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LMH6518SQ/NOPB

Special Purpose Amplifiers 900MHz, Digitally Controlled, Variable Gain Amplifier 16-WQFN -40℃ to 85℃

  • Package/Case :
  • QFN-16
  • Product Categories :
  • Special Purpose Amplifiers
  • RoHs Status:
  • Green
  • Marking Code:
  • L6518SQ
  • In-stock:
  • 548

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LMH6518SQ/NOPB Product Details

The LMH6518SQ/NOPB 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 LMH6518SQ/NOPB 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 LMH6518SQ/NOPB 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.

LMH6518SQ/NOPB

Feature

  • 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
Description

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.

LMH6518SQ/NOPB Block Diagram
(Picture: Diagram)

Technical Parameters

  • Number of Channels
  • 1
  • Common Mode Rejection Ratio (Min)
  • 40 dB
  • Operating Supply Voltage
  • 3.3 V, 5 V
  • Supply Current
  • 225 mA at 5 V
  • Maximum Operating Temperature
  • + 85 C
  • Minimum Operating Temperature
  • - 40 C
  • Package / Case
  • LLP EP
  • Packaging
  • Reel
  • Available Set Gain
  • 40 dB
  • Series
  • LMH6518
  • Factory Pack Quantity
  • 1000
  • Supply Voltage Max
  • 5.25 V
  • Supply Voltage Min
  • 3.135 V

LMH6518SQ/NOPB Documents

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  • **AFEL***
    2020-03-08

    The ICs arrived well packaged and on time.

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Texas Instruments, Inc

TI
Texas Instruments Incorporated designs and manufactures analog technologies, digital signal processing (DSP) and microcontroller (MCU) semiconductors. TI is a leader in semiconductor solutions for analog and digital embedded and applications processing....
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