ADM7151ARDZ-04

Overview

The ADM7151ARDZ-04 is an adjustable ultralow noise, high PSRR RF linear regulator from Analog Devices. It operates with an input voltage range of 4.5 V to 16 V and delivers a maximum output current of 800 mA. The output voltage is adjustable between 1.5 V and 5.1 V using external resistors. Key electrical specifications include a quiescent current of 4.3 mA at no load, a shutdown current of 0.1 µA, and a typical power supply rejection ratio exceeding 90 dB from 1 kHz to 100 kHz at a 400 mA load. Initial voltage accuracy is ±1%, expanding to ±2% over line, load, and temperature variations.

Feature Summary

• Ultralow noise performance with 1.7 nV/√Hz spectral density from 10 kHz to 1 MHz
• High power supply rejection ratio (PSRR) exceeding 90 dB across a wide frequency range
• Optimized for stability with low-ESR ceramic output capacitors
• Low shutdown current consumption for efficient power management

Applications

• RF mixers, phase-locked loops (PLLs), and voltage-controlled oscillators (VCOs)
• Clock distribution circuits
• Ultrasound and other imaging applications
• High-speed RF transceivers
• Communications and infrastructure systems

Procurement Notes

Verify the specific ordering suffix matches the required output voltage configuration before procurement. Confirm package availability aligns with PCB layout requirements. Ensure component authenticity through authorized channels. Check datasheet revisions for any updates to electrical characteristics or pin configurations prior to final design integration.

Selection Notes

Select this model when optimizing for higher input-to-output voltage differentials compared to lower voltage variants. Verify that the application requires an adjustable output within the 1.5 V to 5.1 V range. Consider thermal dissipation capabilities based on the expected load current and ambient operating conditions. Ensure the input voltage remains within the specified 4.5 V to 16 V operational limits.

Part Context

This component belongs to the ADM7151 series of ultralow noise linear regulators designed specifically for radio frequency applications. The series offers two primary models tailored to different input/output voltage combinations to minimize power dissipation while maintaining high PSRR. The ADM7151ARDZ-04 variant is optimized for applications requiring higher headroom voltage margins.

Replacement Considerations

Direct replacements within the same family include the ADM7151ARDZ-02, which is optimized for lower output voltages such as 4 V. Ensure the substitute part number matches the required output voltage setting and package type to maintain circuit compatibility.