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LMH6518
SNOSB21D – MAY 2008 – REVISED SEPTEMBER 2016
LMH6518 900 MHz, Digitally Controlled, Variable Gain Amplifier
1 Features
3 Description
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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.
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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:
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