Introducing the ADR421AR Voltage Reference from Analog Devices Inc.

The ADR421AR is a high-precision voltage reference component from the renowned manufacturer Analog Devices Inc., designed to offer a stable and accurate reference voltage for various applications. This precision voltage reference is part of the ADR42x series, which has been engineered to provide the optimal balance between performance and cost, making it an excellent choice for both high-end and cost-sensitive applications.

The ADR421AR features an output voltage of 2.5V with an impressive temperature coefficient of only 3 ppm/°C (max) over the full industrial temperature range of -40°C to +125°C. This ensures that the device maintains a consistent output voltage despite fluctuations in ambient temperature, which is crucial for precision applications.

With a low dropout voltage of 300 mV (max) and a wide input voltage range from 4 V to 18 V, the ADR421AR provides great flexibility in design. This allows it to be used in systems with varying power supply conditions without compromising its performance. Additionally, the device boasts a low quiescent current of 750 µA (max), which makes it suitable for battery-powered equipment and other power-sensitive applications.

The ADR421AR is equipped with a trim terminal that enables fine adjustment of the output voltage. This feature allows designers to calibrate the voltage reference to a specific value or compensate for system errors, providing even greater precision in their applications.

For enhanced reliability, the ADR421AR incorporates a patented temperature drift curvature correction circuit and a noise reduction pin that can be used to further reduce the output noise level. This makes it an ideal choice for high-resolution analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other sensitive electronic components that require a low-noise, stable reference voltage.

The device is offered in an 8-lead SOIC package, ensuring compatibility with standard PCB layouts and easy integration into a wide range of products. Whether it's for data acquisition systems, industrial instrumentation, or precision power supplies, the ADR421AR from Analog Devices Inc. stands out as a robust and reliable voltage reference solution.