ADP7142ARDZ-2.5-R7

Overview

The ADP7142ARDZ-2.5-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc., featuring a fixed 2.5 V output voltage and a maximum output current of 200 mA. It operates within an input voltage range of 2.7 V to 40 V, with a typical quiescent current of 50 μA at no load and 180 μA at full load. The device provides high power supply rejection ratios of 88 dB at 10 kHz and 68 dB at 100 kHz, alongside an ultralow output noise of 11 μV rms across the 10 Hz to 100 kHz bandwidth. Initial output voltage accuracy is ±0.8% at 25°C, expanding to ±1.8% over the full temperature range from −40°C to +125°C. Dropout voltage is typically 200 mV at a 200 mA load. The component is housed in an 8-lead SOIC package.

Feature Summary

• Ultralow output noise performance independent of fixed output voltage for options up to 5 V
• High power supply rejection ratio ensuring effective filtering of input supply variations
• User-programmable soft start capability available in LFCSP and SOIC packages
• Precision enable pin with programmable logic thresholds and hysteresis

Applications

• Regulation for noise-sensitive analog and mixed-signal circuits
• Powering precision amplifiers, ADCs, and DACs
• VCO VTUNE control power supplies
• Communications and infrastructure equipment
• Medical, healthcare, industrial, and instrumentation systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and output voltage configuration. Confirm compliance with automotive AEC-Q100 standards if intended for vehicle applications. Ensure proper thermal management design is implemented given the SOIC package constraints. Validate capacitor selection against minimum capacitance and ESR requirements to maintain stability.

Selection Notes

Select this regulator when a stable 2.5 V rail is required from higher voltage sources up to 40 V. Consider the SOIC package for applications requiring user-programmable soft start features not available in smaller footprints. Evaluate thermal dissipation capabilities based on the expected voltage drop and load current. Verify that the external ceramic capacitors meet the specified dielectric and ESR criteria for optimal transient response.

Part Context

This component belongs to the ADP7142 family of high-voltage, low-noise LDO regulators designed for demanding analog applications. The series offers multiple fixed output voltages and adjustable configurations, supporting various surface-mount packages including LFCSP, SOIC, and TSOT. The architecture emphasizes low quiescent current and excellent line/load regulation, making it suitable for portable and battery-powered devices requiring clean power rails.

Replacement Considerations

Consult official documentation for qualified substitute part numbers before implementation.