ADM7151ARDZ-02-R7

Overview

The ADM7151ARDZ-02-R7 is an 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 adjustable output voltage spans from 1.5 V to 4 V. Key electrical parameters 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%, with line regulation at 0.01 %/V and load regulation at 0.5 %/A.

Feature Summary

• Ultralow noise performance with integrated RMS noise values of 1.0 μV rms (100 Hz to 100 kHz) and spectral density of 1.7 nV√Hz (10 kHz to 1 MHz).
• High power supply rejection ratio (PSRR) exceeding 90 dB across a wide frequency band for effective ripple filtering.
• Optimized stability with standard 10 μF ceramic output capacitors, ensuring excellent transient response under varying loads.

Applications

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

Procurement Notes

Verify the specific -02 suffix configuration against the official datasheet to confirm the output voltage range matches system requirements. Ensure input and output capacitor selections adhere to the minimum capacitance specifications outlined in the documentation. Confirm package availability and thermal constraints during the design phase.

Selection Notes

Select this component when low noise and high PSRR are critical for sensitive RF or analog circuitry. The -02 model variant is specifically optimized for lower output voltages compared to the -04 model. Evaluate thermal dissipation capabilities based on the difference between input and output voltages at the maximum expected load current.

Part Context

This device 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 series offers two models to optimize power dissipation and PSRR performance based on specific input and output voltage combinations.

Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.