ADP7118ARDZ-R7

Overview

The ADP7118ARDZ-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 typical quiescent current of 50 μA with no load and a shutdown current as low as 1.8 μA. It delivers an ultralow output noise of 11 μV rms for fixed options of 5 V or less. Power supply rejection ratios reach 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz. The component includes precision enable functionality, user-programmable soft start in specific packages, and protection against overcurrent and thermal overload.

Feature Summary

• Ultralow output noise performance independent of fixed output voltage
• High power supply rejection ratio across wide frequency ranges
• Precision enable pin with programmable logic thresholds
• User-programmable soft start capability via external capacitor

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering ADC and DAC circuits along with precision amplifiers
• Providing power for VCO VTUNE control applications
• Communications and infrastructure systems
• Medical and healthcare equipment requiring stable rails

Procurement Notes

Verify the exact ordering suffix matches the required package type and output voltage configuration. Confirm that the R7 suffix corresponds to the reel packaging format intended for your assembly line. Ensure the part number aligns with the specific voltage option needed, as multiple variants exist within the ADP7118 family. Cross-reference the manufacturer's latest datasheet revision to confirm all electrical specifications remain unchanged.

Selection Notes

Select this regulator when high input voltages up to 20 V must be stepped down to low noise rails. It is suitable for portable equipment due to its low quiescent current consumption. Consider the available packages, such as LFCSP or SOIC, based on thermal requirements and board space constraints. Verify that the application can accommodate the minimum recommended ceramic capacitance for stability.

Part Context

This component belongs to the ADP7118 series of low dropout regulators designed for high-performance analog applications. The series offers various fixed output voltage options ranging from 1.2 V to 5.0 V. It is supported by the ADIsimPower design tool for schematic generation and performance optimization. The device is qualified for automotive applications under AEC-Q100 standards.

Replacement Considerations

Direct substitutes include other ADP7118 variants with different output voltages or packages, such as ADP7118ACPZN3.3-R7 or ADP7118WAUJZ-5.0-R7.