Analog Devices' Ultra-Low-Noise LDOs Optimize Load Performance In Communications, Medical And Industrial Systems



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Analog Devices, Inc., (ADI), a global leader in high-performance semiconductors for signal-processing applications, today introduced a pair of LDOs (low dropout regulators) with low noise, high power supply rejection, and excellent line and load transient response. The ADP7102 and ADP7104 LDOs achieve a 15 ?Vrms fixed-voltage noise figure, power supply rejection ratio (PSRR) of 60 dB at 10 kHz in 3-V operation, and feature reverse current protection to guard against shorts and sudden load discharges. The new LDOs are designed to maximize the load performance and yield higher data conversion accuracy and resolution in high-frequency communications infrastructure, medical imaging, and industrial and instrumentation applications.

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  • Learn more about ADI's power management applications, design tools and case studies: "ADI's newest LDOs are specially designed for noise-sensitive, high-performance loads typical of A/D and D/A converters, DSPs, FPGAs, precision amplifiers, high-frequency clocks, oscillators and PLL circuits," said Laurence McGarry, marketing manager, Power Management Products Group, Analog Devices. "This improved load performance can enable higher converter frequency and accuracy, which in a medical ultrasound system, for example, can mean high image resolution." The new LDOs operate from 3.3 V to 20 V and are designed to regulate high-performance analog and mixed-signal circuits operating from 19 V to 1.22 V rails while achieving excellent line and load transient response with just a small 1-?F ceramic output. The ADP7102 has a maximum output current of 500 mA, while the maximum output current of the ADP7104 is 300 mA. Both LDOs are available in an 8-lead SOIC-EP and a space saving 3-mm x 3-mm LFCSP package that provides excellent thermal performance for applications requiring up to 300 mA of output current in a small, low-profile footprint. ADP7102 and ADP7104 LDO Key Features
    • Input voltage range: 3.3 V to 20 V
    • Maximum output current:
    • ADP7102 = 300 mA
    • ADP7104 = 500 mA
    • Low Noise: 15 ?VRMS for fixed output versions
    • PSRR = 60 dB @ 10 kHz at VOUT = 3.3 V
    • Reverse current protectionLow dropout voltage:
    • ADP7102 = 200 mV at 300 mA load
    • ADP7104 = 280 mV @ 500 mA load
    • Stable with small 1-?F ceramic output capacitor
    • 7 fixed output voltage options: 1.5, 1.8, 2.5, 3, 3.3, 5, 9 V
    To subscribe to ADI's News Feed Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the most long-standing, high-growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronics equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices, Inc. is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. It has manufacturing facilities in Massachusetts, California, North Carolina, Ireland, and the Philippines. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.