AD8334 Datasheet (Analog Devices)

AD8334, Ultralow Noise VGAs

The AD8331/AD8332/AD8334 are single-, dual-, and quadchannel, ultralow noise linear-in-dB, variable gain amplifiers (VGAs).

Optimized for ultrasound systems, they are usable as a low noise variable gain element at frequencies up to 120 MHz.

Included in each channel are an ultralow noise preamp (LNA)

AD8334 Features

* Ultralow noise preamplifier (preamp) Voltage noise = 0.74 nV/√Hz Current noise = 2.5 pA/√Hz 3 dB bandwidth AD8331: 120 MHz AD8332, AD8334: 100 MHz Low power AD8331: 125 mW/channel AD8332, AD8334: 145 mW/channel Wide gain range with programmable postamp

* 4.5 dB to +43.5 dB in LO gain mode 7.5