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ADP7118ARDZ-1.8-R7
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Product Detailed Parameters
- Description：IC REG LIN 1.8V 200MA 8-SOIC-EP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：20V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.42V @ 200mA
- Current - Output：200mA
- Current - Quiescent (Iq)：140 µA
- Current - Supply (Max)：320 µA
- PSRR：88dB ~ 50dB (10kHz ~ 1MHz)
- Control Features：Enable, Soft Start
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-SOIC-EP
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Overview
The ADP7118ARDZ-1.8-R7 is a CMOS low dropout linear regulator manufactured by Analog Devices Inc. It operates from an input voltage range of 2.7 V to 20 V and provides up to 200 mA of output current. The device features a fixed 1.8 V output with an initial accuracy of ±0.8%. It delivers ultralow noise of 11 µV rms and high power supply rejection ratios of 88 dB at 10 kHz, 68 dB at 100 kHz, and 50 dB at 1 MHz. Quiescent current is typically 50 µA with no load, dropping to 3 µA in shutdown mode. The regulator is stable with small 2.2 µF ceramic output capacitors and includes precision enable functionality.
Feature Summary
- Ultralow output noise of 11 µV rms independent of the fixed output voltage for options up to 5 V
- High power supply rejection ratio reaching 88 dB at 10 kHz for efficient noise filtering
- Precision enable pin with programmable thresholds and hysteresis for controlled startup
- Stable operation with small 2.2 µF ceramic output capacitors minimizing board space
Applications
- Regulation for noise-sensitive applications such as ADC and DAC circuits
- Powering precision amplifiers and VCO VTUNE control
- Communications and infrastructure systems requiring clean power rails
- Medical and healthcare equipment demanding low noise performance
Procurement Notes
Verify the specific package type and suffix against official documentation before procurement. Confirm availability status through authorized distributors as stock levels fluctuate. Ensure the ordering code matches the required fixed output voltage and thermal package variant. Cross-reference the datasheet revision to confirm feature compatibility and electrical specifications.
Selection Notes
Select this component when designing circuits that require low noise regulation from higher voltage rails down to 1.8 V. Consider the 200 mA current limit and dropout voltage characteristics under maximum load conditions. Evaluate the thermal performance requirements based on the selected package and PCB layout. Verify that the input voltage range and quiescent current meet the system's power budget constraints.
Part Context
The ADP7118 series comprises CMOS LDO regulators designed for high-performance analog and mixed-signal applications. Available in multiple packages including LFCSP, SOIC, and TSOT, the series offers various fixed output voltages and adjustable options. The architecture supports user-programmable soft start and precision enable features for flexible system integration.
Replacement Considerations
Direct substitutes include other ADP7118 variants with different output voltages or packages, such as ADP7118ARDZ-3.3 or ADP7118AUJZ-1.8-R7. Verify pinout compatibility and thermal resistance values when replacing components within the same family.
