The **ADR363BUJZ-R2** is a high-precision, low-power, low-noise voltage reference integrated circuit manufactured by **Analog Devices**. It is part of the ADR36x family, known for its small form factor and excellent temperature stability. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the ADR363BUJZ-R2: | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 3.0 V | | **Initial Accuracy** | ±0.1% (B-Grade) | | **Temperature Coefficient** | 9 ppm/°C (Maximum) | | **Input Voltage Range** | 3.3 V to 15 V | | **Supply Current** | 190 µA (Maximum) | | **Output Current Drive** | +5 mA (source) / -1 mA (sink) | | **Package Type** | TSOT-23-5 (UJ-5) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Core Functional Parts and Features #### A. Bandgap Reference Core The heart of the device is a refined bandgap architecture. Unlike standard references, the ADR36x family utilizes proprietary curvature correction techniques to minimize the "drift" or change in voltage as the ambient temperature fluctuates. #### B. Low Dropout (LDO) Characteristics The chip acts similarly to a high-precision LDO. It requires a very low "headroom" (voltage difference between input and output), allowing it to provide a stable 3.0V output from an input as low as 3.3V. #### C. Shutdown Pin ($SD$) The "UJ-5" package includes a shutdown pin. When pulled low, the device enters a low-power mode, reducing current consumption to less than **3 µA**, which is critical for battery-operated IoT devices. --- ### 3. Pin Configuration (TSOT-23-5) | Pin No. | Mnemonic | Description | | :--- | :--- | :--- | | 1 | **$V_{in}$** | Input Voltage Supply | | 2 | **GND** | Ground | | 3 | **SD** | Shutdown (Active Low) | | 4 | **NC** | No Internal Connection | | 5 | **$V_{out}$** | Reference Voltage Output | --- ### 4. Application Use-Cases * **Precision Data Converters:** Providing the reference voltage for 14-bit and 16-bit ADCs (Analog-to-Digital Converters). * **Portable Instrumentation:** Due to the low 190 µA current draw. * **Industrial Process Control:** Where temperature fluctuations are common and high stability (9 ppm/°C) is required. * **Smart Sensors:** Used in automotive or environmental monitoring systems. --- ### 5. Decoding the Part Number * **ADR363**: The series (3.0V Output version). * **B**: Grade (Higher accuracy/lower drift than 'A' grade). * **UJZ**: Package Code (TSOT-23-5). * **R2**: Reel size/Quantity (typically 250 units per reel).