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ADM7151ARDZ-04-R7
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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 800MA 8-SOIC
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：1.5V
- Voltage - Output (Max)：5.1V
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：7 mA
- Current - Supply (Max)：12 mA
- PSRR：94dB ~ 53dB (1kHz ~ 1MHz)
- Control Features：Enable
- Protection Features：Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Supplier Device Package：8-SOIC-EP
- Grade：-
- Qualification：-
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Overview
The ADM7151ARDZ-04-R7 is an adjustable ultralow noise, high PSRR RF linear regulator from Analog Devices. It supports an input voltage range of 4.5 V to 16 V and delivers up to 800 mA output current. The output voltage is adjustable between 1.5 V and 5.1 V with ±2% accuracy over line, load, and temperature conditions. Key electrical parameters include a quiescent current of 4.3 mA at no load, a shutdown current of 0.1 µA, and a dropout voltage of 0.6 V at 5 V output under 800 mA load. It features 1.0 µV rms integrated noise (100 Hz to 100 kHz) and >90 dB PSRR from 1 kHz to 100 kHz.
Feature Summary
- Ultralow noise performance with 1.7 nV/√Hz spectral density from 10 kHz to 1 MHz.
- High power supply rejection ratio exceeding 90 dB across a wide frequency range.
- Optimized for stability with low-ESR ceramic output capacitors.
- Integrated thermal overload and current-limit protection.
Applications
- RF mixers, phase-locked loops (PLLs), and voltage-controlled oscillators (VCOs)
- Clock distribution circuits
- Ultrasound and other imaging applications
- High-speed RF transceivers
- Communications and infrastructure systems
Procurement Notes
Verify the specific suffix -04 indicates the model optimized for higher output voltages (up to 5.1 V). Confirm package type matches design requirements, as the device is available in 8-lead LFCSP and SOIC packages. Ensure minimum capacitance specifications are met using X7R or X5R types to maintain stability. Check datasheet revision B for updated ordering information and application circuit details.
Selection Notes
Select this component when ultralow noise and high PSRR are critical for sensitive RF or analog circuits. The -04 variant is suitable for applications requiring output voltages up to 5.1 V. Consider thermal dissipation capabilities based on the PCB layout and ambient temperature. Verify that the required output voltage falls within the 1.5 V to 5.1 V adjustable range defined by the external resistor divider.
Part Context
The ADM7151 series targets radio frequency applications requiring clean power supplies. It utilizes a P-channel MOSFET pass transistor controlled by an error amplifier. An internal active ripple filter isolates the low-noise LDO from input voltage noise. The device offers two models to optimize power dissipation and PSRR performance based on specific input and output voltage combinations.
Replacement Considerations
Public confirmed substitute part numbers: None identified in source material.
FAQ
How is the output voltage adjusted?
The output voltage is set using an external resistor divider connected to the REF and REF_SENSE pins, calculated as VOUT = 1.5 V × (1 + R1/R2).
What capacitor types are recommended for stability?
X7R and X5R type ceramic capacitors are recommended. Y5V and Z5U capacitors are not recommended due to potential instability issues.
