### ADR3625ARMZ-R7: Technical Overview The **ADR3625ARMZ-R7** is a high-precision, low-power, low-noise voltage reference integrated circuit (IC) manufactured by **Analog Devices**. It is designed for applications requiring high stability and accuracy over a wide temperature range. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage ($V_{OUT}$)** | 2.5 V | | **Initial Accuracy** | ±0.1% (B Grade) | | **Temperature Coefficient** | 25 ppm/°C (max) | | **Input Voltage Range** | 2.8 V to 15 V | | **Output Current Drive** | Source: 5 mA / Sink: 1 mA | | **Supply Current** | 190 µA (max) | | **Package Type** | 8-Lead MSOP (ARMZ) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Functional Characteristics * **Low Noise:** This part is optimized for low-frequency noise (typically $9.4 \mu V_{p-p}$ from 0.1 Hz to 10 Hz), which is critical for high-resolution Data Converters (ADCs/DACs). * **Low Dropout:** It can operate with a very small difference between input and output voltage (300 mV), allowing it to work in battery-powered systems. * **Nano-amp Power Down:** While active current is low, it is designed for efficiency in power-sensitive designs. * **Stability:** It is stable with a wide range of output capacitances (0.1 µF to 10 µF), making it versatile for different PCB layouts. --- ### 3. Application Use Cases 1. **Precision Data Acquisition:** Providing a stable reference for 12-bit to 16-bit Analog-to-Digital Converters (ADCs). 2. **Industrial Instrumentation:** Used in process control, smart transmitters, and handheld test equipment. 3. **Medical Equipment:** High-stability requirements in diagnostic devices. 4. **Automotive Systems:** Suitable for sensor signal conditioning due to its wide temperature range. --- ### 4. Part Number Breakdown (ADR3625ARMZ-R7) | Suffix | Meaning | | :--- | :--- | | **ADR3625** | Part Family (2.5V Reference) | | **A** | Performance Grade (Accuracy/Tempco) | | **RM** | Package Designator (MSOP) | | **Z** | RoHS Compliant (Lead-Free) | | **R7** | Packing Method (7-inch Tape and Reel, 1000 units) | --- ### 5. Typical Connection Diagram ```text Input (2.8V - 15V) | +------|------+ | [VIN] | | | | ADR3625 |---- [VOUT] (2.5V Stable) | | | | [GND] | [C_load] (0.1uF) +------|------+ | | GND GND ```