## Overview of ADR5043BKSZ-R2 The **ADR5043BKSZ-R2** is a high-precision, shunt-mode voltage reference manufactured by **Analog Devices**. It is designed for space-constrained applications requiring high stability and low power consumption. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 3.0 V | | **Initial Accuracy** | ±0.1% (Grade B) | | **Temperature Coefficient** | 75 ppm/°C | | **Operating Current Range** | 50 µA to 15 mA | | **Package Type** | SC-70-3 (SOT-323) | | **Operating Temperature** | -40°C to +125°C | | **Output Noise** | 160 µV p-p (0.1 Hz to 10 Hz) | --- ### 2. Functional Characteristics * **Shunt Architecture:** Operates similarly to a Zener diode but with much higher precision. It maintains a constant voltage across its terminals by adjusting the current flowing through it. * **No Output Capacitor Required:** Unlike many voltage references, the ADR5043 is stable without an external output capacitor, saving PCB space. However, it remains stable even if capacitive loads up to 1 µF are used. * **Low Power Consumption:** With a minimum operating current of only 50 µA, it is ideal for battery-powered handheld devices. --- ### 3. Pin Configuration (SC-70) | Pin No. | Name | Function | | :--- | :--- | :--- | | 1 | **+** | Positive Terminal (Connect to load and resistor) | | 2 | **-** | Negative Terminal (Ground) | | 3 | **NC** | No Connect (Should be left floating or grounded) | --- ### 4. Typical Application Circuit To use the ADR5043, an external resistor ($R_{bias}$) must be placed between the input voltage supply and the reference. ```text V_in ---- [ R_bias ] ----+---- V_out (3.0V) | [ ADR5043BKSZ ] | Ground ``` **Calculation for $R_{bias}$:** $R_{bias} = \frac{V_{in(min)} - V_{out}}{I_{load(max)} + I_{shunt(min)}}$ --- ### 5. Common Applications * Portable/Battery-Powered Equipment. * Data Acquisition Systems (ADCs and DACs). * Precision Instrumentation. * Process Control Loops.