ADM7151ARDZ-02

Overview

The ADM7151ARDZ-02 is an ultralow noise, high PSRR RF linear regulator from Analog Devices. It delivers up to 800 mA of output current with an input voltage range of 4.5 V to 16 V. The adjustable output voltage spans from 1.5 V to 4 V. Key electrical parameters include a typical quiescent current of 4.3 mA at no load and a shutdown current of 0.1 µA. Initial voltage accuracy is ±1%, with line regulation at 0.01 %/V and load regulation at 0.5 %/A. Dropout voltage reaches 1.2 V maximum at full load.

Feature Summary

• Ultralow noise performance with 1.7 nV/√Hz spectral density from 10 kHz to 1 MHz
• High power supply rejection ratio exceeding 90 dB from 1 kHz to 100 kHz
• Optimized for stability with low-ESR ceramic output capacitors
• Low shutdown current consumption of 0.1 µA

Applications

• RF mixers and phase-locked loops (PLLs)
• Voltage-controlled oscillators (VCOs)
• Clock distribution circuits
• Ultrasound and imaging applications
• High-speed RF transceivers

Procurement Notes

Verify the specific -02 suffix indicates the 1.5 V to 4 V adjustable output range configuration. Confirm package availability matches the required 8-lead SOIC or LFCSP form factor. Ensure component authenticity through authorized distributors to avoid counterfeit risks associated with high-performance analog devices.

Selection Notes

Select this model when the application requires an output voltage between 1.5 V and 4 V. It is suitable for designs needing high PSRR in the 1 kHz to 100 kHz range. Consider thermal dissipation limits if operating near the maximum 800 mA current rating. Verify that the input voltage remains within the 4.5 V to 16 V operational window.

Part Context

This component belongs to the ADM7151 series of ultralow noise linear regulators designed for radio frequency applications. It features a P-channel MOSFET pass transistor controlled by an error amplifier. The device integrates an internal active ripple filter to isolate the low-noise LDO from input voltage noise, ensuring stable operation in sensitive RF environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.