AD694ARZ

Overview

The AD694ARZ is a monolithic current loop transmitter integrated circuit manufactured by Analog Devices Inc. It accepts voltage inputs and generates standard 4-20 mA current outputs for industrial process control applications. The device operates within a supply voltage range of 4.5 V to 36 V and consumes a typical operating current of 1.5 mA. Key electrical specifications include an input bias current of 5 nA, an input offset voltage of 150 µV, and a common-mode rejection ratio (CMRR) of 80 dB. It is housed in a 16-SOIC surface-mount package with a width of 7.50 mm and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates instrumentation amplifier and current loop driver functions into a single chip
• Provides high common-mode rejection for accurate signal transmission in noisy environments
• Supports dual power supply configurations for flexible system integration

Applications

• Industrial process control sensor interfaces
• Temperature and pressure transmitter circuits
• Remote monitoring systems requiring 4-20 mA isolation

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Check the manufacturer's official website for current lifecycle status, as availability may be limited. Confirm RoHS compliance and packaging details against the latest datasheet before procurement to ensure compatibility with existing assembly processes.

Selection Notes

Select this component when a compact solution for converting low-level voltage signals to standardized current loops is required. Ensure the application environment stays within the specified -40°C to +85°C temperature range. Verify that the input signal levels are compatible with the device's voltage input capabilities and that the power supply constraints align with the 4.5 V to 36 V operational window.

Part Context

The AD694 belongs to the AD694 family of current transmitters designed for robust industrial communication. It serves as a bridge between sensitive sensor outputs and long-distance transmission lines. The ARZ suffix indicates a lead-free, RoHS-compliant variant packaged in a standard 16-pin SOIC format suitable for automated surface-mount assembly.

Replacement Considerations

Consult the official AD694 datasheet for direct pin-compatible alternatives or upgraded versions within the Analog Devices portfolio. Verify functional equivalence regarding input/output characteristics and thermal performance before substitution.