ADP7102ARDZ-1.8-R7

Overview

The ADP7102ARDZ-1.8-R7 is a fixed-output CMOS low dropout linear regulator manufactured by Analog Devices Inc., providing a regulated 1.8 V output with a maximum current capability of 300 mA. It operates from an input voltage range of 3.3 V to 20 V and features a typical quiescent current of 750 μA at full load. The device delivers low output noise of 15 μV rms and achieves a power supply rejection ratio of 60 dB at 10 kHz. It incorporates reverse current protection, foldback current limiting, thermal overload protection, and a user-programmable precision undervoltage lockout function.

Feature Summary

• Provides high power supply rejection and low noise performance suitable for sensitive analog circuits using only small ceramic capacitors.
• Includes a digital power-good indicator and a user-programmable precision undervoltage lockout function for system sequencing.
• Features reverse current protection and foldback current limit to safeguard against abnormal operating conditions.

Applications

• Regulation for noise-sensitive applications such as ADCs, DACs, precision amplifiers, and high-frequency oscillators
• Clocks and phase-locked loops in communications and infrastructure systems
• Medical and healthcare equipment requiring stable power rails
• Industrial and instrumentation systems

Procurement Notes

Verify the specific ordering suffix R7 corresponds to the reel packaging configuration required for your assembly line. Confirm that the ARDZ designation matches the SOIC-8 package variant needed for your PCB layout. Ensure compatibility with your manufacturing environment regarding moisture sensitivity levels before procurement.

Selection Notes

Select this component when a fixed 1.8 V rail is required from inputs up to 20 V with minimal external capacitance. Consider the SOIC-8 package for standard surface-mount assembly if space constraints do not necessitate the LFCSP option. Evaluate thermal dissipation requirements based on the expected voltage drop and load current to ensure operation within specified junction temperature limits.

Part Context

This part belongs to the ADP7102 family of high-voltage, low-noise LDO regulators. The series offers multiple fixed output voltage options including 1.5 V, 2.5 V, 3 V, 3.3 V, 5 V, and 9 V, alongside an adjustable version. The family shares common architectural features such as low quiescent current and robust protection mechanisms, differing primarily in output voltage settings and available package types.

Replacement Considerations

Direct functional substitutes within the same family include other fixed voltage variants like ADP7102ARDZ-3.3-R7 or ADP7102ACPZ-1.8-R7, provided the package type (SOIC vs. LFCSP) and output voltage match the design requirements. Verify pinout compatibility and thermal characteristics when substituting between package styles.