The **ADR530ART-R2** is a high-precision, shunt-mode voltage reference. It is primarily used to provide a stable 3.0V output for analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other precision sensor circuits. --- ### 1. Key Technical Specifications The following table outlines the primary electrical characteristics of the ADR530ART-R2: | Parameter | Specification | Note | | :--- | :--- | :--- | | **Output Voltage ($V_{out}$)** | 3.0 V | Fixed shunt reference | | **Initial Accuracy** | ±0.1% to ±0.4% | Depending on Grade (A or B) | | **Temperature Coefficient** | 20 ppm/°C to 70 ppm/°C | Drift over temperature range | | **Operating Current Range** | 50 µA to 15 mA | Shunt current ($I_Q$) | | **Output Noise** | 15 µV p-p | 0.1 Hz to 10 Hz range | | **Package Type** | SOT-23 (3-lead) | Surface Mount Device (SMD) | | **Operating Temperature** | -40°C to +85°C | Industrial Grade | --- ### 2. Functional Description Unlike a series regulator, the ADR530 operates as a **Shunt Reference**. This means it functions similarly to a Zener diode but with significantly higher precision and stability. #### How it works: * **Shunt Topology:** It is connected in parallel with the load. * **External Resistor ($R_{ext}$):** You must use an external resistor between the input voltage source and the device to limit the current. * **Regulation:** It maintains a constant 3.0V across its terminals by adjusting its internal impedance to "shunt" excess current to the ground. --- ### 3. Pin Configuration The device typically comes in a **SOT-23-3** package: | Pin Number | Name | Description | | :--- | :--- | :--- | | **1** | **Cathode** | The regulated 3.0V output point. | | **2** | **Anode** | Connects to the system Ground (0V). | | **3** | **No Connect (NC)** | This pin should be left floating or grounded. | --- ### 4. Typical Applications The ADR530ART-R2 is ideal for space-constrained, battery-powered applications due to its low minimum operating current (50 µA). 1. **Precision Data Acquisition:** Used as a reference voltage for 12-bit or 16-bit ADCs. 2. **Portable Instrumentation:** Because it is tiny (SOT-23) and power-efficient. 3. **Process Control:** Stability in industrial transmitters. 4. **Battery Monitoring:** Provides a stable threshold for low-battery detection circuits. --- ### 5. Part Number Breakdown (ADR530ART-R2) * **ADR:** Product family (Analog Devices Reference). * **530:** 3.0V Output variant. * **A:** Accuracy Grade (Grade A is standard, Grade B is higher precision). * **RT:** Package code for SOT-23. * **R2:** Reel size/packaging (7-inch reel).