VCA2614

VCA2614 BURR-BROWN | Alldatasheet

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G GAIN RANGE: 40dB G 40MHz BANDWIDTH G LOW CROSSTALK: 70dB at Max Gain, 5MHz G HIGH-SPEED VARIABLE GAIN ADJUST G POWER SHUTDOWN MODE G HIGH IMPEDANCE INPUT BUFFER APPLICA TIONS G ULTRASOUND SYSTEMS G GAMMA CAMERAS G WIRELESS RECEIVERS G TEST EQUIPMENT VCA2614 Dual, VARIABLE GAIN AMPLIFIER with Input Buffer

DESCRIPTION

The VCA2614 is a highly integrated, dual receive channel, Variable Gain Amplifier (VGA) with analog gain control. The VCA2614’s VGA section consists of two parts: the Volt- age 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 program- mable 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 Converters (ADCs). A sepa- rate power-down pin reduces power consumption. The VCA2614 also features low crosstalk and outstanding distortion performance. The combination of low noise and gain range programmability makes the VCA2614 a versatile build- ing block in a number of applications where noise perfor- mance is critical. The VCA2614 is available in a TQFP-32 package. Programmable Gain Amplifier Voltage Control Attenuator Buffer Analog Control VCA2614 (1 of 2 Channels) Maximum Gain Select INA VCA CNTL C P2A C P1A POUTA N OUTA MGS 1 MGS 2 MGS 3 Maximum Gain Select Programmable Gain Amplifier Voltage Control Attenuator BufferINB C P2B C P1B POUTB N OUTB SBOS185D – JANUARY 2001 – REVISED MARCH 2003 www.ti.com Copyright © 2001-2003, Texas Instruments Incorporated 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. 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. VCA2614

SBOS185Dwww.ti.com

ELECTRICAL CHARACTERISTICS

At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground differential output (2Vp-p), MGS = 011, and fIN = 5MHz, unless otherwise noted. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Texas Instru- ments 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 degrada- tion 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. ABSOLUTE MAXIMUM RATINGS (1) 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. SPECIFIED PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT PRODUCT PACKAGE-LEAD DESIGNATOR (1) RANGE MARKING NUMBER MEDIA, QUANTITY VCA2614Y TQFP-32 Surface-Mount PBS –40°C to +85°C VCA2614Y VCA2614Y/250 Tape and Reel, 250 "" """ VCA2614Y/2K Tape and Reel, 2000 NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com. PACKAGE/ORDERING INFORMATION VCA2614Y PARAMETER CONDITIONS MIN TYP MAX UNITS BUFFER Input Resistance 600 k Ω Input Capacitance 5p F Input Bias Current 1n A Maximum Input Voltage 1 Vp-p Input Voltage Noise MGS = 111, PGA Gain = 44.2dB, R S = 50Ω 4.8 nV/ √Hz Input Current Noise Independent of Gain 350 fA/ √Hz Noise Figure R F = 550Ω , PGA Gain = 44.2dB, RS = 75Ω 13 dB Bandwidth 100 MHz PROGRAMMABLE VARIABLE GAIN AMPLIFIER Peak Input Voltage 1 Vp-p –3dB Bandwidth 40 MHz Slew Rate 300 V/ µs Output Signal Range R L ≥ 500Ω Each Side to Ground 2.5 ±1V Output Impedance f = 5MHz 1 Ω Output Short-Circuit Current ±40 mA 3rd-Harmonic Distortion f = 5MHz, V OUT = 2Vp-p, VCACNTL = 3.0V –45 –60 dBc 2nd-Harmonic Distortion f = 5MHz, V OUT = 2Vp-p, VCACNTL = 3.0V –45 –50 dBc Overload Performance (2nd-Harmonic Input Signal = 1Vp-p, MGS = 111, VCACNTL = 2V –40 to –45 dB Distortion) Time Delay 5n s IMD, 2-Tone V OUT = 2Vp-p, f = 9.95MHz –59 dBc Crosstalk 70 dB Group Delay Variation 1MHz < f < 10MHz, Full Gain Range 13 ns ACCURACY Gain Slope 10.5 dB/V Gain Error ±2(1) dB Output Offset Voltage ±50 mV GAIN CONTROL INTERFACE Input Voltage (VCACNTL ) Range 0.2 to 3.0 V Input Resistance 1M Ω Response Time 40dB Gain Change, MGS = 111 0.2 µs POWER SUPPLY Specified Operating Range 4.75 5.0 5.25 V Power Dissipation Operating, Each Channel 120 150 mW Power-Down 9.2 mW NOTE: (1) Referenced to best fit dB-linear curve.

