ADP7142ARDZ-5.0-R7

Overview

The ADP7142ARDZ-5.0-R7 is a fixed-output low dropout linear regulator manufactured by Analog Devices Inc., providing a precise 5.0 V output with a maximum load current of 200 mA. It operates from an input voltage range of 2.7 V to 40 V and features ultralow output noise of 11 µV rms across the 10 Hz to 100 kHz bandwidth. The device achieves high power supply rejection ratios, reaching 88 dB at 10 kHz, while maintaining a typical quiescent current of 50 µA under no-load conditions. Initial output voltage accuracy is specified at ±0.8%, ensuring stable regulation for sensitive analog circuits.

Feature Summary

• Ultralow output noise performance independent of the fixed output voltage setting
• High power supply rejection ratio (PSRR) across multiple frequency bands
• Precision enable pin with programmable logic thresholds and hysteresis
• User-programmable soft start capability via external capacitor in SOIC packages

Applications

• Regulation for noise-sensitive applications such as ADC and DAC circuits
• Powering precision amplifiers and VCO VTUNE control systems
• Communications and infrastructure equipment requiring clean power rails
• Medical and healthcare instrumentation devices
• Industrial and instrumentation systems

Procurement Notes

Verify that the component matches the exact part number ADP7142ARDZ-5.0-R7 before procurement. Confirm the package type corresponds to the 8-Lead SOIC variant. Ensure the supplier provides valid documentation confirming the fixed 5.0 V output specification. Check for any specific handling requirements related to electrostatic discharge sensitivity during storage and installation.

Selection Notes

Select this regulator when a stable 5.0 V rail is required from higher input voltages up to 40 V. It is suitable for designs needing minimal output noise without complex filtering. Consider the SOIC package if user-programmable soft start functionality is desired. Evaluate thermal dissipation based on the expected load current and ambient temperature conditions to ensure junction temperatures remain within safe operating limits.

Part Context

This component belongs to the ADP7142 family of CMOS LDO regulators designed for high-performance mixed-signal circuits. The series supports various fixed output voltages ranging from 1.2 V to 5.0 V. It is available in multiple package options including LFCSP, SOIC, and TSOT to accommodate different footprint and thermal requirements. The architecture allows fixed outputs to be adjusted higher using external resistors.

Replacement Considerations

Direct replacements include other ADP7142 variants with different fixed output voltages or adjustable versions. Verify compatibility regarding package dimensions, pinout configurations, and thermal resistance values. Ensure the substitute maintains similar PSRR and noise specifications for sensitive analog applications.