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LMH6517

更新时间： 2024-11-25 11:10:47
品牌 Logo 应用领域
德州仪器 - TI 驱动驱动器
页数 文件大小 规格书
37页 1089K
描述
具有数字控制增益的低功耗、低噪声 IF 和基带双路 16 位 ADC 驱动器

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LMH6517 数据手册

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LMH6517  
www.ti.com  
SNOSB19K –NOVEMBER 2008–REVISED MARCH 2013  
Low Power, Low Noise, IF and Baseband, Dual 16 bit ADC Driver With Digitally Controlled  
Gain  
Check for Samples: LMH6517  
1
FEATURES  
DESCRIPTION  
The LMH6517 contains two high performance,  
digitally controlled variable gain amplifiers (DVGA). It  
has been designed for use in narrowband and  
broadband IF sampling applications. Typically the  
LMH6517 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 automatic gain control (AGC) is  
required to increase system dynamic range.  
2
•
Accurate, 0.5dB Gain Steps  
•
•
•
•
•
•
•
•
200Ω Resistive, Differential Input  
Low Impedance, Differential Output  
Disable Function for Each Channel  
Parallel Gain Control  
SPI Compatible Serial Bus  
Two Wire, Pulse Mode Control  
On Chip Register Stores Gain Setting  
Each channel of LMH6517 has an independent,  
digitally controlled attenuator and a high linearity,  
differential output amplifier. Each block has been  
optimized for low distortion and maximum system  
design flexibility. Each channel can be individually  
disabled for power savings.  
Low Sensitivity of Linearity and Phase to Gain  
Setting  
•
•
Single 5V Supply Voltage  
Small Footprint WQFN Package  
The LMH6517 digitally controlled attenuator provides  
precise 0.5dB gain steps over a 31.5dB range. On  
chip digital latches are provided for local storage of  
the gain setting. Both serial and parallel programming  
options are provided. A Pulse mode is also offered  
where simple up or down commands can change the  
gain one step at a time.  
APPLICATIONS  
•
•
•
•
•
Cellular Base Stations  
IF Sampling Receivers  
Instrumentation  
Modems  
Imaging  
The output amplifier has a differential output allowing  
large signal swings on a single 5V supply. The low  
impedance output provides maximum flexibility when  
driving filters or analog to digital converters.  
KEY SPECIFICATIONS  
•
•
•
•
•
•
OIP3: 43dBm @ 200MHz  
Noise figure 5.5dB  
The LMH6517 operates over the industrial  
temperature range of −40°C to +85°C. The LMH6517  
is available in a 32-Pin, thermally enhanced, WQFN  
package.  
Gain step size of 0.5dB  
Gain step accuracy: 0.05dB  
Frequency Range of 1200 MHz  
Supply current 80mA per channel  
Typical Application: IF Sampling Receiver  
V
CC  
½ LMH6517  
RF  
200  
ADC  
LO  
6
GAIN 0-5  
LATCH  
1
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.  
2
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.  
Copyright © 2008–2013, Texas Instruments Incorporated  
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LMH6517 替代型号

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