ADP7142ARDZ-R7

Overview

The ADP7142ARDZ-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices. 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 typical quiescent current of 50 μA at no load and a shutdown current of 3.0 μA at 40 V. It offers high power supply rejection ratios of 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz. Output noise is specified at 11 μV rms across the 10 Hz to 100 kHz bandwidth. Initial accuracy is ±0.8%, with total accuracy over line, load, and temperature ranging from −1.2% to +1.8%. The component utilizes an 8-lead SOIC package.

Feature Summary

• Provides ultralow output noise independent of fixed output voltage options
• Features user-programmable soft start capability via external capacitor in SOIC packages
• Includes precision enable pin with programmable logic thresholds and hysteresis
• Stable with small ceramic output capacitors without requiring specific ESR values

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering ADC, DAC circuits, and precision amplifiers
• Providing control voltage for VCO VTUNE applications
• Communications and infrastructure systems
• Medical, healthcare, industrial, and instrumentation equipment

Procurement Notes

Verify that the ordering suffix matches the required package type and output voltage configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the specific revision level aligns with design requirements. Check for any automotive qualification markings if intended for AEC-Q100 environments. Validate datasheet specifications against actual application conditions before finalizing procurement.

Selection Notes

Select this regulator when high input voltages up to 40 V are present alongside low noise requirements. Consider the adjustable output architecture if a fixed voltage needs to be increased via external dividers. Evaluate thermal performance based on PCB layout and ambient temperature constraints. Verify that the minimum capacitance requirement of 1.5 μF can be met using X5R or X7R dielectrics. Assess the need for programmable soft start to manage inrush currents during startup.

Part Context

This component belongs to the ADP7142 family of low dropout regulators designed for high-performance analog applications. The series supports various output voltages and packages including LFCSP, SOIC, and TSOT. It is engineered to replace older LDO solutions requiring larger electrolytic capacitors. The architecture allows flexibility in adjusting output voltages above initial set points while maintaining low noise characteristics.

Replacement Considerations

Consult the official Analog Devices ordering guide for direct cross-references within the ADP7142 series. Verify pin compatibility and thermal resistance differences between alternative packages like LFCSP or TSOT. Ensure replacement parts maintain the same input voltage range and output current capabilities.