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The AD694AQ is a precision voltage-to-current converter manufactured by Analog Devices Inc. (ADVANCED). Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: Analog Devices Inc. (ADVANCED)
• Model: AD694AQ
• Type: Voltage-to-Current Converter (V/I Converter)
• Supply Voltage Range: +4.5V to +36V
• Output Current Range: 4mA to 20mA (standard industrial loop current)
• Input Voltage Range: 0V to 10V (standard), supports other ranges with external components
• Accuracy: ±0.2% (typical)
• Operating Temperature Range: -40°C to +85°C
• Package: 16-pin CERDIP (Ceramic Dual In-Line Package)
• Input Impedance: High (typically 1MΩ)
• Output Compliance Voltage: Up to 24V (with 36V supply)
• Bandwidth: 500kHz (typical)

Descriptions:

The AD694AQ is a monolithic IC designed to convert a voltage input signal into a precision 4mA–20mA current output, commonly used in industrial control and instrumentation applications. It features a high-accuracy output with minimal external components required. The device includes an internal reference voltage, op-amp, and current output stage, making it suitable for loop-powered transmitters and process control systems.

Features:

• Complete V/I Converter: Integrates all necessary components for 4mA–20mA conversion.
• Wide Supply Range: Operates from +4.5V to +36V, supporting various industrial power supplies.
• High Accuracy: Low offset and gain errors ensure precise current output.
• On-Chip Reference: Includes a 10V reference for input scaling.
• Current Limiting: Built-in protection against excessive output current.
• Flexible Input Range: Can be configured for 0V–2V, 0V–10V, or other ranges with external resistors.
• Robust Packaging: Available in a 16-pin CERDIP package for industrial environments.

The AD694AQ is widely used in process control, industrial automation, and sensor signal conditioning applications where reliable voltage-to-current conversion is required.