Dual PLL frequency synthesizer — RF and IF in one CSP
The LMX2331USLBX is a dual PLL frequency synthesizer from the PLLatinum series, combining a main synthesizer rated to 2 GHz and an auxiliary synthesizer rated to 600 MHz in a single 24-pin CSP package. The 3:1 input-to-output ratio lets you select among three reference inputs for the PLL path, and the bypass mode disables the internal phase detector for direct VCO control.
Supply, interface, and temperature range
CMOS and TTL input levels are accepted; the output drives CMOS loads. The differential input accepts a differential reference while the output stays single-ended CMOS — useful when the reference source is a differential TCXO or OCXO.