## Technical Overview of ADR130AUJZ-R2 The **ADR130AUJZ-R2** is a precision, low-power, low-voltage band gap voltage reference manufactured by **Analog Devices**. It is specifically designed for high-accuracy applications where space and power consumption are critical constraints. --- ### Key Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{out}$)** | 1.0 V | | **Input Voltage Range** | 2.0 V to 18 V | | **Initial Accuracy** | ±0.35% (max) | | **Temperature Coefficient** | 50 ppm/°C | | **Supply Current** | 150 µA (max) | | **Package Type** | TSOT-23-5 (UJ-5) | | **Operating Temperature** | -40°C to +125°C | --- ### Functional Features 1. **Low Dropout Voltage:** It requires very little "headroom" between the input and output voltages, allowing it to function effectively in battery-powered systems. 2. **High Stability:** Despite its small size, it maintains a stable 1.0V output over a wide range of temperatures and input fluctuations. 3. **No External Capacitor Required:** While many references require a large output capacitor for stability, the ADR130 is stable with or without capacitive loads, saving PCB real estate. 4. **Shutdown Mode:** This specific part includes a "SET" or shutdown functionality in certain configurations to further reduce power consumption when the reference is not needed. --- ### Pin Configuration (TSOT-23-5) | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **DNC** | Do Not Connect (Internal use) | | 2 | **GND** | Ground | | 3 | **SET** | Output adjustment or Shutdown | | 4 | **$V_{in}$** | Input Voltage Supply | | 5 | **$V_{out}$** | Reference Voltage Output (1.0V) | --- ### Typical Applications * **Precision Data Converters:** Acts as a stable reference for 12-bit or 14-bit ADCs/DACs. * **Battery-Powered Instrumentation:** Due to the 150 µA low current draw. * **Portable Medical Devices:** Where small form factor (TSOT-23) is essential. * **Smart Transmitters:** Used in industrial 4-20mA loops. --- ### Example Implementation To use the ADR130 in a basic circuit, follow this general connection scheme: ```c // Schematic Logic [Input Voltage 2V-18V] ----> Pin 4 (Vin) [Common Ground] ----------> Pin 2 (GND) [Output 1.0V] <----------- Pin 5 (Vout) // Optional: 0.1uF bypass capacitor on Pin 4 to GND for noise reduction. ```