Overview
The Analog Devices 2B22J is a precision isolated voltage-to-current converter module designed for industrial process control, monitoring systems, and data acquisition. It converts 0–10V input signals into industry-standard 4–20mA loop current outputs with complete galvanic isolation between input and output circuits. This isolation provides protection against transient voltages and ground loop noise, making the 2B22J ideal for separation of subsystems or physically distributed control nodes.
Key Features
- Isolated voltage-to-current conversion: Transforms 0–10V input to 4–20mA output with galvanic isolation
- High accuracy: ±0.25% maximum error for repeatable signal conditioning
- Wide supply range: Single-supply operation from +14V to +32V
- Integrated loop power: Provides isolated +28V internal loop power with support for external 0–1000Ω load resistance
- Adjustable span and offset: Optional external potentiometer trimming for custom calibration
- Industrial module packaging: Compact, board-level format suitable for OEM integration or panel mounting
Technical Specifications
- Input Signal: 0 to +10V
- Output Signal: 4 to 20mA
- Input Impedance: High impedance (typical operation with signal source)
- Output Current Capability: 0–1000Ω load resistance
- Supply Voltage (single): +14V to +32V DC
- Internal Loop Power: +28V isolated
- Accuracy: ±0.25% max (2B22J/2B22K models)
- Isolation Voltage: Galvanic isolation between input and output
- Packaging: Modular integrated circuit (IC) form
Typical Applications
- Process control systems requiring isolated signal transmission
- Industrial monitoring with distributed transducer networks
- Data acquisition and transmitter interfaces
- Strain-gauge, temperature, and pressure signal conditioning
- Protection against noise and transient voltage spikes in harsh industrial environments
- Multi-channel signal multiplexing in PLC and automation systems
Compatibility & Replacements
Compatible With
- Industrial process control systems and PLCs
- Data acquisition cards and modules
- Analog signal monitoring equipment
- Distributed control networks with isolated sensor inputs
- 4–20mA current-loop transmitter standards (IEC 60381)
Replaces / Drop-In Replacement For
- Earlier Analog Devices isolated voltage-to-current converter models (2B22K, 2B22L variants with identical pinout and specifications)
- Legacy industrial signal conditioning modules requiring galvanic isolation
- Note: Verify exact pinout and supply voltage compatibility with your system integrator before substitution
Works With
- Industrial I/O modules and signal conditioning boards
- PLC analog input cards (4–20mA input modules)
- SCADA systems and distributed I/O networks
- Process automation and control loop applications
- Field transmitters and transducer conditioning
