ADP7183ACPZN3.3-R7

Overview

The ADP7183ACPZN3.3-R7 is a negative-output low dropout linear regulator from Analog Devices, providing a fixed -3.3 V output with up to -300 mA load current capability. It operates within an input voltage range of -2.0 V to -5.5 V and features ultralow noise performance, delivering 4 μV rms integrated noise from 100 Hz to 100 kHz. The device achieves high power supply rejection ratios of 75 dB at 10 kHz and 62 dB at 100 kHz under full load conditions. Initial output voltage accuracy is specified at ±0.5% at 25°C, expanding to ±2.6% across line, load, and temperature variations. Dropout voltage is typically -130 mV at maximum load.

Feature Summary

• Ultralow noise architecture delivers 4 μV rms output noise independent of the selected output voltage setting.
• High power supply rejection ratio maintains effective noise attenuation across wide frequency ranges under heavy loading.
• Positive or negative enable logic provides flexible interfacing options for system control signals.
• Stable operation is ensured using small ceramic capacitors, requiring only 4.7 μF on both input and output terminals.

Applications

• Power regulation for analog-to-digital converters (ADCs)
• Supply conditioning for digital-to-analog converters (DACs)
• Noise-sensitive precision amplifier circuits
• Medical and healthcare instrumentation systems

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when reviewing distributor listings. Confirm that the ACPZN designation corresponds to the 8-lead LFCSP package variant. Ensure compatibility with negative voltage rails during system design validation. Cross-reference the manufacturer part number against official Analog Devices ordering guides to confirm availability status.

Selection Notes

Select this component for applications requiring stable negative voltage rails with minimal noise interference. The fixed -3.3 V option eliminates external feedback resistor networks, simplifying board layout. Verify that the input voltage remains within the operational window while accounting for dropout requirements. Consider thermal dissipation limits based on the expected load current and ambient operating conditions.

Part Context

This device belongs to the ADP7183 family of complementary metal oxide semiconductor low dropout regulators designed for high-performance mixed-signal circuits. The series offers multiple fixed voltage options ranging from -0.5 V to -4.5 V alongside adjustable variants. All members share the same compact 2 mm × 2 mm footprint and advanced proprietary architecture for consistent noise and transient response characteristics.

Replacement Considerations

Direct functional substitutes include other ADP7183 variants with different fixed output voltages such as ADP7183ACPZN2.5-R7 or ADP7183ACPZN-R7 for adjustable configurations. Ensure pinout compatibility and verify that alternative packages match the required thermal and electrical specifications.