## Overview of ADR5045ARTZ-R2 The **ADR5045ARTZ-R2** is a high-precision, shunt-mode voltage reference manufactured by **Analog Devices**. It is designed for space-constrained applications that require a stable voltage output with low power consumption. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 5.0 V | | **Tolerance (Initial Accuracy)** | ±0.1% (Grade A) | | **Temperature Coefficient** | 75 ppm/°C | | **Operating Current Range** | 50 µA to 15 mA | | **Package Type** | SOT-23-3 | | **Operating Temperature** | -40°C to +125°C | | **Output Noise** | 240 µV p-p (0.1 Hz to 10 Hz) | --- ### 2. Functional Characteristics #### Shunt Configuration Unlike series references, the ADR5045 operates as a **shunt reference** (similar to a Zener diode). This means it maintains a constant voltage by "shunting" excess current to ground. This makes it highly versatile for: * Negative voltage references. * Applications with high or fluctuating supply voltages. #### Stability and Precision * **No Output Capacitor Required:** It is designed to be stable without an external output capacitor, saving PCB space and reducing costs. However, it remains stable even if capacitive loads are added. * **Low Power Consumption:** With a minimum operating current of only 50 µA, it is ideal for battery-powered handheld devices. --- ### 3. Pin Configuration | Pin Number | Name | Function | | :--- | :--- | :--- | | **1** | **K** | Cathode (Positive Terminal) | | **2** | **A** | Anode (Negative Terminal/Ground) | | **3** | **NC** | No Connect (Should be left floating) | --- ### 4. Typical Application Circuit To use the ADR5045, a series resistor ($R_s$) is required to limit the current entering the device. ```text Input Voltage (Vin) | [ Rs ] <-- Series Resistor | +----------o Output Voltage (5.0V) | | [ K ] [Load] ADR5045 | [ A ] | | | Ground ---- Ground ``` --- ### 5. Common Applications * **Data Acquisition Systems:** Providing a stable reference for ADC (Analog-to-Digital Converters). * **Industrial Process Control:** Precise sensor calibration. * **Battery Monitoring:** Low drift reference for voltage level detection. * **Precision Instrumentation:** Portable measurement tools.