ADP7156ARDZ-3.3-R7

Overview

The ADP7156ARDZ-3.3-R7 is a fixed-output linear regulator from Analog Devices, providing a stable 3.3 V output with a maximum load current of 1.2 A. It operates within an input voltage range of 2.3 V to 5.5 V and features ultralow noise characteristics, including 0.9 µV rms integrated noise (100 Hz to 100 kHz) and 80 dB power supply rejection ratio at 1 kHz to 100 kHz. The device achieves a typical dropout voltage of 120 mV at full load and maintains a quiescent current of 7 mA under maximum load conditions.

Feature Summary

• Ultralow noise architecture optimized for RF applications
• High power supply rejection ratio across wide frequency ranges
• Precision enable pin with defined logic thresholds
• Compatible with small ceramic output capacitors

Applications

• Phase-locked loops (PLLs)
• Voltage controlled oscillators (VCOs)
• Backhaul and microwave links

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the ARDZ designation corresponds to the industrial temperature range and SOIC package variant. Ensure compatibility with standard surface-mount assembly processes. Check for automotive qualification status if required by system specifications.

Selection Notes

Select this component for designs requiring high line regulation and minimal output ripple in compact form factors. The fixed 3.3 V output eliminates external resistor networks. Consider thermal dissipation requirements given the 1.2 A capability and SOIC package constraints. Verify input voltage headroom against the specified dropout characteristics.

Part Context

This part belongs to the ADP7156 family of ultralow noise linear regulators designed for radio frequency systems. It shares architectural similarities with the ADP7157 but offers a fixed output voltage option. The series targets infrastructure and communications equipment where signal integrity is critical.

Replacement Considerations

ADP7157ARPZ-3.3-R7