Analog Devices Inc. 7B27-J-13-1

Overview

7B27-J-13-1 from Analog Devices is a single-channel isolated thermocouple input signal conditioner for Type J thermocouples, providing factory-configured +1 V to +5 V output, ±0.01% initial accuracy, 3 Hz bandwidth, and 100 V_rms input-to-output isolation. It operates over –40°C to +85°C and supports industrial process control in high-noise factory-floor environments.

For engineers reviewing the 7B27-J-13-1 datasheet, 7B27-J-13-1 pinout, 7B27-J-13-1 application, or 7B27-J-13-1 equivalent, key selection considerations include its +300°C to +600°C input range, cold junction compensation accuracy of ±1.0°C (ambient +5°C to +45°C), low output impedance (<1 Ω), and compatibility with 7B Series backplanes (AC 1363) requiring screw-terminal field wiring and 25-pin D-sub interface.

Technical Context

The 7B27-J-13-1 implements transformer-based amplitude modulation for 100 V_rms continuous isolation, with internal DC/DC conversion powering the isolated front-end. Its signal path includes a one-pole 3 Hz anti-alias filter, low-drift amplifier, thermistor-based cold junction compensation embedded under the input terminal block, and a two-pole output low-pass filter (–3 dB @ 3 Hz).

It delivers linearized voltage output referenced to the specified temperature span (+300°C to +600°C), uses a current source for upscale open-circuit detection, and features gold-plated socket mating on 7B Series backplanes. Input protection withstands ±30 V_dc continuously and meets ANSI/IEEE C37.90.1-1989 transient immunity standards.

Key Specifications

Pinout & Package

7B27-J-13-1 uses a 6-pin plug-in module package (42.24 mm × 53.6 mm × 14.3 mm) compatible with 7B Series universal backplanes (e.g., AC 1363). Pin assignments follow the standardized 7B Series pinout for hot-swap interoperability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADAM-4018-BE and OMEGA iDRN-TC, the 7B27-J-13-1 uniquely combines factory-range calibration for +300°C to +600°C Type J, integrated backplane CJC, and true hot-swap operation - making it optimal for retrofitting legacy 7B Series racks without firmware or wiring changes.

Availability

7B27-J-13-1 is available at Aetrix Electronics and suitable for industrial process monitoring, furnace temperature control, boiler safety interlocks, and power plant combustion monitoring requiring stable component supply, long-term lifecycle support, and compatibility with existing 7B Series infrastructure.

Supply support for 7B27-J-13-1 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 7B Series was designed specifically for rugged industrial signal conditioning - delivering isolation, linearity, and modularity in factory-floor and process control environments where reliability and ease of maintenance are critical.

FAQ

What temperature range does the 7B27-J-13-1 support?

The 7B27-J-13-1 is factory configured for Type J thermocouples over the +300°C to +600°C range (572°F to 1112°F), with corresponding +1 V to +5 V linear output. This range is laser-trimmed during manufacturing and cannot be reconfigured in the field. The 7B27-J-13-1 achieves ±0.01% initial accuracy within this span at +25°C, and maintains stability across the full –40°C to +85°C operating temperature range.

Does the 7B27-J-13-1 require an external cold junction sensor?

No. The 7B27-J-13-1 relies on the thermistor-based cold junction compensation (CJC) sensor embedded under the input screw terminal block of compatible 7B Series backplanes (e.g., AC 1363). This integrated CJC delivers ±1.0°C accuracy over +5°C to +45°C ambient - eliminating need for external sensors or software compensation. The 7B27-J-13-1 will not function correctly without a properly installed 7B Series backplane providing this reference.

Can the 7B27-J-13-1 be used with non-7B Series mounting hardware?

No. The 7B27-J-13-1 requires mechanical and electrical compatibility with Analog Devices' 7B Series backplanes (AC 1363 family), which provide the correct 6-pin gold-plated socket, CJC thermistor location, power distribution, and grounding architecture. Using alternate carriers risks loss of isolation integrity, CJC inaccuracy, open-circuit detection failure, and violation of the 100 V_rms isolation rating certified for the 7B27-J-13-1.

What is the warm-up time required for the 7B27-J-13-1 to meet specifications?

The 7B27-J-13-1 requires approximately 10 minutes of power-on warm-up time to stabilize internal references, amplifier offsets, and isolation circuitry before achieving full ±0.01% initial accuracy and guaranteed 3 Hz bandwidth performance. This warm-up period is defined in the official Rev. 0 datasheet and applies regardless of ambient temperature within the –40°C to +85°C operating range. System designs must account for this delay before initiating critical measurements.

How does the 7B27-J-13-1 handle thermocouple wire breakage?

The 7B27-J-13-1 implements an active upscale open-circuit detection circuit using an internal current source. When thermocouple continuity is lost, the output voltage rises above +5 V (for +1 V to +5 V range) to indicate fault condition - enabling immediate system-level alarm or shutdown. This behavior is intrinsic to the 7B27-J-13-1's analog signal path and requires no configuration or external components. The detection threshold and response time are fully characterized in the datasheet.