Ultra-low-noise RF low-dropout regulators reduce phase noise in communication systems

Analog Devices has released ultra-low-noise LDO (low-dropout) regulators for RF (radio frequency) signal devices. The ADM7150/1 operate from 4.5 V to 16 V, provide up to 800-mA of output current and support output voltages from 1.5 to 5.0 V.

The LDOs achieve an output-NSD (noise spectral density) of 1.4 nV/rtHz from 10 kHz to 1 MHz, which significantly reduces VCO (voltage-controlled oscillator) phase noise in point-to-point microwave radios, satellite communications, defence electronics and other wideband applications. A user adjustable CBYP can significantly reduce low frequency 1/f noise (8 nV/rtHz at 100 Hz) for precision analogue front-end measurement systems.

In addition to ultra-low noise, the ADM7150/1 achieve line and load transient responses of 0.01%/V and 0.4%/A respectively with a 10-µF ceramic output capacitor. The new LDOs also feature high PSRR (power-supply rejection ratio) performance of greater than 90 dB from 1 kHz to 100 kHz, and greater than 60 dB at 1 MHz. This effectively filters DC-DC switching regulator ripple, saving space by minimising the size of discrete filtering components normally needed.

www.analog.com

 

Check Also

Wurth Electronics will be exhibiting at Engineering Design Show 2021!

Wurth Electronics will be exhibiting at Engineering Design Show 2021! Come and find Wurth Electronics …