## ADR03AUJ-R2: Electronic Component Overview The **ADR03AUJ-R2** is a precision band gap voltage reference manufactured by **Analog Devices**. It is designed for high-accuracy applications where stability and low noise are critical. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics of the ADR03AUJ-R2: | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{OUT}$)** | 2.5 V | | **Input Voltage Range** | 4.5 V to 36 V | | **Initial Accuracy** | ±5 mV (0.2%) | | **Temperature Coefficient** | 10 ppm/°C (Grade A) | | **Output Current** | 10 mA (Source) / -1 mA (Sink) | | **Quiescent Current** | 1 mA (Maximum) | | **Package Type** | TSOT-23-5 (5-lead) | | **Temperature Range** | -40°C to +125°C | --- ### 2. Core Functional Components The internal architecture of the ADR03 series focuses on three main elements: * **Band Gap Reference Core:** Utilizes the predictable energy gap of silicon to provide a stable 2.5V output regardless of temperature changes. * **Low-Dropout (LDO) Output Stage:** Allows the device to maintain a steady voltage even if the input voltage is only slightly higher than the output voltage. * **Thermal Protection:** Includes internal circuitry to prevent damage due to overheating or excessive current draw. --- ### 3. Pin Configuration (TSOT-23-5) | Pin No. | Name | Function | | :--- | :--- | :--- | | 1 | **NC** | No internal connection. | | 2 | **GND** | Ground reference. | | 3 | **NC** | No internal connection. | | 4 | **$V_{IN}$** | Input supply voltage (4.5V to 36V). | | 5 | **$V_{OUT}$** | Regulated 2.5V output. | --- ### 4. Typical Applications Due to its high precision and wide input voltage range, the ADR03AUJ-R2 is commonly used in: 1. **Precision Data Acquisition:** Providing the reference voltage for 12-bit to 16-bit ADCs (Analog-to-Digital Converters). 2. **Industrial Process Control:** Used in 4-20mA loop transmitters and PLC modules. 3. **Portable Instrumentation:** Because of its small form factor (TSOT-23) and low power consumption. 4. **Medical Equipment:** High-stability requirements for monitoring and diagnostics. --- ### 5. Part Number Breakdown * **ADR03**: Device series (2.5V Output). * **A**: Grade (10 ppm/°C temperature coefficient). * **UJ**: Package designator (TSOT-23-5). * **R2**: Tape and Reel packaging (typically 250 units).