RF LDO regulators for wideband communication systems
Analog Devices introduce new low-dropout regulators featuring ultra-low-noise for radio frequency signal devices. Operating from 4.5 V to 16 V, the new ADM7150/1 offer up to 800-mA of output current and support output voltages from 1.5 to 5.0 V. Reducing VCO phase noise in point-to-point microwave radios, satellite communications, defence electronics and other wideband applications, the ADM7150/1 achieve an output-NSD of 1.4 nV/rtHz from 10 kHz to 1 MHz.
A user adjustable CBYP can significantly reduce low frequency 1/f noise (8 nV/rtHz at 100 Hz) for precision analog front-end measurement systems.
With line and load transient responses of 0.01%/V and 0.4%/A with a 10-µF ceramic output capacitor, the ADM7150/1 also feature high power-supply rejection ratio performance of greater than 90 dB from 1 kHz to 100 kHz, and greater than 60 dB at 1 MHz.
Minimising the size of discrete filtering components normally needed, this effectively filters DC-DC switching regulator ripple, saving space.
The ADM7150 (with a fixed Vout) is available now in 3-mm x 3-mm, 8-lead LFCSP and SOIC packages, priced at $3.64 (USD) each in 1,000 unit quantities. The ADM7151 is offered in the same package at the same price but features an adjustable Vout.
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