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VCA2616 Dataheets PDF



Part Number VCA2616
Manufacturers Burr-Brown
Logo Burr-Brown
Description (VCA2611 / VCA2616) Variable-Gain Amplifier
Datasheet VCA2616 DatasheetVCA2616 Datasheet (PDF)

www.datasheet4u.com VCA 261 6 VCA2616 VCA2611 SBOS234E – MARCH 2002 – REVISED NOVEMBER 2004 Dual, Variable-Gain Amplifier with Low-Noise Preamp FEATURES q 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 q LOW-NOISE VARIABLE GAIN AMPLIFIER: – Low-Noise VCA – Up to 40dB Gain Range – 40MHz Bandwidth – Differential In and Out q LOW CROSSTALK: 66dB at Max Gain, 5MHz q.

  VCA2616   VCA2616


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www.datasheet4u.com VCA 261 6 VCA2616 VCA2611 SBOS234E – MARCH 2002 – REVISED NOVEMBER 2004 Dual, Variable-Gain Amplifier with Low-Noise Preamp FEATURES q 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 q LOW-NOISE VARIABLE GAIN AMPLIFIER: – Low-Noise VCA – Up to 40dB Gain Range – 40MHz Bandwidth – Differential In and Out q LOW CROSSTALK: 66dB at Max Gain, 5MHz q HIGH-SPEED VARIABLE GAIN ADJUST q SWITCHABLE EXTERNAL PROCESSING 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. The combination of Active Termination (AT) and Maximum Gain Select (MGS) allow for the best noise performance. The VCA2616 and VCA2611 also feature low crosstalk and outstanding distortion performance. The LNP has differential input and output capability and is strappable for gains of 5dB, 17dB, 22dB, or 25dB. Low input impedance is achieved by AT, resulting in as much as a 4.6dB improvement in noise figure over conventional shunt termination. The termination value can also be switched to accommodate different sources. The output of the LNP is available for external signal processing. The variable gain is controlled by an analog voltage whose gain varies from 0dB to the gain set by the MGS. The ability to program the variable gain also allows the user to optimize dynamic range. The VCA input can be switched from the LNP to external circuits for different applications. The output can be used in either a single-ended or differential mode to drive highperformance Analog-to-Digital (A/D) converters, and is cleanly limited for optimum overdrive recovery. Maximum Gain Select VCACNTL MGS1 MGS2 MGS3 APPLICATIONS q ULTRASOUND SYSTEMS q WIRELESS RECEIVERS q TEST EQUIPMENT FBCNTL RF2 RF1 LNPOUTN VCAINN FBSW FB VCA2616 (1 of 2 Channels) Analog Control Maximum Gain Select The combination of low noise, gain, and gain range programmability makes the VCA2616 and VCA2611 versatile building blocks in a number of applications where noise performance is critical. The VCA2616 and VCA2611 are available in a TQFP-48 package. Input LNPINP VCAOUTN LNPGS1 LNPGS2 LNPGS3 LNPINN VCAOUTP Programmable Gain Amplifier 24 to 45dB LNP Gain Set Low Noise Preamp 5dB to 25dB Voltage Controlled Attenuator LNPOUTP VCAINP SEL 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 © 2002-2004, Texas Instruments Incorporated www.ti.com ABSOLUTE MAXIMUM RATINGS(1) Power Supply (+VS) ............................................................................. +6V www.datasheet4u.com VCA2616 Analog Input ............................................ –0.3V to (+VS + 0.3V) VCA2611 Analog Input ............................................ –2.0V 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(1) PACKAGE DESIGNATOR PFB SPECIFIED TEMPERATURE RANGE –40°C to +85°C PRODUCT VCA2616 PACKAGE-LEAD TQFP-48 PACKA.


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