Overview
The AD694ARZ-REEL, produced by Analog Devices Inc., is a monolithic current transmitter designed to drive a standard 4–20 mA current loop. This component is ideal for controlling valves, actuators, and other devices commonly used in process control. It accepts high-level signal inputs and provides a noise-immune 4–20 mA signal transmission, making it a crucial building block for various industrial and automation systems.
Key Specifications
| Number of channels | 1 |
|---|---|
| Version | Current transmitter |
| Enclosure | SOIC-16 |
| Maximum operating temperature | 85 °C |
| Minimum operating temperature | -40 °C |
| Assembly | SMD |
| Supply voltage range | 4.5 V to 36 V |
| Input voltage ranges | 0 V to 2 V, 0 V to 10 V (precalibrated) |
| Output compliance | Extends to within 2 V of the positive supply and below common |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Pin count | 16 |
Key Features
- Open-loop alarm: Warns of an open 4–20 mA loop or noncompliance of the output stage.
- Precision voltage reference: Programmable to 2.000 V or 10.000 V.
- Single or dual supply operation: Supports a wide power supply range of 4.5 V to 36 V.
- Input buffer amplifier: Can be used to scale the input signal or buffer the output from a current mode DAC.
- Wide output compliance: Extends to within 2 V of the positive supply and below common.
- Optional external pass transistor: To reduce self-heating errors and extend the temperature range of operation.
Applications
- Industrial process control: Ideal for systems requiring noise-immune 4–20 mA signal transmission to operate valves, actuators, and other control devices.
- Factory automation: Used in various automation systems to transmit process parameters such as pressure, temperature, or flow.
- System monitoring: Suitable for monitoring and controlling systems in industrial environments.
Q & A
- What is the primary function of the AD694ARZ-REEL?
The AD694ARZ-REEL is a monolithic current transmitter that drives a standard 4–20 mA current loop for controlling valves, actuators, and other devices in process control.
- What are the precalibrated input voltage ranges for the AD694ARZ-REEL?
The precalibrated input voltage ranges are 0 V to 2 V and 0 V to 10 V.
- What is the supply voltage range for the AD694ARZ-REEL?
The supply voltage range is from 4.5 V to 36 V.
- Does the AD694ARZ-REEL support single or dual supply operation?
Yes, it supports both single and dual supply operation.
- What is the purpose of the input buffer amplifier in the AD694ARZ-REEL?
The input buffer amplifier can be used to scale the input signal or buffer the output from a current mode DAC.
- How does the open-loop alarm feature work in the AD694ARZ-REEL?
The open-loop alarm warns of an open 4–20 mA loop or noncompliance of the output stage.
- Can the AD694ARZ-REEL be used with external components to enhance its functionality?
Yes, an external pass transistor can be used to reduce self-heating errors and extend the temperature range of operation.
- What are the typical applications of the AD694ARZ-REEL?
It is used in industrial process control, factory automation, and system monitoring.
- What is the operating temperature range for the AD694ARZ-REEL?
The operating temperature range is from -40 °C to 85 °C.
- Is the AD694ARZ-REEL RoHS compliant?
Yes, the AD694ARZ-REEL is RoHS compliant.
