

Yes, the 5B39-01-TT delivers a precisely regulated 4–20 mA output across loads from 0 Ω to 750 Ω when powered at +4.95 V or higher. Its internal V-to-I converter maintains output accuracy within ±0.05% span across this full load range, ensuring consistent loop current regardless of receiver impedance-critical for reliable field device communication.

Can the 5B39-01-TT be used in hazardous locations?

Yes, the 5B39-01-TT is certified by Factory Mutual (FM) for Class 1, Division 2, Groups A, B, C, and D, and approved by the Canadian Standards Association (CSA) for the same classification. These approvals confirm its suitability for use in areas where flammable gases may be present only under fault conditions-enabling deployment without additional explosion-proof enclosures.

How does the track-and-hold function work in the 5B39-01-TT?

The 5B39-01-TT includes a track-and-hold input circuit controlled by a Write Enable signal. When asserted high (+2.5 V to +36 V), the output holds its last value with a droop rate of 80 µA/s-allowing a 25 ms refresh interval for ≤0.01% span error. On power-up, the 5B39-01-TT defaults to 0 mA output for ~100 ms to allow safe initialization.

What isolation rating does the 5B39-01-TT provide between input and output?

The 5B39-01-TT provides 1500 V_rms continuous isolation between input and output, and between output and power supply. This transformer-based isolation meets industrial surge immunity standards (ANSI/IEEE C37.90.1) and enables safe interfacing between ungrounded field devices and grounded control systems-preventing ground-loop errors and equipment damage.