The **ADR02BUJ-R2** is a high-precision, band gap voltage reference integrated circuit (IC) manufactured by Analog Devices. It is designed to provide a highly stable 5.0V output regardless of changes in temperature or input voltage. --- ## 1. Key Technical Specifications The "B" grade in the part number signifies a higher precision tier compared to the standard "A" grade. | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 5.0 V | | **Input Voltage Range** | 7.0 V to 36 V | | **Initial Accuracy** | ±0.1% (±5 mV) | | **Temperature Coefficient** | 3 ppm/°C (Typical) | | **Output Current Capability** | 10 mA (Source) / -5 mA (Sink) | | **Quiescent Current** | 1 mA (Maximum) | | **Package Type** | TSOT-23-5 (UJ Suffix) | --- ## 2. Functional Features * **Low Noise:** It features very low wideband and peak-to-peak noise, making it ideal for high-resolution Data Acquisition Systems (DAS). * **Trim Terminal:** The device includes a "TRIM" pin (Pin 5) which allows users to fine-tune the output voltage or adjust the temperature coefficient without affecting the overall stability. * **Excellent Line/Load Regulation:** It maintains a steady output even if the input power supply fluctuates or the load demand changes. * **Wide Input Range:** Capable of handling up to 36V, allowing it to be used in industrial systems with 24V rails. --- ## 3. Pin Configuration (TSOT-23-5) The **UJ** suffix indicates the 5-lead Thin Small Outline Transistor package. | Pin Number | Mnemonic | Description | | :--- | :--- | :--- | | 1 | **TEMP** | Temperature monitoring pin (voltage proportional to temp). | | 2 | **GND** | Ground connection. | | 3 | **NC** | No internal connection. | | 4 | **$V_{in}$** | Input Voltage (7V to 36V). | | 5 | **TRIM** | Fine-tuning output voltage pin. | --- ## 4. Common Applications * **Precision Data Converters:** Used as a reference for 12-bit, 14-bit, and 16-bit ADCs and DACs. * **Industrial Controls:** High-stability reference for PLC (Programmable Logic Controller) analog I/O modules. * **Instrumentation:** Used in handheld or benchtop multimeters and sensors. * **Automotive:** Battery monitoring systems and precision pressure sensing. --- ## 5. Part Number Breakdown `ADR02` | `B` | `UJ` | `-R2` --- | --- | --- | --- **Series:** 5V Reference | **Grade:** High Precision (B) | **Package:** TSOT-5 | **Packing:** 7" Tape & Reel (250 units)