LMH6518 - National Semiconductor

LMH6518 Variable Gain Amplifier

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).

Features

■ Gain range
■ Gain step size
■ Combined gain resolution with
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■ 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 Applications
■ Oscilloscope programmable gain amplifier
■ Differential ADC drivers
■ High frequency single ended input to differential conversion
■ Precision gain control applications
■ Medical applications
■ RF/ IF applications Functi.