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ADP7142ARDZ-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),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：40V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：-
- Current - Output：200mA
- Current - Quiescent (Iq)：140 µA
- Current - Supply (Max)：320 µA
- PSRR：-
- Control Features：Enable, Soft Start
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C
- 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 ADP7142ARDZ-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 40 V and provides up to 200 mA of output current. The device features a fixed output voltage of 1.8 V with an initial accuracy of ±0.8%. It delivers ultralow output noise of 11 µV rms across the 10 Hz to 100 kHz bandwidth. Power supply rejection ratio reaches 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 and 180 µA at full load. Dropout voltage is 200 mV typical at 200 mA load.
Feature Summary
- Ultralow output noise of 11 µV rms independent of fixed output voltage
- High power supply rejection ratio of 88 dB at 10 kHz
- Precision enable pin with programmable thresholds and hysteresis
- Stable with small 2.2 µF ceramic output capacitors
Applications
- Regulation for noise-sensitive applications
- ADC and DAC circuits
- Precision amplifiers
- Power for VCO VTUNE control
- Communications and infrastructure systems
Procurement Notes
Verify the package type matches the required footprint, as the ADP7142 series includes LFCSP, SOIC, and TSOT options. Confirm the suffix indicates the correct fixed output voltage of 1.8 V. Ensure the ordering code specifies the R7 reel packaging format if automated assembly is planned. Cross-reference the specific part number against the manufacturer's latest datasheet revision to confirm active status and any potential design changes.
Selection Notes
Select this component when high input voltages up to 40 V must be regulated down to 1.8 V with minimal noise impact on sensitive analog loads. The device is suitable for portable equipment due to its low quiescent current consumption. Consider the thermal resistance of the chosen package if operating near maximum load currents. Verify that the application environment temperature falls within the specified -40°C to +125°C range for guaranteed accuracy specifications.
Part Context
This part belongs to the ADP7142 family of low noise, high input voltage LDO regulators. The family offers multiple fixed output voltage options ranging from 1.2 V to 5.0 V. It is designed for high-performance analog and mixed-signal circuits requiring clean power rails. The architecture supports adjustable output voltages above the fixed set point using external feedback dividers while maintaining low noise characteristics.
Replacement Considerations
Direct replacements include other ADP7142 variants with different fixed output voltages such as ADP7142ARDZ-2.5-R7 or ADP7142ARDZ-3.3-R7, provided the circuit allows voltage adjustment via external resistors. Other packages in the same family like ADP7142AUJZ-1.8-R7 offer identical electrical performance in a TSOT-23-5 footprint.
