Datasheet > LMH2190

LMH2190

更新时间： 2024-09-15 11:11:47

品牌	Logo	应用领域
德州仪器 - TI		时钟驱动驱动器
页数	文件大小	规格书
31页	944K
描述
具有 I2C 接口的四通道 27MHz 时钟树驱动器

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LMH2190 数据手册

LMH2190

www.ti.com

SNAS473H –JUNE 2009–REVISED MAY 2013

LMH2190 Quad Channel 27 MHz Clock Tree Driver with I²C Interface

Check for Samples: LMH2190

FEATURES

DESCRIPTION

The LMH2190 is a quad channel configurable clock

tree driver which supplies a digital system clock to

peripherals in mobile handsets or other applications.

It provides a solution to clocking issues such as

limited drive capability for fanout or longer traces,

protection of the master clock from varying loads and

frequency pulling effects, isolation buffering from

noisy modules, and crosstalk isolation. It has very low

phase noise which enables it to drive sensitive

modules such as Wireless LAN and Bluetooth.

•

1 Input Clock, 4 Output Clocks

Supports both Square or Sine Wave Input

1.8V Square Wave Clock Outputs

Skewed Clock Outputs

Independent Clock Request

High Isolation of Supply Noise to Clock Input

High Output to Output Isolation

Output Drive up to 50 pF

The LMH2190 can be clocked up to 27 MHz, and has

an independent clock request pin for each clock

output which allows the peripheral to control the

clock. It features an integrated LDO which provides

an ultra low noise voltage supply with 10 mA external

load current which can be used to supply the TCXO

or other clock source.

The I²C serial interface can be used to override the

default configuration of the device to optimize the

LMH2190 for the application. Some of these

programmable features include setting the polarity of

both the clock and the clock request inputs. In

addition, the clock outputs have programmable output

drive current to optimize for the connected load. EMI

switching noise can be controlled by configuring

output drive and skew settings.

EMI Controlled Output Edges and EMI Filtering

Integrated 1.8V Low-Dropout Regulator

–

Low Output Noise Voltage

–

10 mA load Current

•

I²C Configurable up to 400 kHz (Fast Mode)

Ultra Low Standby Current

V_BATRange = 2.5V to 5.5V

APPLICATIONS

•

Mobile Handsets

PDAs

Portable Equipment

The LMH2190 quad clock distributor is offered in a

tiny 1.61mm x 1.61mm 16 bump DSBGA package. Its

small size and low supply current make it ideal for

portable applications.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...31

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与LMH2190相关器件

型号	品牌	获取价格	描述	数据表
LMH2190TM-38	NSC	获取价格	Quad Channel 27 MHz Clock Tree Driver with I2C Interface
LMH2190TM-38/NOPB	TI	获取价格	具有 I2C 接口的四通道 27MHz 时钟树驱动器 \| YFQ \| 16 \| -20 t
LMH2190TMX-38	NSC	获取价格	Quad Channel 27 MHz Clock Tree Driver with I2C Interface
LMH2191	NSC	获取价格	Evaluation Board for the Dual Channel 52 MHz Clock Tree Driver
LMH2191	TI	获取价格	双通道 52MHz 时钟树驱动器
LMH2191TME/NOPB	TI	获取价格	双通道 52MHz 时钟树驱动器 \| YFX \| 8 \| -40 to 85
LMH2191TMX/NOPB	TI	获取价格	双通道 52MHz 时钟树驱动器 \| YFX \| 8 \| -40 to 85
LMH2832	TI	获取价格	全差分、双路、1.1GHz 数字可变增益放大器
LMH2832IRHAR	TI	获取价格	全差分、双路、1.1GHz 数字可变增益放大器 \| RHA \| 40 \| -40 to 8
LMH2832IRHAT	TI	获取价格	全差分、双路、1.1GHz 数字可变增益放大器 \| RHA \| 40 \| -40 to 8

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