ADP7157ACPZ-01-R7

Overview

The ADP7157ACPZ-01-R7 is an adjustable RF 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 load current. It features ultralow noise performance, with typical output noise of 0.9 µV rms (100 Hz to 100 kHz) and 1.7 nV/√Hz spectral density (10 kHz to 1 MHz). The device offers high power supply rejection ratio (PSRR), achieving 70 dB at 1 kHz to 100 kHz and 52 dB at 1 MHz for the -01 model. It provides an adjustable output voltage range from 1.2 V to 3.3 V with initial accuracy of ±0.6%. Packaged in a compact 10-lead, 3 mm × 3 mm LFCSP, it supports stable operation with only a 10 µF ceramic output capacitor.

Feature Summary

• Ultralow noise architecture optimized for sensitive RF applications
• High power supply rejection ratio across wide frequency ranges
• Precision enable control with low shutdown current consumption
• Stable operation using standard ceramic capacitors

Applications

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

Procurement Notes

Verify the specific suffix '-01' corresponds to the required input/output voltage optimization for your design, as the ADP7157 family includes models tailored for different headroom conditions. Confirm the LFCSP-10 package availability and ensure compliance with moisture sensitivity level requirements during storage and soldering processes. Cross-reference the datasheet revision B specifications against your bill of materials to guarantee parameter alignment.

Selection Notes

Select this component when designing noise-sensitive analog or RF circuits requiring high PSRR and significant current drive. The -01 variant is specifically optimized for lower input-to-output voltage differentials compared to other models in the series. Ensure the application maintains the minimum 10 µF ceramic output capacitance to guarantee stability and transient response performance under varying load conditions.

Part Context

This part belongs to the ADP7157 family of high PSRR, RF linear regulators manufactured by Analog Devices. It complements fixed-output variants like the ADP7158 and higher-current options such as the ADP7159. The family shares a common advanced proprietary architecture designed to minimize power dissipation while maintaining excellent line and load transient responses in compact surface-mount packages.

Replacement Considerations

Direct substitutes include other ADP7157 models (-02, -03, -04) if the input/output voltage headroom differs. For fixed output requirements, consider the ADP7158. Higher current needs may require the ADP7159. Verify pin compatibility and thermal characteristics when transitioning between these related devices.