SBOS185D www.ti.com VCA2614 1+ I N A Input Channel A

2 NC No Internal Connection

3V DDR Internal Reference Supply 4V BIAS Bias Voltage 5V CM Common-Mode Voltage

6 GND R Internal Reference Ground

7 NC No Internal Connection

9 NC No Internal Connection

10 DNC Do Not Connect

P2B Coupling Capacitor Channel B

12 C P1B Coupling Capacitor Channel B

13 V DDB +5V Supply Channel B

14 GND B Ground Channel B

15 P OUTB Positive Output Channel B

16 N OUTB Negative Output Channel B

PIN DESIGNATOR DESCRIPTION PIN DESIGNATOR DESCRIPTION PIN DESCRIPTIONS +INA NC VDDR VBIAS VCM GND R NC +INB VCA CNTL MGS 3 MGS 2 MGS 1 PD NC NC DNC VCA2614 NC DNC C P2B C P1B VDDB GND B POUTB N OUTB NC DNC C P2A C P1A VDDA GND A POUTA N OUTA

17 DNC Do Not Connect

18 NC No Internal Connection

19 NC No Internal Connection

20 PD Power Down (Active LOW)

21 MGS 1 Maximum Gain Select 1 (MSB)

22 MGS 2 Maximum Gain Select 2

23 MGS 3 Maximum Gain Select 3 (LSB)

24 VCA CNTL VCA Analog Control

25 N OUTA Negative VCA Output Channel A

26 P OUTA Positive VCA Output Channel A

27 GND A Ground Channel A

28 V DDA +5V Supply Channel A

29 C P1A Coupling Capacitor Channel A

30 C P2A Coupling Capacitor Channel A

31 DNC Do Not Connect

32 NC No Internal Connection

SBOS185Dwww.ti.com TYPICAL CHARACTERISTICS At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2Vp-p) MGS = 011, and fIN = 5MHz, unless otherwise noted. GAIN ERROR vs TEMPERATURE VCA CNTL (V) Gain Error (dB) 2.0 1.5 1.0 0.5 –0.5 –1.0 –1.5 –2.0 +25°C –40°C +85°C GAIN ERROR vs VCA CNTL VCA CNTL (V) Gain Error (dB) 2.0 1.5 1.0 0.5 –0.5 –1.0 –1.5 –2.0 10MHz 5MHz 1MHz GAIN ERROR vs VCA CNTL VCA CNTL (V) Gain Error (dB) 2.0 1.5 1.0 0.5 –0.5 –1.0 –1.5 –2.0 MGS = 001 MGS = 000 MGS = 111 GAIN vs VCACNTL VCA CNTL (V) Gain (dB) MGS = 111 MGS = 110 MGS = 101 MGS = 001 MGS = 010 MGS = 011 MGS = 100 GAIN MATCH: CHA to CHB, VCACNTL = 0.2V Delta Gain (dB) –0.88 Units 120 100 –0.81 –0.74 –0.68 –0.61 –0.55 –0.48 –0.42 –0.35 –0.29 –0.22 –0.16 –0.09 –0.03 0.04 0.10 0.17 0.23 0.30 0.36 0.43 0.49 GAIN MATCH: CHA to CHB, VCACNTL = 3.0V Delta Gain (dB) –0.07 Units –0.06 –0.05 –0.04 –0.02 –0.01 0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.08 0.10 0.11 0.12 0.13 0.14 0.16 0.17 0.18

