## Overview of ADR5044AKSZ-R2 The **ADR5044AKSZ-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 The following table summarizes the primary electrical characteristics of the device: | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 4.096 V | | **Initial Accuracy** | ±0.1% (Grade A) | | **Temperature Coefficient** | 100 ppm/°C | | **Operating Current Range** | 50 µA to 15 mA | | **Package Type** | SC70 (3-lead) | | **Operating Temperature** | -40°C to +125°C | | **Output Noise (0.1 to 10 Hz)** | 240 µV p-p | --- ### 2. Core Functional Features * **Shunt Architecture:** Unlike series references, this device operates like a Zener diode. It maintains a constant voltage across its terminals by varying the current it draws. * **No Output Capacitor Required:** The ADR5044 is stable without an external output capacitor, which saves board space and reduces BOM (Bill of Materials) costs. * **Low Minimum Operating Current:** With a minimum requirement of only **50 µA**, it is ideal for battery-powered handheld devices. * **Precision Fixed Output:** The 4.096 V output is specifically chosen because it simplifies calculations in Digital-to-Analog (DAC) and Analog-to-Digital (ADC) converters (where $1 LSB$ becomes a round binary number). --- ### 3. Pin Configuration (SC70-3) | Pin No. | Name | Function | | :--- | :--- | :--- | | 1 | **V+** | Positive terminal (Output/Supply) | | 2 | **V-** | Negative terminal (Ground) | | 3 | **NC** | No Connect (Leave floating) | --- ### 4. Typical Application Circuit To use the ADR5044, an external resistor ($R_{set}$) is required to limit the current flowing into the device. ```text Input Voltage (Vin) | [R_set] | +---------- Output (4.096V) | | [ADR5044] [Load] | | GND GND ``` **Calculation for $R_{set}$:** $$R_{set} = \frac{V_{in} - V_{out}}{I_{load} + I_{q}}$$ *(Where $I_{q}$ is the operating current for the reference, typically 50µA to 15mA).* --- ### 5. Common Applications * Portable Instrumentation * Precision Data Acquisition Systems * Battery-powered Equipment * Industrial Process Controls