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Home > Products > Sensors, Transducers > Sensor, Transducer Amplifiers

Analog Devices Inc. 5B37-K-02

Name: 5B37-K-02
Brand: Analog Devices Inc.
SKU: 5B37-K-02
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5B37-K-02

Manufacturer:: Analog Devices Inc.

Category:: Sensor, Transducer Amplifiers

Package:

Datasheet:: 5B37-K-02.pdf

Description:: MODULE ISOL THERMO-IN LIN

Quantity:: RFQ Add To RFQ list

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Inventory:1,189

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Product details

Overview

5B37-K-02 from Analog Devices is a single-channel isolated thermocouple input signal conditioner for Type K thermocouples, delivering 0 to +5 V isolated output with ±0.05% span accuracy, 4 Hz bandwidth, and 1500 V_rms continuous input-to-output isolation. It performs cold-junction compensation (±0.25°C @ +25°C), chopper-stabilized amplification (±1 µV/°C input offset drift), and multi-pole filtering for industrial temperature monitoring in hazardous locations.

For engineers reviewing the 5B37-K-02 datasheet, 5B37-K-02 pinout, 5B37-K-02 application, or 5B37-K-02 equivalent, key selection criteria include its certified Class 1 Division 2 nonincendive rating, hot-swappable 5B-series compatibility, open-thermocouple detection (upscale response), and field-side 240 V_rms continuous overvoltage protection without damage.

Technical Context

The 5B37-K-02 implements transformer-based galvanic isolation with proprietary modulation for linear signal recovery, featuring a fully floating differential input stage eliminating input grounding requirements. Its chopper-stabilized amplifier achieves ±1 µV/°C input offset drift and laser-trimmed zero-scale subtraction for expanded-scale measurements.

Internal cold-junction compensation uses an on-board sensor (e.g., AC1361) to correct parasitic thermocouple errors at screw terminals, enabling ±0.25°C accuracy at +25°C ambient. A 4 Hz multi-pole low-pass filter delivers 60 dB normal-mode rejection at 60 Hz and enhances common-mode rejection to 160 dB with 1 kΩ source imbalance.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Type	Type K thermocouple (−100°C to +1350°C)
Output Range	0 V to +5 V, low-impedance buffered output (50 Ω)
Isolation Rating	1500 V_rms continuous input-to-output; meets ANSI/IEEE C37.90.1 transient standards
Accuracy	±0.05% span ±10 µV RTI ±0.05% of Vz + CJC error
Bandwidth	4 Hz (−3 dB), optimized for stable thermocouple signal acquisition in noisy industrial environments
Cold-Junction Comp.	±0.25°C initial error @ +25°C; ±0.5°C over +5°C to +45°C operating range
Input Protection	Withstands 240 V_rms continuous at screw terminals; no damage to computer-side circuitry

Pinout & Package

5B37-K-02 uses a standardized 4-pin DIP-style module package (2.275" × 2.375" × 0.595"; 57.8 mm × 59.1 mm × 15.1 mm), potted for industrial reliability and identical in footprint/pinout across all 5B Series modules.

Pin/Terminal	Circuit Role	Design Meaning
1	−EXC	Negative excitation terminal for optional sensor excitation; tied internally to LO when unused
2	LO	Low-side input reference; forms differential pair with HI; floating field-side return
3	HI	High-side thermocouple input; accepts millivolt-level signal from Type K junction
4	n/c	No connection; not internally bonded; must remain unconnected

Key Features

Feature	Design Value
Hot-swappable 5B-series compatibility	Enables module replacement without power-down or rewiring-supports modular backplane systems with screw-terminal field I/O
Open thermocouple detection	Generates predictable upscale output (≥+5 V) within 10 seconds; downscale option via 47 MΩ resistor across pins 1 & 3
Nonincendive certification	FM and CSA approved for Class 1, Division 2, Groups A/B/C/D-safe for use where flammable gas may exist only under fault conditions
EMI/RFI immunity	Meets EN50082-1/EN50081-2; <0.1% FS error at 10 V/m, 1 GHz field strength per installation guidelines
Zero-scale suppression	Laser-trimmed input offset subtraction enables precise expanded-scale measurement of small ΔT spans

