Application Notes
VCA8617: Response to Step-Change in Gain Control
Texas Instruments
Published : 24 Mar 05
Description
The VCA8617 is an 8-channel variable gain amplifier ideally suited for portable and mid-range ultrasound applications. Each channel consists of a Low Noise Amplifier (LNA) and a Variable Gain Amplifier (VGA). The VGA contains two parts: a voltage-controlled attenuator (VCA) and a programmable gain amplifier (PGA). The PGA output feeds directly into an integrated 3-pole low-pass Butterworth filter.
Parts
Part Number
Name
Companion Part
Application Note
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