Digital variable gain amplifier optimised to provide high bandwidth, low distortion and low noise

Texas Instruments LMH2832 digital variable gain amplifier, stocked by Mouser, is a high-linearity, dual-channel, digital variable gain amplifier for high-speed signal chain and data-acquisition systems. The device is optimised to provide high bandwidth, low distortion, and low noise. This optimisation makes this device ideally suited as a dual, 14-bit, ADC driver. The device consists of one fixed-gain block and one variable attenuator consisting of a total gain of 30dB with a maximum attenuation of 39dB. The gain range is from 30dB to –9dB in 1dB gain steps with a gain accuracy of ±0.2dB. The device is designed to drive general-purpose ADCs and also meets the requirements for both data over cable service interface specifications (QAM and OFDM systems). With excellent NF (6.5dB) and linearity, the device is designed to perform to within DOCSIS specifications.