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VCA2618 Dataheets PDF



Part Number VCA2618
Manufacturers Burr-Brown Corporation
Logo Burr-Brown Corporation
Description Dual/ VARIABLE GAIN AMPLIFIER with Input Buffer
Datasheet VCA2618 DatasheetVCA2618 Datasheet (PDF)

VCA2618 VCA 261 8 SBOS254B – JULY 2002 – REVISED NOVEMBER 2003 Dual, VARIABLE GAIN AMPLIFIER with Input Buffer FEATURES z z z z z z GAIN RANGE: up to 43dB 30MHz BANDWIDTH LOW CROSSTALK: 65dB at Max Gain, 5MHz HIGH-SPEED VARIABLE GAIN ADJUST POWER SHUTDOWN MODE HIGH IMPEDANCE INPUT BUFFER DESCRIPTION The VCA2618 is a highly integrated, dual receive channel, Variable Gain Amplifier (VGA) with analog gain control. The VCA2618’s VGA section consists of two parts: the Voltage Controlled Attenuator.

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VCA2618 VCA 261 8 SBOS254B – JULY 2002 – REVISED NOVEMBER 2003 Dual, VARIABLE GAIN AMPLIFIER with Input Buffer FEATURES z z z z z z GAIN RANGE: up to 43dB 30MHz BANDWIDTH LOW CROSSTALK: 65dB at Max Gain, 5MHz HIGH-SPEED VARIABLE GAIN ADJUST POWER SHUTDOWN MODE HIGH IMPEDANCE INPUT BUFFER DESCRIPTION The VCA2618 is a highly integrated, dual receive channel, Variable Gain Amplifier (VGA) with analog gain control. The VCA2618’s 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 VCA2618 also features low crosstalk and outstanding distortion performance. The combination of low noise and gain range programmability make the VCA2618 a versatile building block in a number of applications where noise performance is critical. The VCA2618 is available in a TQFP-32 package. CP2A CP1A APPLICATIONS z z z z ULTRASOUND SYSTEMS WIRELESS RECEIVERS TEST EQUIPMENT RADAR VCA2618 (1 of 2 Channels) NOUTA Voltage Control Attenuator Programmable Gain Amplifier INA Buffer POUTA MGS1 VCACNTL Analog Control Maximum Gain Select MGS2 MGS3 Maximum Gain Select NOUTB Voltage Control Attenuator Programmable Gain Amplifier INB Buffer POUTB CP2B CP1B Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. 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. Copyright © 2002–2003, Texas Instruments Incorporated www.ti.com ABSOLUTE MAXIMUM RATINGS(1) Power Supply (+VS) ............................................................................. +6V Analog Input ............................................................. –0.3V to (+VS + 0.3V) Logic Input ............................................................... –0.3V to (+VS + 0.3V) Case Temperature ......................................................................... +100°C Junction Temperature .................................................................... +150°C Storage Temperature ...................................................... –40°C to +150°C NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION PACKAGE DESIGNATOR(1) PBS SPECIFIED TEMPERATURE RANGE –40°C to +85°C PACKAGE MARKING VCA2618Y ORDERING NUMBER VCA2618YT VCA2618YR TRANSPORT MEDIA, QUANTITY Tape and Reel, 250 Tape and Reel, 2000 PRODUCT VCA2618Y PACKAGE-LEAD TQFP-32 Surface-Mount " " " " " NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com. ELECTRICAL CHARACTERISTICS At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground differential output (2VPP), MGS = 111, and fIN = 5MHz, unless otherwise noted. VCA2618Y PARAMETER BUFFER Input Resistance Input Capacitance Input Bias Current Maximum Input Voltage Input Voltage Noise Input Current Noise Noise Figure Bandwidth CONDITIONS MIN TYP MAX UNITS kΩ pF nA VPP nV/Hz fA/Hz dB MHz VPP MHz V/µs V Ω mA dBc dBc dBc dB ns dBc dB ns dB/V dB dB mV V MΩ µs 5.25 150 V mW mW PGA Gain = 45dB, RS = 50Ω Independent of Gain RF = 550Ω, PGA Gain = 45dB, RS = 75Ω 600 5 1 1 5.4 350 13 100 1 30 300 2.5 ±1 1 ±40 –50 –50 –60 –40 to –45 5 –59 65 13 16 ±2.0 ±1.3 ±50 0.2 to 3.0 1 0.2 4.75 5.0 120 9.2 PROGRAMMABLE VARIABLE GAIN AMPLIFIER Peak Input Voltage –3dB Bandwidth Slew Rate Output Signal Range RL > 500Ω Each Side to Ground Output Impedance Output Short-Circuit Current 3rd-Harmonic Distortion VOUT = 2VPP, VCACNTL = 3.0V 2nd-Harm.


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