REF35

The REF35 is a precision voltage reference IC manufactured by Texas Instruments, designed for high accuracy and stability in demanding electronic systems. It provides a tightly regulated output voltage of 3.0 V with a maximum initial accuracy of ±0.1%, ensuring reliable performance across varying environmental conditions. The device features low temperature drift, typically less than 5 ppm/°C, which minimizes output variation over a wide operating temperature range from –40°C to +125°C. This voltage reference offers excellent line and load regulation, maintaining stable output under varying input supply voltages and load currents. Its quiescent current is as low as 70 µA, making it ideal for battery-powered or energy-sensitive applications where power efficiency is critical. The REF35 also exhibits low noise performance, with an output noise density of approximately 10 µV/√Hz at 1 kHz, suitable for precision analog circuits such as data converters and sensor interfaces. The internal bandgap architecture ensures long-term stability and minimal aging effects, while the device includes built-in protection against reverse polarity and short-circuit conditions, enhancing system robustness. Available in a compact SO-8 surface-mount package, the REF35 supports easy integration into modern PCB designs without requiring additional external components for basic operation. It is commonly used in industrial instrumentation, medical devices, portable test equipment, and automotive systems where consistent and accurate reference voltages are essential for measurement integrity. Applications include ADCs, DACs, sensor signal conditioning, and power management circuits that demand precise voltage references to maintain accuracy and reduce calibration overhead. The REF35’s combination of low power, high precision, and robust design makes it a preferred choice for engineers seeking reliable performance in space-constrained and high-reliability environments.