**REF195ESZ: A Comprehensive Analysis of the 5V Precision Voltage Reference**

In the realm of precision analog and mixed-signal circuit design, the stability and accuracy of a voltage reference are paramount. The **REF195ESZ** from Analog Devices stands as a quintessential component in this category, providing a **highly stable and precise 5V output** that serves as a critical foundation for data converters, precision sensors, and measurement equipment.

This voltage reference distinguishes itself through its exceptional initial accuracy of ±0.06% (max) and an impressively low temperature drift of **3ppm/°C (max)**. Such specifications ensure that the output voltage remains consistently close to the ideal 5V value across a wide operating temperature range, a critical factor for systems operating in non-laboratory environments. Furthermore, the device features **low noise performance**, typically just 5µVp-p from 0.1Hz to 10Hz, which is essential for maintaining signal integrity in high-resolution data acquisition systems.

A key operational advantage of the REF195ESZ is its ability to both source and sink current. Unlike many references that can only source current, the REF195 can **source up to 30mA and sink up to 20mA**. This unique capability allows it to actively pull a load down to its regulated voltage, making it exceptionally versatile. It can often replace a secondary regulator in a system, simplifying design and saving board space. Its low dropout voltage of just **350mV (max)** further enhances its utility, enabling stable operation even when the supply voltage dips close to 5.35V.

The device is offered in a stable 8-lead SOIC package, which is robust and suitable for a wide range of industrial and automotive applications. It requires a minimal bypass capacitor for stability, typically just a 0.1µF ceramic capacitor on the output, which contributes to a simple and reliable implementation.

**ICGOOODFIND**: The REF195ESZ is more than just a voltage reference; it is a **high-accuracy, high-output-drive component** that combines precision, versatility, and robustness. Its ability to source and sink significant current sets it apart, making it an ideal choice for designers seeking to simplify their system architecture while achieving the highest levels of performance.

**Keywords**: Precision Voltage Reference, Low Temperature Drift, High Output Drive, Low Dropout Voltage, Low Noise