Data Sheet Ultralow Noise VGAs with Preamplifier and Programmable RIN AD8331/AD8332/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 dB to 55.
5 dB in HI gain mode Low output-referred noise: 48 nV/√Hz typical Active input impedance matching Optimized for 10-bit/12-bit ADCs Selectable output clamping level Single 5 V supply operation AD8332 and AD8334 available in lead frame chip scale package APPLICATIONS Ultrasound and sonar time-gain...

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