ADP7185ACPZN1.0-R7

Overview

The ADP7185ACPZN1.0-R7 is a negative low dropout linear regulator providing a fixed -1.0 V output with up to -500 mA load current capability. It operates from an input voltage range of -2.0 V to -5.5 V and features ultralow noise of 4 μV rms (100 Hz to 100 kHz). The device offers high power supply rejection ratio, reaching 68 dB at 10 kHz under full load. It includes positive or negative enable logic, thermal overload protection, and current-limit safeguards within an 8-lead LFCSP package.

Feature Summary

• Ultralow output noise performance independent of the selected output voltage setting
• High power supply rejection ratio maintained across wide frequency ranges under heavy loads
• Flexible enable pin interface supporting both positive and negative logic control levels
• Integrated thermal overload and current-limit protection mechanisms for system safety

Applications

• Power regulation for analog-to-digital converters requiring clean negative rails
• Precision amplifier biasing in instrumentation systems
• Digital-to-analog converter power supplies in medical devices
• Noise-sensitive circuits in communications infrastructure equipment

Procurement Notes

Verify the specific ordering suffix matches the required tape and reel configuration for automated assembly processes. Confirm that the component meets all applicable environmental compliance standards relevant to your manufacturing region before finalizing procurement orders. Ensure compatibility with existing PCB footprint designs.

Selection Notes

Select this regulator when designing systems requiring stable negative voltage rails for sensitive analog components. Consider the -500 mA maximum output current against peak load demands. Evaluate the need for ultralow noise specifications versus standard LDO alternatives based on signal integrity requirements in the target application circuit.

Part Context

This component belongs to the ADP7185 family of negative low dropout regulators manufactured by Analog Devices Inc. The series provides various fixed output voltage options ranging from -0.5 V to -4.5 V. All variants share the same compact 8-lead LFCSP package and core architectural features designed for high-performance mixed-signal applications.

Replacement Considerations

Direct replacements include other ADP7185 variants with different fixed output voltages such as ADP7185ACPZN-3.3-R7 or ADP7185ACPZN-2.5-R7. Verify that substitute part numbers maintain identical package dimensions and pin configurations to ensure mechanical compatibility without redesigning the printed circuit board layout.