ADM7160ACPZN1.8-R7

Overview

The ADM7160ACPZN1.8-R7 is a fixed-output ultralow noise linear regulator manufactured by Analog Devices Inc., providing a stable 1.8 V output with a maximum load current of 200 mA. It operates within an input voltage range of 2.2 V to 5.5 V and features a typical dropout voltage of 150 mV at full load. The device incorporates a low quiescent current of 265 μA and achieves high power supply rejection ratio (PSRR) performance of 54 dB at 100 kHz. Designed for stability with small ceramic capacitors, it utilizes a compact 6-lead LFCSP package.

Feature Summary

• Ultralow noise architecture that eliminates the need for external bypass capacitors while maintaining superior PSRR and transient response.
• Low dropout voltage capability ensures efficient operation across a wide input voltage range up to 5.5 V.
• Integrated enable pin with internal pull-down resistor and built-in hysteresis prevents oscillation during state transitions.
• Robust protection mechanisms include thermal overload shutdown and current limiting to safeguard against adverse operating conditions.

Applications

• Power supplies for analog-to-digital and digital-to-analog converters
• Powering RF, VCO, and PLL circuits
• Post dc-to-dc regulation stages

Procurement Notes

Verify the specific ordering suffix matches the required package type and output voltage configuration before procurement. Confirm that the component meets all applicable environmental compliance standards relevant to your region. Ensure that the supplier provides valid traceability documentation and original manufacturer packaging to guarantee authenticity and prevent counterfeit risks.

Selection Notes

Select this regulator when designing noise-sensitive analog front-ends or RF systems requiring clean power without adding bulky filter components. Consider the 6-lead LFCSP package for applications demanding excellent thermal dissipation in space-constrained layouts. Evaluate the input-to-output voltage differential to ensure the junction temperature remains within safe operational limits under maximum load conditions.

Part Context

This component belongs to the ADM7160 family of ultralow noise linear regulators designed for high-performance signal processing applications. The series offers multiple fixed output voltage options ranging from 1.1 V to 3.3 V. Available in both 5-lead TSOT and 6-lead LFCSP packages, the family balances ultra-low noise performance with compact footprint requirements for modern electronic designs.

Replacement Considerations

Direct substitutes within the same family include other ADM7160 variants with different fixed output voltages, such as the ADM7160ACPZN2.5-R7 or ADM7160ACPZN3.3-R7. These parts share identical pinouts, electrical characteristics, and package dimensions, allowing for straightforward interchangeability if the system design permits adjusting the target supply voltage.

FAQ

Does the ADM7160 require an external capacitor to achieve its specified noise performance?

No, the ADM7160 is specifically designed to achieve ultralow noise performance without the need for an external bypass capacitor.

How does the EN pin behave if left unconnected?

The EN pin includes an internal pull-down resistor that holds the input logic low, ensuring the regulator remains disabled when the pin is left open.