ADP7118ACPZN1.8-R7

Overview

The ADP7118ACPZN1.8-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc. It operates from an input voltage range of 2.7 V to 20 V and provides up to 200 mA of output current. The device features a fixed 1.8 V output with an initial accuracy of ±0.8%. It delivers ultralow output noise of 11 µV rms and high power supply rejection ratios of 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz. The typical quiescent current is 50 µA with no load, and the shutdown current is 1.8 µA at VIN = 5 V. The device includes precision enable functionality and is housed in a 6-lead LFCSP package.

Feature Summary

• Ultralow output noise of 11 µV rms independent of fixed output voltage
• High power supply rejection ratio reaching 88 dB at 10 kHz
• Precision enable pin with user-programmable thresholds and hysteresis
• Stable operation with small 2.2 µF ceramic output capacitors

Applications

• Regulation for noise-sensitive applications
• ADC and DAC circuits
• Precision amplifiers
• Power for VCO VTUNE control
• Communications and infrastructure systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact output voltage option and packaging configuration. Ensure compatibility with the required thermal management solutions for the LFCSP package. Confirm that the selected component meets all environmental and reliability standards required for the intended deployment environment.

Selection Notes

Select this component when designing circuits requiring high PSRR and minimal output noise for sensitive analog or mixed-signal loads. The fixed 1.8 V output eliminates the need for external feedback resistors, simplifying the design. Consider the maximum input voltage limit of 20 V and the 200 mA current capability when sizing the power supply rails and thermal dissipation paths for the application.

Part Context

This part belongs to the ADP7118 family of low noise CMOS LDO regulators from Analog Devices. The series offers various fixed output voltages ranging from 1.2 V to 5.0 V, as well as adjustable options. The ADP7118 is designed for high-performance applications where clean power delivery is critical, supporting both industrial and automotive environments through AEC-Q100 qualification.

Replacement Considerations

Consult the official ADP7118 datasheet ordering guide for confirmed substitute part numbers within the same family. Verify that any replacement maintains the 1.8 V fixed output specification and compatible package footprint.