DESCRIPTION

The VCA2616 and VCA2611 are dual, Low-Noise Preamplifiers (LNP), plus low-noise Variable Gain Amplifiers (VGA). The VCA2611 is an upgraded version of the VCA2616. The only difference between the VCA2616 and the VCA2611 is the input structure to the LNP. The VCA2616 is limited to –0.3V negativegoing input spikes; the VCA2611 is limited to –2.0V negativegoing input spikes. This change allows the user to use slower and less expensive input clamping diodes prior to the LNP input. In some designs, input clamping may not be required.

FEATURES

● LOW-NOISE PREAMP:

– Low Input Noise: 0.95nV/√Hz

– Active Termination Noise Reduction

– Switchable Termination Value

– 80MHz Bandwidth

– 5dB to 25dB Gain

– Differential In and Out

● LOW-NOISE VARIABLE GAIN AMPLIFIER:

– Low-Noise VCA

– Up to 40dB Gain Range

– 40MHz Bandwidth

– Differential In and Out

● LOW CROSSTALK: 66dB at Max Gain, 5MHz

● HIGH-SPEED VARIABLE GAIN ADJUST

● SWITCHABLE EXTERNAL PROCESSING

APPLICATIONS

● ULTRASOUND SYSTEMS

● WIRELESS RECEIVERS

● TEST EQUIPMENT