Applications

Industrial Temperature Monitoring	Hazardous Area Process Control
Use Scenario: Continuous temperature logging in chemical reactor vessels with high EMI and ground potential differences. IC Role / Device Role / Timing Role: Isolated thermocouple interface and signal conditioning module converting Type K mV output to clean 0–5 V analog signal. Use Value: Eliminates ground loops and protects DAQ system from 240 V_rms transients while maintaining ±0.25°C CJC accuracy at ambient.	Use Scenario: Flame detection and furnace temperature supervision in oil refinery burner management systems. IC Role / Device Role / Timing Role: Certified nonincendive signal conditioner enabling safe thermocouple interfacing in Class 1 Div 2 zones without explosion-proof enclosures. Use Value: FM/CSA approval removes need for costly physical safeguards; hot-swap capability allows maintenance without process shutdown.
Programmable Logic Controller I/O	Data Acquisition System Front-End
Use Scenario: Adding thermocouple inputs to Allen-Bradley or Siemens PLC analog input racks via 5B backplanes. IC Role / Device Role / Timing Role: Field-side signal conditioner providing isolated, filtered, and cold-junction-compensated voltage output compatible with PLC ADC inputs. Use Value: Mix-and-match 5B-series modularity allows custom I/O channel configuration; 4 Hz bandwidth suppresses 60 Hz noise in factory-floor environments.	Use Scenario: High-reliability front-end for National Instruments or Keysight DAQ systems measuring kiln or turbine exhaust temperatures. IC Role / Device Role / Timing Role: Precision analog signal conditioner delivering calibrated 0–5 V output with traceable ±0.05% span accuracy and low-drift performance. Use Value: Chopper-stabilized gain (±0.0025%/°C) and low 0.2 µV_rms input noise enable sub-degree resolution over full −100°C to +1350°C range.

Industrial Temperature Monitoring

Hazardous Area Process Control

Use Scenario: Continuous temperature logging in chemical reactor vessels with high EMI and ground potential differences.

IC Role / Device Role / Timing Role: Isolated thermocouple interface and signal conditioning module converting Type K mV output to clean 0–5 V analog signal.

Use Value: Eliminates ground loops and protects DAQ system from 240 V_rms transients while maintaining ±0.25°C CJC accuracy at ambient.

Use Scenario: Flame detection and furnace temperature supervision in oil refinery burner management systems.

IC Role / Device Role / Timing Role: Certified nonincendive signal conditioner enabling safe thermocouple interfacing in Class 1 Div 2 zones without explosion-proof enclosures.

Use Value: FM/CSA approval removes need for costly physical safeguards; hot-swap capability allows maintenance without process shutdown.

Programmable Logic Controller I/O

Data Acquisition System Front-End

Use Scenario: Adding thermocouple inputs to Allen-Bradley or Siemens PLC analog input racks via 5B backplanes.

IC Role / Device Role / Timing Role: Field-side signal conditioner providing isolated, filtered, and cold-junction-compensated voltage output compatible with PLC ADC inputs.

Use Value: Mix-and-match 5B-series modularity allows custom I/O channel configuration; 4 Hz bandwidth suppresses 60 Hz noise in factory-floor environments.

Use Scenario: High-reliability front-end for National Instruments or Keysight DAQ systems measuring kiln or turbine exhaust temperatures.

IC Role / Device Role / Timing Role: Precision analog signal conditioner delivering calibrated 0–5 V output with traceable ±0.05% span accuracy and low-drift performance.

Use Value: Chopper-stabilized gain (±0.0025%/°C) and low 0.2 µV_rms input noise enable sub-degree resolution over full −100°C to +1350°C range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADAM-4018-T	8-channel Ethernet-enabled module; 16-bit ADC; no transformer isolation (opto-isolated only); 1500 V_p isolation rating	Designed for networked distributed I/O; requires external power and Ethernet infrastructure	Select when remote monitoring, web-based configuration, or multi-channel consolidation is required over standalone analog output
SCXI-1122	NI SCXI module; 16-bit resolution; 2500 V_rms isolation; supports J/K/T/E/R/S/B/N types; requires SCXI chassis and controller	Targeted for LabVIEW-based test systems; not hot-swappable in field wiring; higher cost per channel	Select when integrated with NI hardware ecosystem and high-channel-count precision scanning is needed

Compared with ADAM-4018-T and SCXI-1122, the 5B37-K-02 offers superior transformer-based isolation stability, certified nonincendive operation for hazardous areas, and true hot-swap capability without system interruption-making it optimal for safety-critical, modular, and field-deployed industrial control.

