Using a proprietary digital-phase, locked-loop technique, the LMX243x devices generate
very stable, low-noise control signals for RF and IF voltage controlled oscillators. Both the RF
and IF synthesizers include a two-level programmable charge pump. Both the RF and IF PLLs have
dedicated fastlock circuitry with integrated time-out counters which require only a single word
write to power up or change frequencies.
The LMX243x devices are high-performance frequency synthesizers with integrated
dual-modulus prescalers. A 32/33 or a 16/17 prescale ratio can be selected for the 5-GHz LMX2434 RF
synthesizer. An 8/9 or a 16/17 prescale ratio can be selected for both the LMX2430 and LMX2433 RF
synthesizers. The IF circuitry contains an 8/9 or a 16/17 prescaler.
Serial data is transferred to the devices through a three-wire interface (DATA, LE, CLK).
A low voltage logic interface allows direct connection to 1.8-V devices. Supply voltages from 2.25
V to 2.75 V are supported.
View datasheet View product folder