Datasheet > LMX2820

LMX2820

更新时间： 2024-11-26 02:52:07

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
40页	1534K
描述
LMX2820 22.4-GHz Wideband PLLatinumâ¢ RF Synthesizer With Phase Synchronization and JESD204B Support

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LMX2820

SNAS783 –JUNE 2020

LMX2820 22.4-GHz Wideband PLLatinum™ RF Synthesizer

With Phase Synchronization and JESD204B Support

1 Features

3 Description

The LMX2820 is a high-performance, wideband

synthesizer that can generate any frequency in the

range of 43.75 MHz to 22.4 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.

•

Output frequency: 43.75 MHz to 22.4 GHz

< 40-fs rms jitter (12 kHz – 95 MHz)

High-performance PLL

–

Figure of merit: –236 dBc/Hz

Normalized 1/f noise: –134 dBc/Hz

High phase detector frequency

–

400-MHz integer mode

300-MHz fractional mode

The LMX2820 allows users to synchronize the output

of multiple devices and also enables applications that

need deterministic delay between input and output.

The fast calibration algorithm greatly reduces the

VCO calibration time to under 5 µs, enabling systems

requiring fast frequency hopping. The LMX2820 can

generate or repeat SYSREF that is compliant to the

JESD204B standard, allowing for its use as a low-

noise clock source for high-speed data converters.

This synthesizer can also be used with an external

VCO. A direct PFD input pin is provided to support

offset mixing for low spurious transmission.

–

Programmable input multiplier

Direct PFD input for offset mixing support

•

< 5-µs fast VCO calibration time

Mute pin with 200-ns mute/unmute time

–40-dBc VCO leakage with doubler enabled

Support for external VCO up to 22 GHz

Synchronization of output phase across multiple

devices

•

Two differential RF outputs and one differential

SYSREF output for JESD204B support

The device runs from a single 3.3-V supply and has

integrated LDOs that eliminate the need for onboard

low-noise LDOs.

2 Applications

•

Radar and electronic warfare

Device Information⁽¹⁾

5G and mm-Wave wireless infrastructure

Microwave backhaul

PART NUMBER

PACKAGE

BODY SIZE (NOM)

Test and measurement equipment

High-speed data converter clocking

LMX2820

VQFN (48)

7.00 mm × 7.00 mm

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

the end of the data sheet.

Functional Block Diagram

OSCIN_P

OSCIN_N

÷1,2,..4095

÷1,2,..255

RFOUTA_P

RFOUTA_N

Charge

Pump

÷2,4,8,..,128

PFD

×2

x3,x4..x7

÷2

×2

MUTE

Lock

Detection

RFOUTB_P

RFOUTB_N

÷2,4,8,..,128

N Divider

MUXOUT

SRREQ_P

SRREQ_N

CS#

SCK

SDI

SYSREF

Generation

Digital

Control

Modulator

SROUT_P

SROUT_N

Phase Sync

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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

12 3 4 5 6 7...40

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与LMX2820相关器件

型号	品牌	获取价格	描述	数据表
LMX2820_V01	TI	获取价格	LMX2820 22.4-GHz Wideband PLLatinumâ¢ RF Syn
LMX2820RTCR	TI	获取价格	LMX2820 22.4-GHz Wideband PLLatinumâ¢ RF Syn
LMX2820RTCT	TI	获取价格	LMX2820 22.4-GHz Wideband PLLatinumâ¢ RF Syn
LMX-3+	MINI	获取价格	Double Balanced Mixer, 0.04MHz Min, 400MHz Max, 8dB Conversion Loss-Max
LMX3111TM	TI	获取价格	2000 MHz RF/MICROWAVE UP/DOWN CONVERTER
LMX3111TMX	TI	获取价格	2000 MHz RF/MICROWAVE UP/DOWN CONVERTER
LMX3120M	ETC	获取价格	Microwave/Millimeter Wave Amplifier
LMX3120MX	TI	获取价格	1885 MHz - 1920 MHz RF/MICROWAVE NARROW BAND MEDIUM POWER AMPLIFIER
LMX3150TM	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 2000MHz, PDSO28, PLASTIC, TSSOP-28
LMX3150TMX	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 2000MHz, PDSO28, PLASTIC, TSSOP-28

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