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Details, datasheet, quote on part number:VCA2618YT
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| Part: | VCA2618YT |
| Category: | Analog & Mixed-Signal Processing => Amplifiers => PGA (Programmable Gain Amplifiers) => Variable Gain |
| Description: | ti VCA2618, Dual, Variable Gain Amplifier With Input Buffer |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download VCA2618YT datasheet File size : 331 kB |
| Request For quote: | Find where to buy VCA2618YT
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Datasheet text preview:
VCA
VCA2618
261 8
SBOS254B JULY 2002 REVISED NOVEMBER 2003
Dual, VARIABLE GAIN AMPLIFIER with Input Buffer
FEATURES
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
ULTRASOUND SYSTEMS WIRELESS RECEIVERS TEST EQUIPMENT RADAR
(
VCA2618 1 of 2 Channels) NOUTA Voltage C A ontrol ttenuator Programmable G ain Amplifier POUTA
INA
Buffer
VCACNTL
Cnalog A ontrol
Maximum Gain Select
MGS1 MGS2 MGS3
G Maximum ain Select
NOUTB Voltage C A ontrol ttenuator Programmable G ain Amplifier POUTB
INB
Buffer
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 © 20022003, 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
PRODUCT VCA2618Y PACKAGE-LEAD TQFP-32 Surface-Mount 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
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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 = 500 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 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 Operating, Each Channel 5.0 120 9.2 5.25 150 MAX UNITS k pF nA VPP nV/Hz fA/Hz dB MHz VPP MHz V/µs V mA dBc dBc dBc dB ns dBc dB ns dB/V dB dB mV V M µs V mW mW
PGA Gain = 45dB, RS = 50 Independent of Gain RF = 550, PGA Gain = 45dB, RS = 75
PROGRAMMABLE VARIABLE GAIN AMPLIFIER Peak Input Voltage 3dB Bandwidth Slew Rate Output Signal Range RL > 500 Each Side to Ground Output Impedance Output Short-Circuit Current 3rd-Harmonic Distortion VOUT = 2VPP, VCACNTL = 3.0V 2nd-Harmonic Distortion VOUT = 2VPP, VCACNTL = 3.0V VOUT = 2VPP, VCACNTL = 3.0V, MGS = 011 2nd-Harmonic Distortion Overload Performance (2nd-Harmonic Input Signal = 1VPP, VCACNTL = 2V Distortion) Time Delay IMD, 2-Tone VOUT = 2VPP, f = 9.95MHz Crosstalk Group Delay Variation 1MHz < f < 10MHz, Full Gain Range A CCURACY Gain Slope Gain Error(1) Output Offset Voltage GAIN CONTROL INTERFACE Input Voltage (VCACNTL) Range Input Resistance Response Time POWER SUPPLY Specified Operating Range Power Dissipation Power-Down NOTE: (1) Referenced to best fit dB-linear curve. VCACNTL = 0.2V to 3.0V VCACNTL = 0.2V to 3.0V VCACNTL = 0.4V to 2.9V
45 42
±2
45dB Gain Change
2
VCA2618
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SBOS254B
PIN CONFIGURATION
Top View NOUTA GNDA POUTA TQFP
32
31
30
29
28
VDDA
DNC
CP2A
CP1A
NC
27
26
+INA NC VDDR VB I A S VC M GNDR NC +INB
1 2 3 4 VCA2618 5 6 7 8
25
24 23 22 21 20 19 18 17
VCACNTL MGS3 MGS2 MGS1 PD NC NC DNC
10
11
12
13
14
15 POUTB
PIN DESCRIPTIONS
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DESIGNATOR +INA NC VDDR V BIAS VC M G N DR NC +INB NC DNC CP2B CP1B VDDB G N DB POUTB NOUTB DESCRIPTION Noninverting Input Channel A No Internal Connection Internal Reference Supply Bias Voltage Common-Mode Voltage Internal Reference Ground Not Connected Noninverting Input Channel B No Internal Connection Do Not Connect Coupling Capacitor Channel B Coupling Capacitor Channel B +5V Supply Channel B Ground Channel B Positive Output Channel B Negative Output Channel B PIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 DESIGNATOR DNC NC NC PD MGS1 MGS2 MGS3 V C AC N T L NOUTA POUTA G N DA VDDA CP1A CP2A DNC NC DESCRIPTION Do Not Connect No Internal Connection No Internal Connection Power-Down (Active LOW) Maximum Gain Select 1 (MSB) Maximum Gain Select 2 Maximum Gain Select 3 (LSB) VCA Analog Control Negative VCA Output Channel A Positive VCA Output Channel A Ground Channel A +5V Supply Channel A Coupling Capacitor Channel A Coupling Capacitor Channel A Do Not Connect No Internal Connection
VCA2618
SBOS254B
NOUTB
VDDB
CP2B
CP1B
GNDB
NC
DNC
16
9
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