LMX2491 Datasheet (Texas Instruments) - 6.4-GHz Low Noise RF PLL

LMX2491, 6.4-GHz Low Noise RF PLL

The LMX2491 device is a low-noise, 6.4-GHz wideband delta-sigma fractional N PLL with ramp and chirp generation.

It consists of a phase frequency detector, programmable charge pump, and high frequency input for the external VCO.

The LMX2491 supports a broad and flexible class of ramping capabilities

LMX2491 Features

* 1

* 227-dBc/Hz Normalized PLL Noise

* 500-MHz to 6.4-GHz Wideband PLL

* 3.15-V to 5.25-V Charge Pump PLL Supply

* Versatile Ramp / Chirp Generation

* 200-MHz Maximum Phase Detector Frequency

* FSK / PSK Modulation Pin

* Digital Lock Det