ADP7185ACPZN2.0-R7

Overview

The ADP7185ACPZN2.0-R7 is a negative-output low dropout linear regulator from Analog Devices, designed for high-performance analog and mixed-signal circuits. It operates within an input voltage range of −2.0 V to −5.5 V and delivers up to −500 mA of output current. This specific variant provides a fixed output voltage of −2.0 V with ±0.5% initial accuracy. The device features ultralow noise performance, delivering 4 μV rms integrated noise from 100 Hz to 100 kHz, alongside high power supply rejection ratios reaching 68 dB at 10 kHz under full load. It utilizes an 8-lead, 2 mm × 2 mm LFCSP package.

Feature Summary

• Provides ultralow noise regulation suitable for sensitive analog signal paths
• Delivers high power supply rejection ratio across wide frequency ranges
• Supports positive or negative logic enable control for flexible system integration
• Incorporates internal current-limit and thermal overload protection mechanisms

Applications

• Powering analog-to-digital converters (ADCs)
• Powering digital-to-analog converters (DACs)
• Precision amplifier biasing
• Communications infrastructure equipment

Procurement Notes

Verify the exact suffix R7 corresponds to reel packaging requirements before ordering. Confirm that the fixed −2.0 V output option matches the specific circuit design needs, as other voltages are available in the series. Ensure compatibility with the required 4.7 μF ceramic capacitor specifications for stable operation. Check lead times due to potential limited availability status associated with this component family.

Selection Notes

Select this component when a stable negative rail is required for precision instrumentation. The −500 mA capability supports moderate load currents while maintaining tight line and load regulation. Consider the small footprint if board space is constrained. Verify that the input voltage remains sufficiently above the output voltage to prevent excessive dropout, particularly at maximum load currents.

Part Context

This regulator belongs to the ADP7185 family of complementary metal oxide semiconductor (CMOS) low dropout linear regulators. The family is characterized by advanced proprietary architecture optimized for ultralow noise and high PSRR. Other variants in the series offer different fixed output voltages ranging from −0.5 V to −4.5 V, as well as adjustable versions, all sharing similar electrical characteristics and package dimensions.

Replacement Considerations

Direct substitutes include other ADP7183 or ADP7182 variants if lower current ratings are acceptable. Verify pinout compatibility and thermal resistance values when swapping between different package types within the manufacturer's portfolio.