ADP7142ARDZ-5.0

Overview

The ADP7142ARDZ-5.0 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 5.0 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, dropping to 3 µA in shutdown mode. It includes user-programmable soft start and precision enable functions.

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) providing excellent filtering across frequencies from 10 kHz to 1 MHz.
• User-programmable soft start capability via an external capacitor on the SS pin for LFCSP and SOIC packages.
• Precision enable function with programmable logic thresholds and hysteresis to prevent oscillation.

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering ADC and DAC circuits
• Supplying precision amplifiers
• Providing power for VCO VTUNE control

Procurement Notes

Verify the specific package type and suffix against the manufacturer's official ordering guide to ensure compatibility with your PCB footprint and thermal requirements. Confirm that the component meets AEC-Q100 automotive qualification standards if intended for automotive applications. Cross-reference the datasheet revision to ensure all electrical specifications align with your design constraints.

Selection Notes

Select this regulator when high input voltages up to 40 V must be stepped down to a stable 5 V rail with minimal noise. Ensure the application utilizes X5R or X7R ceramic capacitors with sufficient capacitance to maintain stability. Consider the SOIC package for applications requiring user-programmable soft start and precision enable features not available in smaller footprints.

Part Context

The ADP7142 series comprises CMOS LDO regulators designed for high-performance analog and mixed-signal applications. Available in multiple fixed output voltages and adjustable configurations, the family supports various surface-mount packages including 6-lead LFCSP, 8-lead SOIC, and 5-lead TSOT. The architecture emphasizes low noise and high PSRR while maintaining stability with small ceramic output capacitors.

Replacement Considerations

Consult the official Analog Devices ADP7142 ordering guide for verified substitute part numbers within the same product family. Ensure any replacement maintains the required 40 V input rating, 200 mA output current, and compatible package dimensions.