Availability

5B37-K-02 is available at Aetrix Electronics and suitable for industrial temperature monitoring, hazardous area process control, and programmable logic controller I/O requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for 5B37-K-02 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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and industrial applications.

The 5B Series was engineered to deliver cost-effective, certified, and field-deployable signal conditioning for harsh industrial environments-emphasizing safety, modularity, and ease of integration into legacy and new control systems.

FAQ

What thermocouple types does the 5B37-K-02 support?

The 5B37-K-02 is specifically configured for Type K thermocouples with a standard input range of −100°C to +1350°C. While the broader 5B37 family supports J, T, E, R, S, B, N, and C types, the 5B37-K-02's internal calibration, cold-junction compensation, and filtering are optimized exclusively for Type K characteristics. Using it with other thermocouple types will result in significant measurement error.

Does the 5B37-K-02 require external cold-junction compensation?

No. The 5B37-K-02 integrates internal cold-junction compensation using a precision sensor (e.g., AC1361) located on the module's field-side circuitry. This provides ±0.25°C accuracy at +25°C ambient and eliminates the need for external CJC hardware-critical for reliable temperature measurement when thermocouple wires connect directly to the module's screw terminals.

Can the 5B37-K-02 be used in Class 1, Division 2 hazardous locations?

Yes. The 5B37-K-02 carries Factory Mutual (FM) and Canadian Standards Association (CSA) certifications for Class 1, Division 2, Groups A, B, C, and D. These approvals confirm its nonincendive design-meaning it cannot ignite flammable gases under normal or fault conditions-enabling safe deployment without explosion-proof enclosures in specified hazardous areas.

What is the open thermocouple response behavior of the 5B37-K-02?

The 5B37-K-02 provides an upscale open thermocouple response: when the thermocouple loop opens, the output rises above +5 V within 10 seconds, signaling a fault condition. To configure downscale response instead, connect a 47 MΩ, 0.25 W resistor across screw terminals 1 (−EXC) and 3 (HI). This behavior is inherent to the 5B37-K-02's internal diagnostics circuitry.

Is the 5B37-K-02 compatible with standard 5B Series backplanes?

Yes. The 5B37-K-02 shares identical mechanical dimensions (2.275" × 2.375" × 0.595"), pinout, and electrical interface with all 5B Series modules. It is fully mix-and-match and hot-swappable-allowing insertion or removal from any powered 5B backplane (e.g., 5B01, 5B08) without disrupting field wiring, system power, or adjacent modules' operation.

5B37-K-02 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Amplifier Type:: Analog Output

Voltage - Supply:: 4.75V ~ 5.25V

Output Type:: Analog

Current - Supply:: 30 mA

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

5B37-K-02 FAQ

1.How can I place an order for 5B37-K-02 through Aetrix?

Please submit a Request for Quotation (RFQ) for 5B37-K-02 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 5B37-K-02 reliable?

The price and inventory of 5B37-K-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5B37-K-02 is usually 5 days.

3.What payment methods are accepted for 5B37-K-02?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5B37-K-02 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 5B37-K-02?

5B37-K-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5B37-K-02 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 5B37-K-02?

For technical support, including 5B37-K-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5B37-K-02 requirements.

6.How does Aetrix verify that 5B37-K-02 is sourced from the original manufacturer or authorized distributors?

All 5B37-K-02 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 5B37-K-02 meets industry standards.

7.What is the process for return or replacement of 5B37-K-02?

All 5B37-K-02 units undergo pre-shipment inspection (PSI). If there is an issue with 5B37-K-02, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 5B37-K-02 part is unused and in its original packaging.

Return procedure for 5B37-K-02:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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