VCA2619 Datasheet, PDF (1/19 Pages) Burr-Brown (TI) – Dual, Variable Gain Amplifier with Input Buffer

VCA2619
SBOS276A − AUGUST 2003 − REVISED AUGUST 2003
Dual, Variable Gain Amplifier
with Input Buffer
FEATURES
D GAIN RANGE: 50dB
D LOW CROSSTALK: -60dB at Max Gain,
f_IN = 5MHz
D HIGH−SPEED VARIABLE GAIN ADJUST
D POWER SHUTDOWN MODE
D HIGH IMPEDANCE INPUT BUFFER
APPLICATIONS
D ULTRASOUND SYSTEMS
D WIRELESS RECEIVERS
D TEST EQUIPMENT
D RADAR
DESCRIPTION
The VCA2619 is a highly integrated, dual receive channel,
Variable Gain Amplifier (VGA) with analog gain control.
The VCA2619s VGA section consists of two parts: the
Voltage Controlled Attenuator (VCA) and the Programmable
Gain Amplifier (PGA). The gain and gain range of the PGA
can be digitally programmed. The combination of these two
programmable elements results in a variable gain ranging
from 0dB up to a maximum gain as defined by the user
through external connections. The single−ended unity gain
input buffer provides predictable high input impedance. The
output of the VGA can be used in either a single−ended or
differential mode to drive high−performance Analog−to−
Digital (A/D) converters. A separate power−down pin
reduces power consumption.
The VCA2619 also features low crosstalk and outstanding
distortion performance. The combination of low noise and
gain range programmability make the VCA2619 a versatile
building block in a number of applications where noise
performance is critical. The VCA2619 is available in a
TQFP−32 package.
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PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
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