The **REF02DP** is a precision voltage reference integrated circuit (IC) that provides a stable +5.0V output. It is widely used in applications requiring high accuracy and low temperature drift. --- ### 1. Key Technical Specifications The "DP" suffix typically indicates a specific package type (PDIP) and a specific grade of performance. Below are the primary technical parameters: | Parameter | Specification (Typical) | | :--- | :--- | | **Output Voltage** | +5.0 V | | **Input Voltage Range** | 7.0 V to 40 V | | **Temperature Drift** | 10 ppm/°C to 25 ppm/°C | | **Output Current** | 10 mA (Max) | | **Supply Current** | 1 mA | | **Package Type** | 8-pin Plastic DIP (PDIP) | | **Operating Temp Range** | 0°C to +70°C (Commercial) | --- ### 2. Functional Features The REF02DP is more than just a fixed voltage regulator; it includes several specialized features: * **TEMP Pin (Pin 3):** This pin outputs a voltage proportional to the absolute temperature (approx. 2.1 mV/°C). It can be used as a temperature sensor. * **TRIM Pin (Pin 5):** This allows the user to fine-tune the output voltage (usually by ±3%) using a potentiometer to account for system-level errors. * **High Line/Load Rejection:** It maintains a steady 5V output even if the input voltage fluctuates or the load current changes. * **Short-Circuit Protection:** The device is designed to withstand a continuous short to ground. --- ### 3. Pin Configuration (8-Pin PDIP) ```text +---U---+ NC | 1 8 | NC Vin | 2 7 | NC TEMP | 3 6 | Vout GND | 4 5 | TRIM +-------+ ``` --- ### 4. Common Applications The REF02DP is primarily found in precision measurement systems: 1. **A/D and D/A Converters:** Provides the reference baseline for converting signals between analog and digital formats. 2. **Digital Voltmeters:** Ensures the accuracy of the readings. 3. **Current Sources:** Used as a stable voltage base to create constant current circuits. 4. **Temperature Measurement:** Utilizing the TEMP pin for environmental monitoring.