The **ADR280ART-R2** is an ultra-low-power, high-precision voltage reference manufactured by Analog Devices. It is specifically designed for high-density, battery-powered applications where power consumption and space are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 1.2 V | | **Initial Accuracy** | ±5 mV (0.41%) | | **Temperature Coefficient** | 40 ppm/°C | | **Supply Voltage Range** | 2.4 V to 15 V | | **Quiescent Current** | 10 $\mu$A (Max) | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | SOT-23-3 (RT-3) | --- ### 2. Functional Characteristics The ADR280 belongs to a class of **Bandgap Voltage References**. It functions by generating a stable 1.2V output regardless of fluctuations in the input supply voltage or ambient temperature. * **Ultra-Low Current Consumption:** With a maximum current draw of only 10 $\mu$A, it is ideal for devices that remain in "always-on" or standby modes. * **No External Capacitor Required:** Unlike many other references, the ADR280 is stable without an output capacitor, saving PCB real estate. However, a 0.1 $\mu$F capacitor can be added to improve noise rejection if necessary. * **Wide Input Range:** It can handle up to 15V inputs, allowing it to be used in systems with varying power rails (e.g., 9V batteries or 12V industrial supplies). --- ### 3. Pin Configuration (SOT-23) | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **$V_{in}$** | Input Voltage Supply | | 2 | **$V_{out}$** | Reference Output Voltage (1.2V) | | 3 | **GND** | Ground | --- ### 4. Typical Applications * **Precision Data Acquisition:** Providing the reference voltage for low-power ADCs (Analog-to-Digital Converters). * **Battery Monitoring:** Used in handheld instruments to provide a stable baseline for measuring battery health. * **Energy Harvesting:** Because of the <10 $\mu$A current draw, it is perfect for systems powered by solar cells or piezo-elements. * **Smart Sensors:** Integrated into IoT sensor nodes for environmental monitoring. --- ### 5. Ordering Information Decoded The suffix **ART-R2** provides specific logistics information: * **ART**: Refers to the SOT-23 package style. * **R2**: Indicates the tape and reel size (typically a 7-inch reel containing 250 units).