Texas Instruments LMX2592 Handleiding

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LMX2592 High Performance, Wideband PLLatinum™ RF Synthesizer With Integrated

VCO

1 Features

•Output Frequency Range from 20 to 9800 MHz

•Industry Leading Phase Noise Performance

–VCO Phase Noise: –134.5 dBc/Hz at 1-MHz

Offset for 6-GHz Output

–Normalized PLL Noise Floor: –231 dBc/Hz

–Normalized PLL Flicker Noise: –126 dBc/Hz

–49-fs RMS Jitter (12 kHz to 20 MHz) for 6 GHz

Output

•Input Clock Frequency Up to 1400 MHz

•Phase Detector Frequency Up to 200 MHz,

and Up to 400 MHz in Integer-N Mode

•Supports Fractional-N and Integer-N Modes

•Dual Differential Outputs

•Innovative Solution to Reduce Spurs

•Programmable Phase Adjustment

•Programmable Charge Pump Current

•Programmable Output Power Level

•SPI or uWire (4-Wire Serial Interface)

•Single Power Supply Operation: 3.3 V

2 Applications

•Test and Measurement Equipment

•Defense and RADAR

•Microwave Backhaul

•High-Performance Clock Source for High-Speed

Data Converters

•Satellite Communications

3 Description

The LMX2592 device is a low-noise, wideband RF

PLL with integrated VCO that supports a frequency

range from 20 MHz to 9.8 GHz. The device supports

both fractional-N and integer-N modes, with a 32-bit

fractional divider allowing fine frequency selection.

Integrated noise of 49 fs for 6-GHz output makes it an

ideal low-noise source. Combining best-in-class PLL

and integrated VCO noise with integrated LDOs, this

device removes the need for multiple discrete devices

in high performance systems.

The device accepts input frequencies up to 1.4

GHz, which combined with frequency dividers and

programmable low noise multiplier allows flexible

frequency planning. The additional programmable

low-noise multiplier lets users mitigate the impact

of integer boundary spurs. In Fractional-N mode,

the device can adjust the output phase by a 32-bit

resolution. For applications that need fast frequency

changes, the device supports a fast calibration option

which takes less than 25 µs.

This performance is achieved by using single 3.3-V

supply. It supports 2 flexible differential outputs that

can be configured as single-ended outputs as well.

Users can choose to program one output from the

VCO (or doubler) and the second from the channel

divider. When not being used, each output can be

muted separately.

Package Information

(1)

PART NUMBERDESCRIPTIONBODY SIZE (NOM)

LMX2592RHAT

LMX2592RHAR

VQFN (40)6.00 mm × 6.00 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

VCO

doubler

Charge

Pump

Vtune

(pin 35)

Cpout

(pin 12)

RFoutAP

Sigma-Delta

Modulator

N Divider

OSCin

Douber

Post-R

Divider

Multiplier

Pre-R

Divider

ϕ

Vcc

RFoutAM

RFoutBP

Vcc

Prescaler

Channel

Divider

External Loop Filter

Phase

Detector

Output

Buffer

OSCin

Buffer

Serial Interface

Control

SDI (pin 17)

SCK (pin 16)

CSB (pin 24)

SDO / LD (pin 20)

OSCinP

(pin 8)

OSCinM

(pin 9)

Input

Signal

RFoutBM

MUX

MUX

MUX

Simplified Schematic

LMX2592

SNAS646G – DECEMBER 2015 – REVISED AUGUST 2022

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.

Product specificaties