## ADR293TRUZ-EP-R7: Technical Overview The **ADR293TRUZ-EP-R7** is a precision, low-power, micropower voltage reference developed by Analog Devices. The "EP" designation indicates it belongs to the **Enhanced Product** family, designed for defense, aerospace, and high-reliability industrial applications. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Output Voltage** | 5.0 V | | **Input Voltage Range** | 6.0 V to 15.0 V | | **Initial Accuracy** | ±10 mV (Max) | | **Temperature Coefficient** | 30 ppm/°C (Max) | | **Supply Current** | 15 µA (Max) | | **Operating Temperature** | -55°C to +125°C (Extended Range) | | **Package Type** | 8-lead TSSOP | | **Output Current Drive** | 5 mA (Sink/Source) | --- ### 2. Core Functional Parts & Architecture The internal circuitry of the ADR293 series is based on a **XFET® (eXtra implanted junction FET)** architecture. This provides significant advantages over traditional Bandgap references: 1. **XFET Core:** Uses two junction field-effect transistors with different threshold voltages. This results in much lower noise and better long-term stability than Zener or Bandgap references. 2. **Low Dropout (LDO) Buffer:** The internal output buffer allows the device to maintain a stable 5V output even when the input voltage is only slightly higher (Low Dropout). 3. **Enhanced Reliability (EP):** * **Controlled Baseline:** One assembly site and one test site. * **Extended Temperature:** Tested and characterized for extreme environments. * **Gold Wire Bonds:** Typically used in EP parts for corrosion resistance. --- ### 3. Pin Configuration (8-Lead TSSOP) | Pin No. | Mnemonic | Description | |:---:|:---|:---| | 1 | TP | Test Point (Do not connect) | | 2 | VIN | Input Voltage Supply | | 3 | NC | No Connect | | 4 | GND | Ground | | 5 | NC | No Connect | | 6 | VOUT | Reference Voltage Output (5.0V) | | 7 | NC | No Connect | | 8 | NC | No Connect | --- ### 4. Part Number Breakdown Understanding the suffix nomenclature: * **ADR293:** Part Family (5V XFET Micropower Reference). * **TRUZ:** **T** (TSSOP package), **RU** (Package designator), **Z** (RoHS Compliant/Lead-free). * **EP:** Enhanced Product (Military/Aerospace grade quality). * **R7:** 7-inch Tape and Reel (1,000 units). --- ### 5. Application Areas * **Precision Data Acquisition:** Providing the reference for high-resolution ADCs. * **Battery-Powered Equipment:** Due to the extremely low 15 µA supply current. * **Avionics/Defense:** Used in environments with high temperature fluctuations. * **Remote Sensors:** Where power consumption and stability are critical.