SBOS185D www.ti.com VCA2614 TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2Vp-p) MGS = 011, and fIN = 5MHz, unless otherwise noted. GAIN vs FREQUENCY Frequency (Hz) 100k 1M 10M 100M Gain (dB) –10 –15 VCA CNTL = 3.0V VCA CNTL = 1.6V VCA CNTL = 0.2V GAIN vs FREQUENCY (VCA CNTL = 3.0V) Frequency (Hz) 100k 1M 10M 100M Gain (dB) MGS = 111 MGS = 011 MGS = 001 OUTPUT REFERRED NOISE vs VCA CNTL VCA CNTL (V) Noise (nV/√Hz) 450 400 350 300 250 200 150 100 R S= 50Ω MGS = 111 MGS = 011 INPUT REFERRED NOISE vs VCA CNTL VCA CNTL (V) Noise (nV/√Hz) 220 200 180 160 140 120 100 R S= 50Ω MGS = 111 MGS = 011 INPUT REFERRED NOISE vs R S R S (Ω ) 1 10 100 1k Noise (nV√Hz) 100 NOISE FIGURE vs RS R S (Ω ) 10 100 1k Noise Figure (dB)

SBOS185Dwww.ti.com TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2Vp-p) MGS = 011, and fIN = 5MHz, unless otherwise noted. HARMONIC DISTORTION vs FREQUENCY (Differential, 2Vp-p, MGS = 001) Frequency (Hz) 100k 1M 10M Harmonic Distortion (dBc) –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 VCA CNTL = 0.2V, H2 VCA CNTL = 0.2V, H3 VCA CNTL = 3.0V, H2 VCA CNTL = 3.0V, H3 HARMONIC DISTORTION vs FREQUENCY (Single-Ended, 1Vp-p, MGS = 001) Frequency (Hz) 100k 1M 10M Harmonic Distortion (dBc) –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 VCA CNTL = 0.2V, H2 VCA CNTL = 0.2V, H3 VCA CNTL = 3.0V, H2 VCA CNTL = 3.0V, H3 HARMONIC DISTORTION vs FREQUENCY (Differential, 2Vp-p, MGS = 111) Frequency (MHz) 100k 1M 10M Harmonic Distortion (dBc) –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –80 VCA CNTL = 0.2V, H2 VCA CNTL = 0.2V, H3 VCA CNTL = 3.0V, H2 VCA CNTL = 3.0V, H3 HARMONIC DISTORTION vs FREQUENCY (Differential, 2Vp-p, MGS = 011) Frequency (Hz) 100k 1M 10M Harmonic Distortion (dBc) –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 VCA CNTL = 0.2V, H2 VCA CNTL = 0.2V, H3 VCA CNTL = 3.0V, H2 VCA CNTL = 3.0V, H3 HARMONIC DISTORTION vs FREQUENCY (Single-Ended, 1Vp-p, MGS = 011) Frequency (Hz) 100k 1M 10M Harmonic Distortion (dBc) –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 VCA CNTL = 0.2V, H2 VCA CNTL = 0.2V, H3 VCA CNTL = 3.0V, H2 VCA CNTL = 3.0V, H3 NOISE FIGURE vs VCA CNTL VCA CNTL (V) Noise Figure (dB)

