## ADR5041ARTZ-R2: Electronic Technical Overview The **ADR5041ARTZ-R2** is a high-precision shunt mode voltage reference designed for space-constrained applications. It is manufactured by Analog Devices and belongs to the ADR504x family of sub-bandgap voltage references. --- ### 1. Key Specifications The following table highlights the primary electrical characteristics of the component: | Parameter | Value/Rating | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 2.500 V | | **Initial Accuracy** | ±0.2% (Grade A) | | **Temperature Coefficient** | 100 ppm/°C | | **Operating Current Range** | 50 µA to 15 mA | | **Package Type** | SOT-23-3 | | **Operating Temperature** | -40°C to +125°C | | **Output Noise (0.1Hz to 10Hz)** | 125 µV p-p | --- ### 2. Functional Description The ADR5041 operates as a **Shunt Reference** (similar to a Zener diode). It maintains a stable voltage by "shunting" excess current to the ground through an external resistor ($R_{bias}$). #### Core Components: 1. **Sub-bandgap Reference Core:** Utilizes the predictable behavior of transistors to create a stable voltage that is less sensitive to temperature changes. 2. **Internal Compensation:** Includes internal capacitors to ensure stability without requiring an external output capacitor, though one can be added to reduce noise. 3. **Thermal Shutdown:** Protects the device from damage if the current exceeds the maximum rating. --- ### 3. Circuit Implementation To use the ADR5041, you must calculate the value of the input resistor ($R_{set}$) to ensure the device operates within its 50 µA to 15 mA current window. #### Basic Schematic Logic: ```text Input Voltage (Vin) | [Rset] | +------> Output Voltage (2.5V) | [ADR5041] | GND ``` #### Calculation Formula: $$R_{set} = \frac{V_{in} - V_{out}}{I_{load} + I_{q}}$$ *Where $I_q$ is the operating current of the ADR5041 (typically set to > 50 µA).* --- ### 4. Typical Applications * **Precision Data Acquisition:** Providing the reference voltage for 12-bit or 14-bit ADCs. * **Battery Powered Equipment:** Due to its low minimum operating current (50 µA), it preserves battery life. * **Industrial Process Control:** Reliable performance across wide temperature ranges (-40°C to 125°C). * **Instrumentation:** Used in handheld meters where PCB space is limited.