ADP7142ARDZ-2.5

Overview

The ADP7142ARDZ-2.5-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 40 V and provides up to 200 mA of output current. The device features a fixed output voltage of 2.5 V 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, dropping to 180 µA at full load. The package type is SOIC-8.

Feature Summary

• Ultralow output noise of 11 µV rms independent of the fixed output voltage for options of 5 V or less.
• High power supply rejection ratio (PSRR) of 88 dB at 10 kHz, ensuring effective filtering of input supply ripple.
• Capable of operating with small 2.2 µF ceramic output capacitors while maintaining stability and excellent transient response.
• Features user-programmable soft start via an external capacitor in the SOIC package to limit inrush current.

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering ADC and DAC circuits
• Precision amplifier applications
• Medical and healthcare equipment
• Automotive electronics

Procurement Notes

Verify the exact part number suffix against official documentation, as ordering codes determine specific package types, temperature ranges, and reel quantities. Confirm RoHS compliance status and automotive qualification requirements if applicable to your design. Ensure that the selected component matches the required output voltage tolerance and thermal performance specifications for your intended application environment.

Selection Notes

Select this component when designing systems requiring high input voltages up to 40 V with strict low-noise requirements. Consider the SOIC-8 package for applications needing user-programmable soft start capabilities. Evaluate the thermal resistance characteristics relative to your PCB layout to ensure junction temperatures remain within specified limits during operation under maximum load conditions.

Part Context

The ADP7142 series represents a family of high-voltage, low-noise LDO regulators designed for precision applications. This specific variant offers a fixed 2.5 V output, distinguishing it from adjustable models or other fixed voltage options within the same product line. It utilizes an advanced proprietary architecture to achieve superior line and load transient responses compared to standard LDOs.

Replacement Considerations

Refer to official manufacturer documentation for confirmed substitute part numbers. Cross-referencing should be performed carefully to ensure compatibility regarding pinout, electrical parameters, and package dimensions before implementation in existing designs.