**ADP7104ARDZ-5-R7: A 5V, 500mA Low-Noise LDO Regulator for Precision Analog Applications**
In the realm of precision analog design, power integrity is paramount. Sensitive components such as high-resolution ADCs, DACs, precision amplifiers, and oscillators demand a clean, stable, and noise-free supply voltage to achieve their specified performance. The **ADP7104ARDZ-5-R7** from Analog Devices stands out as a premier solution, engineered specifically to meet the stringent requirements of these noise-sensitive applications.
This low-dropout (LDO) linear regulator provides a fixed **5.0V output** from an input voltage range of 3.3V to 20V, delivering up to **500mA of continuous output current**. Its key differentiator lies in its exceptionally low output noise performance. The ADP7104 achieves an ultra-low output noise of **4.8 µVrms** (typical) over the 10 Hz to 100 kHz bandwidth. This is accomplished through an innovative design that integrates a high-performance bandgap reference and an error amplifier, minimizing the inherent noise generated by the regulator itself.
Furthermore, the device exhibits an outstanding **power supply rejection ratio (PSRR)** of up to 72 dB at 10 kHz. This high PSRR is critical as it enables the ADP7104 to effectively attenuate unwanted AC ripples and noise originating from the upstream switching power supply or other noisy sources on the input rail, preventing them from propagating to the sensitive load.
Beyond its noise performance, the ADP7104 is designed for robustness and accuracy. It features a low dropout voltage of 240 mV at 500 mA load, enhancing efficiency in low headroom scenarios. The initial output voltage accuracy is guaranteed to be within ±0.8%, ensuring a precise supply point. For system protection, the IC includes essential features like current limiting and thermal shutdown. Its compact **3 mm × 3 mm LFCSP package** offers an excellent thermal performance footprint, making it suitable for space-constrained PCB layouts common in modern analog systems.
Typical applications span a wide array of high-performance equipment, including medical imaging devices, test and measurement instrumentation, industrial process control systems, and communications infrastructure, where clean power is non-negotiable.
**ICGOOODFIND:** The ADP7104ARDZ-5-R7 is an exceptional **ultra-low-noise LDO regulator** that provides a pristine 5V/500mA power rail. Its industry-leading **noise and PSRR performance** make it an indispensable component for powering the most demanding precision analog and RF circuits, directly contributing to enhanced signal integrity and overall system accuracy.
**Keywords:** Low-Noise LDO, Precision Analog, PSRR, 500mA Regulator, ADP7104
