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LMH6518 - Variable Gain Amplifier

Description

The LMH6518 is a digitally controlled variable gain amplifier whose total gain can be varied from

1.16 dB to 38.84 dB for a 40 dB range in 2 dB steps.

3 dB bandwidth is 825 MHz at all gains.

Gain accuracy at each setting is typically 0.1 dB.

Features

  • Gain range.
  • Gain step size.
  • Combined gain resolution with.
  • Gsample/second ADC’s Min gain Max gain.
  • 3 dB BW Rise/fall time Recovery time Propagation delay variation HD2 @ 100 MHz HD3 @ 100 MHz Input-referred noise (max gain) Power consumption 40 dB 2 dB 8.5 mdB.
  • 1.16 dB 38.84 dB 825 MHz 500 ps 5 ns 100 ps.
  • 50 dBc.
  • 53 dBc 0.93 nV/√Hz 1.1W.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LMH6518 825 MHz, Digital Controlled, Variable Gain Amplifier www.DataSheet4U.com PRELIMINARY May 30, 2008 LMH6518 825 MHz, Digital Controlled, Variable Gain Amplifier General Description The LMH6518 is a digitally controlled variable gain amplifier whose total gain can be varied from −1.16 dB to 38.84 dB for a 40 dB range in 2 dB steps. The −3 dB bandwidth is 825 MHz at all gains. Gain accuracy at each setting is typically 0.1 dB. When used in conjunction with a National Semiconductor Gsample/second (Gsps) ADC with adjustable full scale (FS) range, the LMH6518 gain adjustment will accommodate full scale input signals from 6.8 mVPP to 920 mVPP. The LMH6518 gain is programmed via a SPI-1 serial bus. A signal path combined gain resolution of 8.
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