AMPLIFIER – SPECIAL PURPOSE

AD694ARZ – 4-20mA Current Transmitter IC – Analog Devices

Precision-engineered by Analog Devices, the AD694ARZ is a monolithic current transmitter IC designed for robust industrial signal conditioning. This surface-mount device converts voltage inputs to industry-standard 4-20mA current loop outputs, ensuring noise-resistant transmission in harsh environments. PCX guarantees authentic Analog Devices components with same-day shipping and dedicated technical support.

Key Features

• Type: 4-20mA Current Transmitter
• Input: Voltage (0-10V range)
• Output: Voltage (4-20mA compatible)
• Supply Current: 23mA typical
• Operating Temperature: -40°C to +85°C
• Package: 16-SOIC (7.50mm Width)
• Status: Active production

Technical Specifications

The AD694ARZ integrates critical signal conditioning circuitry in a compact SOIC-16 package. It features built-in voltage reference and amplifier stages for direct sensor interfacing, requiring minimal external components. With an operating voltage range of +4.5V to +36V, it supports loop-powered configurations. The device maintains ±0.5% linearity across its full industrial temperature range (-40°C to +85°C) and includes overvoltage protection for enhanced reliability.

Typical Applications

• Industrial process control systems
• PLC analog input/output modules
• Pressure and temperature transmitters
• HVAC and building automation
• Remote sensor signal conditioning

About Analog Devices

Analog Devices Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies. With over 50 years of innovation, ADI solutions reliably convert real-world phenomena into actionable insights across industrial, automotive, and communications sectors.

ADI maintains rigorous quality certifications including ISO 9001 and IATF 16949, ensuring components meet stringent automotive and industrial reliability standards. Their commitment to precision engineering makes ADI ICs the preferred choice for mission-critical signal chain applications worldwide.

About Current Transmitter ICs

Current transmitter integrated circuits convert sensor voltages into standardized current signals, typically 4-20mA, for industrial control systems. This conversion enables noise-immune signal transmission over long cable runs, critical in electrically noisy environments like factories and process plants.

These ICs simplify design by integrating precision references, amplifiers, and output stages in single packages. Modern transmitter ICs like the AD694 series provide configurable ranges, fault detection, and temperature-stable performance—reducing calibration needs while improving system reliability in industrial automation applications.

Packaging Information

Available in protective Tube packaging for automated assembly processes. Contact PCX for reel quantity options and kitting services.

FAQs

Q: What input voltage range does the AD694ARZ support?
A: It accepts 0-10V inputs without external scaling, with optional resistors for other ranges.

Q: Is this IC suitable for hazardous environments?
A: While intrinsically safe designs require system certification, the AD694ARZ’s -40°C to +85°C operating range makes it ideal for industrial control panels.

Q: Does it need external calibration?
A: Factory-trimmed circuitry maintains ±0.5% accuracy without calibration under normal conditions.

Q: Can I use this with 3-wire sensors?
A: Yes, it supports 2-wire (loop-powered) and 3-wire configurations with appropriate wiring.

Q: What distinguishes current transmitters from converters?
A: Transmitters like the AD694 provide complete signal conditioning with standardized outputs, while basic converters lack buffering and scaling features.

Q: Are evaluation boards available?
A: PCX provides datasheets and design resources. Contact our support team for application-specific guidance.

Product images are representational. Refer to PCX datasheet for exact specifications.

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