## ADR5044BKSZ-R2: Electronic Component Overview The **ADR5044BKSZ-R2** is a high-precision, low-power **Shunt Mode Voltage Reference**. It is designed by Analog Devices and belongs to the ADR504x family. It functions similarly to a Zener diode but offers significantly higher stability and tighter tolerances. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{OUT}$)** | 4.096 V | | **Initial Accuracy** | ±0.2% (Grade B) | | **Temperature Coefficient** | 75 ppm/°C | | **Operating Current Range** | 50 µA to 15 mA | | **Package Type** | SC70-3 (SOT-323) | | **Operating Temperature** | -40°C to +125°C | | **Output Noise** | 240 µV p-p (0.1 Hz to 10 Hz) | --- ### 2. Core Functional Features * **Shunt Topology:** Unlike series references, this part acts as a variable resistor to ground to maintain a constant voltage across its terminals. It requires an external resistor ($R_{SET}$) to limit the input current. * **No Output Capacitor Required:** The device is designed to be stable without an external output capacitor, which saves PCB space, though one can be added for improved noise performance. * **Low Operating Current:** It can operate with as little as 50 µA, making it ideal for battery-powered handheld devices. * **Fixed Output:** The 4.096V output is specifically chosen because it simplifies calculations in Digital-to-Analog (DAC) and Analog-to-Digital (ADC) systems (where $4.096V / 2^{12} = 1mV$ per LSB). --- ### 3. Basic Application Circuit To use the ADR5044, you must calculate the value of the dropper resistor ($R_{S}$) to ensure the device stays within its current limits (50 µA to 15 mA). ```text Input Voltage (Vin) | [ Rs ] |---------- Output (4.096V) | | [ADR5044] [Load] | | GND GND ``` **Calculation Formula:** $R_S = \frac{V_{IN} - V_{OUT}}{I_{L} + I_{Q}}$ *Where $I_L$ is the load current and $I_Q$ is the reference operating current.* --- ### 4. Common Applications 1. **Precision Data Acquisition:** Providing a stable reference for 12-bit or 14-bit ADCs. 2. **Portable Instrumentation:** Due to the small SC70 footprint and low power consumption. 3. **Industrial Process Control:** Used in 4-20mA loop-powered transmitters. 4. **Space-Constrained Electronics:** The SC70 package is approximately 50% smaller than the standard SOT-23.