1 Features

1• Radiation specifications:

– Single event latch-up >120 MeV-cm2/mg

– Total ionizing dose to 100 krad(Si)

– SMD 5962R1723601VXC

• 40-MHz to 15.2-GHz output frequency

• –110-dBc/Hz phase noise at 100-kHz offset with

15-GHz carrier

• 45 fs RMS jitter at 8 GHz (100 Hz to 100 MHz)

• Programmable output power

• PLL key specifications:

– Figure of merit: –236 dBc/Hz

– Normalized 1/f noise: –129 dBc/Hz

– Up to 200-MHz phase detector frequency

• Synchronization of output phase across multiple

devices

• Support for SYSREF with 9-ps resolution

programmable delay

• 3.3-V single power supply operation

• 71 pre-selected pin modes

• 11 × 11 mm² 64-lead CQFP ceramic package

• Operating temperature range: –55°C to +125°C

• Supported by PLLatinum™ Simulator design tool

2 Applications

• Space communications

• Space radar systems

• Phased array antennas and beam forming

• High-speed data converter clocking (supports

JESD204B)

3 Description

The LMX2615-SP is a high performance wideband

phase-locked loop (PLL) with integrated voltage

controlled oscillator (VCO) and voltage regulators that

can output any frequency from 40 MHz and 15.2 GHz

without a doubler, which eliminates the need for ½

harmonic filters. The VCO on this device covers an

entire octave so the frequency coverage is complete

down to 40 MHz. The high performance PLL with a

figure of merit of –236 dBc/Hz and high phase

detector frequency can attain very low in-band noise

and integrated jitter.

The LMX2615-SP allows users to synchronize the

output of multiple instances of the device. This means

that deterministic phase can be obtained from a

device in any use case including the one with

fractional engine or output divider enabled. It also

adds support for either generating or repeating

SYSREF (compliant to JESD204B standard), making

it an ideal low-noise clock source for high-speed data

converters.

This device is fabricated in Texas Instruments'

advanced BiCMOS process and is available in a 64-

lead CQFP ceramic package.