ADP7157ARDZ-02-R7

Overview

The ADP7157ARDZ-02-R7 is an adjustable linear regulator from Analog Devices, operating within a 2.3 V to 5.5 V input range and delivering up to 1.2 A of output current. It provides an adjustable output voltage between 1.2 V and 3.3 V with high precision. The device features ultralow noise characteristics, including 0.9 µV rms typical output noise from 100 Hz to 100 kHz and 1.7 nV/√Hz spectral density from 10 kHz to 1 MHz. It offers high power supply rejection ratio (PSRR) performance, reaching 72 dB from 1 kHz to 100 kHz at specific operating conditions. The regulator maintains stability using only a 10 µF ceramic output capacitor and includes a precision enable function.

Feature Summary

• Ultralow noise architecture designed for sensitive RF applications
• High power supply rejection ratio across wide frequency ranges
• Precision enable pin for controlled startup and shutdown
• Stable operation with minimal external ceramic capacitance

Applications

• Phase-locked loops (PLLs)
• Voltage controlled oscillators (VCOs)
• Backhaul and microwave links

Procurement Notes

Verify the exact ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature rating. Confirm that the -02 variant matches the required output voltage range specifications for the target application. Cross-reference the datasheet revision history to validate all electrical parameters before finalizing procurement decisions.

Selection Notes

Select this component when designing circuits requiring low noise regulation for RF signals. Ensure the input voltage remains within the specified 2.3 V to 5.5 V range while maintaining adequate headroom. Consider thermal dissipation requirements given the 1.2 A maximum load capability and available package options. Verify compatibility with the ADIsimPower design tool for optimal circuit configuration.

Part Context

This part belongs to the ADP7157 family of ultralow noise linear regulators manufactured by Analog Devices. The series includes variants optimized for different input-to-output voltage ratios to minimize power dissipation. Related components in the portfolio include fixed-output versions and higher current models like the ADP7158 and ADP7159.

Replacement Considerations

The ADP7156 serves as a functional alternative within the same family offering similar current capabilities.