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Details, datasheet, quote on part number:VCA2616YT
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Datasheet text preview:
VCA 261 6
VCA2616 VCA2611
SBOS234D MARCH 2002 REVISED APRIL 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
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ABSOLUTE MAXIMUM RATINGS(1)
Power Supply (+VS) ........... +6V 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
PACKAGE MARKING VCA2616
ORDERING NUMBER VCA2616YT VCA2616YR VCA2611Y/250 VCA2611Y/2K
TRANSPORT MEDIA, QUANTITY Tape and Reel, 250 Tape and Reel, 2000 Tape and Reel, 250 Tape and Reel, 2000
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VCA2611
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TQFP-48
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PFB
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40°C to +85°C
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VCA2611
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NOTE: (1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.
ELECTRICAL CHARACTERISTICS
At TA = +25°C, VDDA = VDDB = VDDR = +5V, load resistance = 500 on each output to ground, MGS = 011, LNP = 22dB and fIN = 5MHz, unless otherwise noted. The input to the preamp (LNP) is single-ended, and the output from the VCA is single-ended, unless otherwise noted. VCA2616Y, VCA2611Y PARAMETER PREAMPLIFIER Input Resistance Input Capacitance Input Bias Current CMRR Maximum Input Voltage Input Voltage Noise(1) Input Current Noise Noise Figure, RS = 75, RIN = 75(1) Bandwidth CONDITIONS MIN TYP 600 15 1 50 1 112 4.2 0.95 0.35 6.2 80 2 40 300 2 1 ±40 71 63 75 75 66 ±2 2.5 10.9 ±50 21 50 0.2 to 3.0 1 0.2 40 4.75 Operating, Both Channels +85 5.25 495 ±1(2) 24 53 MAX UNITS k pF nA dB VPP mVPP nV/ H z nV/ Hz pA/ Hz dB MHz VPP MHz V/µs VPP mA dBc dBc dBc dBc dB ns V dB/V dB mV dB dB V M µs °C V mW
f = 1MHz, VCACNTL = 0.2V Preamp Gain = +5dB Preamp Gain = +25dB Preamp Gain = +5dB Preamp Gain = +25dB Independent of Gain RF = 550, Preamp Gain = 22dB, PGA Gain = 39dB Gain = 22dB
PROGRAMMABLE VARIABLE GAIN AMPLIFIER Peak Input Voltage Differential 3dB Bandwidth Slew Rate Output Signal Range RL 500 Each Side to Ground Output Impedance f = 5MHz Output Short-Circuit Current 3rd-Harmonic Distortion f = 5MHz, VOUT = 1VPP, VCACNTL = 3.0V 2nd-Harmonic Distortion f = 5MHz, VOUT = 1VPP, VCACNTL = 3.0V IMD, 2-Tone VOUT = 2VPP, f = 1MHz VOUT = 2VPP, f = 10MHz Crosstalk VCACNTL = 0.2V Group Delay Variation 1MHz < f < 10MHz, Full Gain Range DC Output Level, VIN = 0 ACCURACY Gain Slope Gain Error Output Offset Voltage Total Gain GAIN CONTROL INTERFACE Input Voltage (VCACNTL) Range Input Resistance Response Time POWER SUPPLY Operating Temperature Range Specified Operating Range Power Dissipation NOTES: (1) For preamp driving VGA. (2) Referenced to best fit dB-linear curve.
45 45
VCACNTL = 0.2V VCACNTL = 3.0V
18 47
40dB Gain Change, MGS = 111
5.0 410
2
VCA2616, VCA2611
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SBOS234D
PIN CONFIGURATION
Top View VCAOUTNA VCAOUTPB VCAINSEL VCAOUTNB VCAOUTPA FBSWCNTL TQFP
VCACNTL
GNDA
MGS1
MGS2
48 VDDA NC NC VCAINNA VCAINPA LNPOUTNA LNPOUTPA SWFBA FBA 1 2 3 4 5 6 7 8 9
47
46
45
44
43
42
41
40
MGS3
39
38
37 36 VDDB 35 NC 34 NC 33 VCAINNB 32 VCAINPB
GNDB
31 LNPOUTNB 30 LNPOUTPB 29 SWFBB 28 FBB 27 COMP1B 26 COMP2B 25 LNPINNB 24
VCA2616 VCA2611
COMP1A 10 COMP2A 11 LNPINNA 12 13 14 15 16 17 18 19 20 21 22 23
LNPGS1B
LNPGS2B
LNPGS2A
LNPGS1A
PIN DESCRIPTIONS
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 DESIGNATOR VDDA NC NC VCAINNA VCAINPA LNPOUTNA LNPOUTPA SWFBA FBA COMP1A COMP2A LNPINNA LNPGS3A LNPGS2A LNPGS1A LNPINPA VDDR VBIAS VCM GNDR LNPINPB LNPGS1B LNPGS2B LNPGS3B DESCRIPTION Channel A +Supply Do Not Connect Do Not Connect Channel A VCA Negative Input Channel A VCA Positive Input Channel A LNP Negative Output Channel A LNP Positive Output Channel A Switched Feedback Output Channel A Feedback Output Channel A Frequency Compensation 1 Channel A Frequency Compensation 2 Channel A LNP Inverting Input Channel A LNP Gain Strap 3 Channel A LNP Gain Strap 2 Channel A LNP Gain Strap 1 Channel A LNP Noninverting Input +Supply for Internal Reference 0.01µF Bypass to Ground 0.01µF Bypass to Ground Ground for Internal Reference Channel B LNP Noninverting Input Channel B LNP Gain Strap 1 Channel B LNP Gain Strap 2 Channel B LNP Gain Strap 3 PIN 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 DESIGNATOR LNPINNB COMP2B COMP1B FBB SWFBB LNPOUTPB LNPOUTNB VCAINPB VCAINNB NC NC VDDB GNDB VCAOUTNB VCAOUTPB MGS3 MGS2 MGS1 VCACNTL VCAINSEL FBSWCNTL VCAOUTPA VCAOUTNA GNDA DESCRIPTION Channel B LNP Inverting Input Channel B Frequency Compensation 2 Channel B Frequency Compensation 1 Channel B Feedback Output Channel B Switched Feedback Output Channel B LNP Positive Output Channel B LNP Negative Output Channel B VCA Positive Input Channel B VCA Negative Input Do Not Connect Do Not Connect Channel B +Analog Supply Channel B Analog Ground Channel B VCA Negative Output Channel B VCA Positive Output Maximum Gain Select 3 (LSB) Maximum Gain Select 2 Maximum Gain Select 1 (MSB) VCA Control Voltage VCA Input Select, HI = External Feedback Switch Control: HI = ON Channel A VCA Positive Output Channel A VCA Negative Output Channel A Analog Ground
VCA2616, VCA2611
SBOS234D
LNPGS3B
LNPGS3A
LNPINPB
LNPINPA
VDDR
VBIAS
VCM
GNDR
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