LMX2595 Datasheet, PDF (1/70 Pages) Texas Instruments – 19-GHz Wideband PLLatinum RF Synthesizer With Phase Synchronization and JESD204B Support

Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
LMX2595 19-GHz Wideband PLLatinum™ RF Synthesizer
With Phase Synchronization and JESD204B Support
LMX2595
SNAS736 – JUNE 2017
1 Features
•1 10-MHz to 19-GHz Output Frequency
• –110 dBc/Hz Phase Noise at 100-kHz Offset With
15-GHz Carrier
• 45-fs rms Jitter at 7.5 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
– High Phase Detector Frequency
– 400-MHz Integer Mode
– 300-MHz Fractional Mode
– 32-bit Fractional-N Divider
• Remove Integer Boundary Spurs With
Programmable Input Multiplier
• Synchronization of Output Phase Across Multiple
Devices
• Support for SYSREF With 9-ps Resolution
Programmable Delay
• Frequency Ramp and Chirp Generation Ability for
FMCW Applications
• < 20-µs VCO Calibration Speed
• 3.3-V Single Power Supply Operation
2 Applications
• 5G and mm-Wave Wireless Infrastructure
• Test and Measurement Equipment
• Radar
• MIMO
• Phased Array Antennas and Beam Forming
• High-Speed Data Converter Clocking (Supports
JESD204B)
3 Description
The LMX2595 high-performance, wideband
synthesizer that can generate any frequency from 10
MHz to 19 GHz. An integrated doubler is used for
frequencies above 15 GHz. The high performance
PLL with figure of merit of –236 dBc/Hz and high-
phase detector frequency can attain very low in-band
noise and integrated jitter. The high speed N-divider
has no pre-divider, thus significantly reducing the
amplitude and number of spurs. There is also a
programmable input multiplier to mitigate integer
boundary spurs.
The LMX2595 allows users to synchronize the output
of multiple devices and also enables applications that
need deterministic delay between input and output. A
frequency ramp generator can synthesize up to 2
segments of ramp in an automatic ramp generation
option or a manual option for maximum flexibility. The
fast calibration algorithm allows changing frequencies
faster than 20 µs. The LMX2595 adds support for
generating or repeating SYSREF (compliant to
JESD204B standard) making it an ideal low-noise
clock source for high-speed data converters. Fine
delay adjustment (9-ps resolution) is provided in this
configuration to account for delay differences of
board traces.
The output drivers within LMX2595 deliver output
power as high as 7 dBm at 15-GHz carrier frequency.
The device runs from a single 3.3-V supply and has
integrated LDOs that eliminate the need for on-board
low noise LDOs.
Simplified Schematic
Input
signal
OSCinP
OSCinM
CSB
SCK
SDI
MUXout
OSCin
Douber
Pre-R
Divider
Multiplier
Post-R
Divider
Phase
Detector
I
Charge
Pump
Serial Interface
Control
Sigma-Delta
Modulator
N Divider
2X
MUX
Channel
Divider
MUX
SYSREF
Loop Filter
CPout
Vtune
RFoutAP
Vcc
RFoutAM
RFoutBM
Vcc
RFoutBP
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.