The **ADR5041ARTZ-R2** is a precision shunt mode voltage reference manufactured by Analog Devices. It is designed for space-constrained applications requiring high accuracy and low power consumption. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 2.500 V | | **Initial Accuracy** | ±0.1% (Grade A) | | **Temperature Coefficient** | 100 ppm/°C | | **Operating Current Range** | 50 µA to 15 mA | | **Package Type** | SOT-23-3 (RT-3) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Functional Characteristics * **Shunt Topology:** Unlike series references, this device operates like a Zener diode. It maintains a constant voltage across its terminals by varying the amount of current it shunts to ground. * **No Output Capacitor Required:** The ADR5041 is stable without an external output capacitor, which saves PCB space and reduces costs. However, it remains stable even if capacitive loads up to 1 µF are added. * **Low Power:** With a minimum operating current of only 50 µA, it is ideal for battery-powered handheld devices. --- ### 3. Pin Configuration (SOT-23) | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **K (Cathode)** | The positive terminal of the reference. | | 2 | **A (Anode)** | The negative terminal (usually connected to ground). | | 3 | **NC** | No internal connection. Leave floating or connect to Anode. | --- ### 4. Typical Application Circuit To use the ADR5041, a resistor ($R_{set}$) must be placed between the input voltage supply ($V_{in}$) and the Cathode pin to limit the current. ```text V_in ----[ R_set ]----+---- V_out (2.5V) | [ADR5041] | GND ``` **Formula for $R_{set}$:** $$R_{set} = \frac{V_{in} - V_{out}}{I_{load} + I_{quiescent}}$$ --- ### 5. Common Applications * **ADC/DAC Reference:** Providing a stable voltage for 8-bit to 12-bit converters. * **Precision Current Sources:** Used in sensor excitation circuits. * **Portable Instrumentation:** Due to the small SOT-23 footprint and low power draw. * **Industrial Process Control:** Reliable performance across wide temperature ranges.