Datasheet > L6514SQ

L6514SQ

更新时间： 2024-09-24 03:49:55

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
20页	523K
描述
600 MHz, Digital Controlled, Variable Gain Amplifier

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

L6514SQ 数据手册

January 24, 2008

LMH6514

600 MHz, Digital Controlled, Variable Gain Amplifier

General Description

Features

The LMH6514 is a high performance, digitally controlled vari-

able gain amplifier (DVGA). It combines precision gain control

with a low noise, ultra-linear, differential amplifier. Typically,

the LMH6514 drives a high performance ADC in a broad

range of mixed signal and digital communication applications

such as mobile radio and cellular base stations where auto-

matic gain control (AGC) is required to increase system dy-

namic range. When used in conjunction with a high speed

ADC, system dynamic range can be extended by up to 42 dB.

Adjustable gain with a 42 dB range

■

Precise 6.02 dB gain steps

Parallel 3 bit gain control

On chip register gain setting

Fully differential signal path

Single ended to differential capable

200Ω input impedance

Small footprint (4 mm x 4 mm) LLP package

The LMH6514 has a differential input and output allowing

large signal swings on a single 5V supply. It is designed to

accept signals from RF elements and maintain a terminated

impedance environment. The input impedance is 200Ω re-

sistive. The output impedance is either 200Ω or 400Ω and is

user selectable. A unique internal architecture allows use with

both single ended and differential input signals.

Key Specifications

600 MHz bandwidth at 100Ω load

39 dBm OIP3 at 75 MHz, 200Ω load

26 dB to 38 dB maximum gain

Selectable output impedance of 200Ω or 400Ω.

8.3 dB noise figure

■

Input signals to the LMH6514 are scaled by a highly linear,

digitally controlled attenuator with seven accurate 6 dB steps.

The attenuator output provides the input signal for a high gain,

ultra linear differential transconductor. The transconductor

differential output current can be converted into a voltage by

using the on-chip 200Ω or 400Ω loads. The transconductance

gain is 0.1 Amp/Volt resulting in a maximum voltage gain of

+32 dB when driving a 200Ω load, or 38 dB when driving the

400Ω load. On chip digital latches are provided for local stor-

age of the gain setting. The gain step settling time is 5 ns and

care has been taken to reduce the sensitivity of bandwidth

and phase to gain setting.

5 ns gain step switching time

100 mA supply current

Applications

Cellular base stations

■

IF sampling receivers

Instrumentation

Modems

Imaging

The LMH6514 operates over the industrial temperature range

of −40°C to +85°C. The LMH6514 is available in a 16-Pin,

thermally enhanced, LLP package.

Differential line receiver

Typical Application

30042901

LMH™ is a trademark of National Semiconductor Corporation.

300429

www.national.com

12 3 4 5 6 7...20

中文翻译

下载PDF

与L6514SQ相关器件

型号	品牌	获取价格	描述	数据表
L6515	STMICROELECTRONICS	获取价格	DUAL DC-MOTOR POSITIONING SYSTEM
L6515SQ	NSC	获取价格	600 MHz, Digital Controlled, Variable Gain Amplifier
L651C	ETC	获取价格	THYRISTOR MODULE\|AC SWITCH\|120V V(RRM)\|46A I(T)
L651F	CRYDOM	获取价格	Power Modules
L652	CRYDOM	获取价格	Power Modules
L6520	STMICROELECTRONICS	获取价格	Highly integrated ballast controller for TL and CFL
L6521	STMICROELECTRONICS	获取价格	Highly integrated ballast controller for TL and CFL
L6521TR	STMICROELECTRONICS	获取价格	Highly integrated ballast controller for TL and CFL
L65240F	ETC	获取价格	Low Profile Designed for PCB Connections
L65280F	ETC	获取价格	Low Profile Designed for PCB Connections

与L6514SQ相关文章

SK海力士量产12层HBM3E，容量高达36GB
2024-09-27

6
意法半导体传感器驱动Sphere，开启沉浸式电影新时代
2024-09-27

11
摩尔斯微电子在美国约书亚树国家公园测试 Wi-Fi HaLow
2024-09-18

79
贸泽上架Tallysman TW5386智能GNSS天线
2024-09-18

71

产品中心

服务支持

精选活动

关于我们

帮助中心

L6514SQ

L6514SQ 数据手册

与L6514SQ相关器件

与L6514SQ相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

L6514SQ

L6514SQ 数据手册

与L6514SQ相关器件

与L6514SQ相关文章

您还可以找

您在本页遇到什么问题？