SBOS185D www.ti.com VCA2614 TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2Vp-p) MGS = 011, and fIN = 5MHz, unless otherwise noted. HARMONIC DISTORTION vs VCA CNTL (Differential, 2Vp-p, 5MHz) VCA CNTL (V) Harmonic Distortion (dBc) –10 –15 –20 –25 –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –80 MGS = 001, H2 MGS = 011, H2 MGS = 111, H2 MGS = 001, H3 MGS = 011, H3 MGS = 111, H3 HARMONIC DISTORTION vs VCA CNTL (Single-Ended, 1Vp-p, 5MHz) VCA CNTL (V) Harmonic Distortion (dBc) –10 –15 –20 –25 –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 MGS = 001, H2 MGS = 011, H2 MGS = 111, H2 MGS = 001, H3 MGS = 011, H3 MGS = 111, H3 CROSSTALK vs FREQUENCY (Differential, 2Vp-p, MGS = 011) Frequency (MHz) 1 10 100 Cross Talk (dB) –10 –20 –30 –40 –50 –60 –70 –80 –90 VCA CNTRL = 0V VCA CNTRL = 1.5V VCA CNTRL = 3.0V HARMONIC DISTORTION vs FREQUENCY (Single-Ended, 1Vp-p, MGS = 111) Frequency (Hz) 100k 1M 10M Harmonic Distortion (dBc) –30 –35 –40 –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 VCA CNTL = 0.2V, H2 VCA CNTL = 0.2V, H3 VCA CNTL = 3.0V, H2 VCA CNTL = 3.0V, H3 INTERMODULATION DISTORTION (Single-Ended, 1Vp-p, f = 10MHz, VCACNTRL = 3.0V) Frequency (MHz) 9.89.6 10 10.2 10.4 Amplitude (dB) –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 INTERMODULATION DISTORTION (Differential, 2Vp-p, f = 10MHz, VCACNTL = 3.0V) Frequency (MHz) 9.89.6 10 10.2 10.4 Amplitude (dB) –10 –20 –30 –40 –50 –60 –70 –80 –90

SBOS185Dwww.ti.com OVERLOAD DISTORTION vs FREQUENCY Frequency (Hz) 1 100 2nd-Harmonic Distortion (dBc) –10 –20 –30 –40 –50 –60 0.5V 0.1 0.25V I CC vs TEMPERATURE Temperature (°C) –40 –10 5–25 35 50 20 65 80 95 ICC (mA) GROUP DELAY vs FREQUENCY Frequency (MHz) 1 10 100 Group Delay (ns) VCA CNTL = 3.0V VCA CNTL = 0.2V TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, differential output (2Vp-p) MGS = 011, and fIN = 5MHz, unless otherwise noted.

FIGURE 4. Piecewise Approximation to Logarithmic Control Characteristics.

Figure 5 shows a simplified circuit diagram of the PGA block. where CEXTERNAL is the external capacitor value in picofarads. capacitor, as this can increase the power-on delay time. and attenuation factors are detailed in Table I.

000 Not Valid Not Valid

FIGURE 5. Simplified Block Diagram of the PGA Section with the VCA2614. The VCA2614 is an analog amplifier capable of high gain. the layout diagram of Figure 6.

FIGURE 6. VCA2614 Layout.

SBOS185D www.ti.com VCA2614 PBS (S-PQFP-G32) PLASTIC QUAD FLATPACK Gage Plane 0,13 NOM 0,25 0,40 0,70 Seating Plane 0,10 MIN 4087735/A 11/95 0,17 0,23 5,05 4,95 SQ 3,50 TYP 6,90 7,10 SQ 1,05 0,95 1,20 MAX 0,08 0,50 M0,08 0°–7° NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. PACKAGE DRAWING

Orderable Device Status(1) Package Type Package Drawing Pins Package Qty Eco Plan(2) Lead/Ball FinishMSL Peak Temp (3) VCA2614Y/250 ACTIVE TQFP PBS 32 250 None CU SNPB Level-3-220C-168 HR VCA2614Y/2K ACTIVE TQFP PBS 32 2000 None CU SNPB Level-3-220C-168 HR (1)The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2)Eco Plan - May not be currently available - please checkhttp://www.ti.com/productcontentfor the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). Pb-Free (RoHS):TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br):TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. PACKAGE OPTION ADDENDUM www.ti.com 9-Dec-2004 Addendum-Page 1

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