The **ADR364BUJZ-R2** is a high-precision, low-power, band gap voltage reference manufactured by **Analog Devices**. It is part of the ADR36x family, known for its small footprint and excellent thermal stability. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 4.096 V | | **Initial Accuracy** | ±0.1% (B Grade) | | **Temperature Coefficient** | 9 ppm/°C (max) | | **Input Voltage Range** | 4.3 V to 15 V | | **Quiescent Current** | 190 $\mu$A (max) | | **Output Current Drive** | 5 mA (source) / 2 mA (sink) | | **Operating Temperature** | -40°C to +125°C | | **Package** | 5-Lead TSOT-23 | --- ### 2. Core Functional Components The internal architecture of the ADR364 involves several critical electronic stages: 1. **Band Gap Core:** This is the heart of the chip. It uses the predictable behavior of bipolar transistors to create a stable reference voltage that is theoretically independent of temperature. 2. **Output Buffer:** A high-performance operational amplifier is integrated to provide low output impedance. This allows the device to drive loads (like an ADC's reference pin) without the voltage sagging. 3. **Trim Network:** During manufacturing, Analog Devices uses laser-trimming on internal resistors to adjust the output voltage to exactly 4.096 V and minimize temperature drift. 4. **Shutdown Pin:** This allows the part to be disabled electronically, reducing current consumption to less than 1 $\mu$A, which is ideal for battery-powered devices. --- ### 3. Application Use-Cases The specific output voltage of **4.096 V** is not accidental; it is mathematically significant for digital systems: * **Precision ADCs/DACs:** In a 12-bit converter, 4.096 V results in a clean LSB (Least Significant Bit) size of exactly **1 mV**. * **Portable Instrumentation:** Due to the TSOT package and low power draw. * **Process Control:** Used in industrial 4-20mA loops where high accuracy over temperature is required. --- ### 4. Part Number Breakdown The suffix provides specific ordering information: * **ADR364:** The model series (4.096 V output). * **B:** Grade (High Accuracy/Low Drift). * **UJZ:** Package code (TSOT-23). * **R2:** Packing code (7-inch reel, 250 units).