## Overview of the ADR02BUJZ-R2 The **ADR02BUJZ-R2** is a high-precision, low-drift band gap voltage reference produced by **Analog Devices**. It is part of the ADR02 series, which is widely recognized for its stability and low noise, making it ideal for high-resolution data conversion systems. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 5.0 V | | **Input Voltage Range ($V_{in}$)** | 7.0 V to 36.0 V | | **Initial Accuracy** | ±0.1% (Max) | | **Temperature Coefficient** | 9 ppm/°C (Max) | | **Output Current Capability** | 10 mA (Source), -5 mA (Sink) | | **Quiescent Current** | 650 µA (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | TSOT-23-5 (Thin SOT) | --- ### 2. Functional Description The ADR02BUJZ-R2 utilizes a patented temperature drift curvature correction technique and an advanced ion-implanted buried Zener diode. This allows the component to overcome the stability issues typically associated with conventional band gap references. #### Internal Features: * **High Stability:** Extremely low long-term drift (approx. 50 ppm/1000 hours). * **Wide Input Range:** It can handle up to 36V, providing flexibility in industrial power rails. * **Trim Terminal:** The device includes a "TRIM" pin (Pin 5), allowing users to fine-tune the output voltage slightly if precise calibration is required. --- ### 3. Pin Configuration (TSOT-23-5) | Pin Number | Mnemonic | Description | | :--- | :--- | :--- | | 1 | **$V_{in}$** | Input Voltage Supply | | 2 | **GND** | Ground | | 3 | **NC** | No Internal Connection | | 4 | **$V_{out}$** | Reference Output Voltage (5.0V) | | 5 | **TRIM** | Output Voltage Adjustment | --- ### 4. Typical Application Circuit To ensure the best performance, decoupling capacitors are recommended at both the input and output. ```c // Example Layout Schematic Concept [Input 7-36V] ----+---- [Pin 1: Vin] | [0.1uF Cap] | [GND] [Pin 4: Vout] ----+---- [Output 5.0V] | [0.1uF to 10uF Cap] | [GND] ``` --- ### 5. Common Applications * **Precision Data Acquisition:** Used as a reference for 12-bit to 16-bit ADCs/DACs. * **Industrial Process Control:** Reliable voltage standards for PLC analog modules. * **Instrumentation:** Portable medical devices and high-accuracy multimeters. * **Smart Sensors:** Providing a stable excitation voltage for pressure or strain sensors. ---