产品详情

Features Digital Gain Set, Integrated Clamps, Single-ended to Differential conversion PGA/VGA PGA Number of channels 1 Vs (max) (V) 5.25 Vs (min) (V) 4.75 BW at Acl (MHz) 900 Acl, min spec gain (V/V) 0.87 Slew rate (typ) (V/µs) 760 Iq per channel (typ) (mA) 210 Gain (max) (dB) 38.8 Rating Catalog Architecture Fully Differential ADC Driver Operating temperature range (°C) -40 to 85
Features Digital Gain Set, Integrated Clamps, Single-ended to Differential conversion PGA/VGA PGA Number of channels 1 Vs (max) (V) 5.25 Vs (min) (V) 4.75 BW at Acl (MHz) 900 Acl, min spec gain (V/V) 0.87 Slew rate (typ) (V/µs) 760 Iq per channel (typ) (mA) 210 Gain (max) (dB) 38.8 Rating Catalog Architecture Fully Differential ADC Driver Operating temperature range (°C) -40 to 85
WQFN (RGH) 16 16 mm² 4 x 4
  • Gain Range: 40 dB
  • Gain Step Size: 2 dB
  • Combined Gain Resolution With Gsps ADCs:
    8.5 mdB
  • Minimum Gain: −1.16 dB
  • Maximum Gain: 38.8 dB
  • −3 dB BW: 900 MHz
  • Rise and Fall Time: <500 ps
  • Recovery Time: <5 ns
  • Propagation Delay Variation: 100 ps
  • HD2 at 100 MHz: −50 dBc
  • HD3 at 100 MHz: −53 dBc
  • Input-Referred Noise (Maximum Gain): 0.98 nV/√Hz
  • Overvoltage Clamps for Fast Recovery
  • Power Consumption: Auxiliary Turned Off 1.1 W to 0.75 W
  • Gain Range: 40 dB
  • Gain Step Size: 2 dB
  • Combined Gain Resolution With Gsps ADCs:
    8.5 mdB
  • Minimum Gain: −1.16 dB
  • Maximum Gain: 38.8 dB
  • −3 dB BW: 900 MHz
  • Rise and Fall Time: <500 ps
  • Recovery Time: <5 ns
  • Propagation Delay Variation: 100 ps
  • HD2 at 100 MHz: −50 dBc
  • HD3 at 100 MHz: −53 dBc
  • Input-Referred Noise (Maximum Gain): 0.98 nV/√Hz
  • Overvoltage Clamps for Fast Recovery
  • Power Consumption: Auxiliary Turned Off 1.1 W to 0.75 W

The LMH6518 device is a digitally controlled variable gain amplifier whose total gain is varied from −1.16 dB to 38.8 dB for a 40 dB range in 2-dB steps. The −3-dB bandwidth is 900 MHz at all gains. Gain accuracy at each setting is typically 0.1 dB. When used in conjunction with TI's Gsample/second (Gsps) ADC with adjustable full-scale (FS) range, the LMH6518 gain adjustment accommodates full scale input signals from 6.8 mVPP to 920 mVPP to get 700 mVPP nominal at the ADC input. The auxiliary output (+OUT AUX and −OUT AUX) follows the main output and is intended for use in oscilloscope trigger function circuitry but may have other uses in other applications.

The LMH6518 gain is programmed through a SPI-1 compatible serial bus. A signal path combined gain resolution of 8.5 mdB is achieved when the device's gain and the Gsps ADC’s FS input are both manipulated. Inputs and outputs are DC-coupled. The outputs are differential with individual common mode (CM) voltage control (for main and auxiliary outputs), and have a selectable bandwidth limiting circuitry (common to both main and auxiliary) of 20, 100, 200, 350, 650, 750 MHz or full bandwidth.

The LMH6518 device is a digitally controlled variable gain amplifier whose total gain is varied from −1.16 dB to 38.8 dB for a 40 dB range in 2-dB steps. The −3-dB bandwidth is 900 MHz at all gains. Gain accuracy at each setting is typically 0.1 dB. When used in conjunction with TI's Gsample/second (Gsps) ADC with adjustable full-scale (FS) range, the LMH6518 gain adjustment accommodates full scale input signals from 6.8 mVPP to 920 mVPP to get 700 mVPP nominal at the ADC input. The auxiliary output (+OUT AUX and −OUT AUX) follows the main output and is intended for use in oscilloscope trigger function circuitry but may have other uses in other applications.

The LMH6518 gain is programmed through a SPI-1 compatible serial bus. A signal path combined gain resolution of 8.5 mdB is achieved when the device's gain and the Gsps ADC’s FS input are both manipulated. Inputs and outputs are DC-coupled. The outputs are differential with individual common mode (CM) voltage control (for main and auxiliary outputs), and have a selectable bandwidth limiting circuitry (common to both main and auxiliary) of 20, 100, 200, 350, 650, 750 MHz or full bandwidth.

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类型 标题 下载最新的英语版本 日期
* 数据表 LMH6518 900 MHz, Digitally Controlled, Variable Gain Amplifier 数据表 (Rev. D) PDF | HTML 2016年 9月 30日
电子书 The Signal e-book: 有关运算放大器设计主题的博客文章汇编 英语版 2018年 1月 31日
应用手册 AN-1718 Differential Amplifier Applications Up to 400 MHz (Rev. B) 2013年 5月 1日
应用手册 AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) 2013年 5月 1日
EVM 用户指南 AN-1906 LMH6518 Evaluation Board (Rev. B) 2013年 5月 1日
应用手册 Using High Speed Diff Amp to Drive ADCs (Rev. A) 2013年 4月 26日
更多文献资料 Featured High Speed Differential Amplifiers 2012年 10月 23日
应用手册 Application Note 1718 Differential Amplifier Applications Up to 400 MHz (cn) 2007年 11月 14日
应用手册 A Walk Along the Signal Path (High-Speed Signal Path) 2005年 3月 30日

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SNOC007 LMH6518 GUI Set Up Files

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可编程和可变增益放大器(PGA 和 VGA)
LMH6518 900MHz、数字控制、可变增益放大器
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LMH6518DESIGN-CALC — LMH6518 应用信息 FS 增益 ECM 计算器

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用户指南: PDF
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WQFN (RGH) 16 查看选项

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  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
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