Ultra low noise RF low dropout regulators reduce phase noise

NORWOOD, USA: ADI, a global leader in high performance semiconductors for signal processing applications, announced the release of ultra low noise LDO regulators for RF 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 of 1.4 nV/rtHz from 10 kHz to 1 MHz, which significantly reduces VCO phase noise in point-to-point microwave radios, satellite communications, defense electronics and other wideband applications.

Additionally, a user adjustable CBYP can significantly reduce low frequency 1/f noise for precision analog 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 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 minimizing the size of discrete filtering components normally needed.