User's GuideSLWU058 – August 2008
Voltage-Controlled Amplifier Evaluation Kit
The TSW7001 is an evaluation module that demonstrates an ultra-wideband, high-performance,voltage-controllable gain stage with 40 dB of voltage-controlled gain (nominal gain of 100). Thedemonstration kit includes an optional path for an onboard OPA656 transimpedance input stage, a 16-bitprecision voltage DAC8831 to implement the gain control voltage, and the VCA824 ultra-wideband,voltage-controlled amplifier. Also onboard are linear regulators to provide the voltages necessary for theamplifier circuits and a precision 1.2-V reference for the control voltage digital-to-analog converter (DAC).Control of the board is achieved through a USB interface and GUI software. This allows a personalcomputer to control the gain of the VCA824 without the need for extra signal generators. The controllevels can be static voltage levels or dynamically changing waveforms, both selectable from the GUI.
Figure 1. TSW7001EVM
Contents1 TSW7001EVM Configuration Options .................................................................................... 22 Block Diagrams .............................................................................................................. 33 Key Texas Instruments Components ..................................................................................... 34 Software Installation ......................................................................................................... 45 Software ....................................................................................................................... 46 TSW7001 EVM Introduction .............................................................................................. 117 Demonstration Kit Test Configuration ................................................................................... 128 Initial Power Up and Test ................................................................................................. 149 Optional Configurations.................................................................................................... 1410 Bill of Materials and Schematics ......................................................................................... 1611 References .................................................................................................................. 21
List of Figures
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 1Submit Documentation Feedback
1 TSW7001EVM Configuration Options
1.1 Board Configuration
TSW7001EVM Configuration Options
www.ti.com
1 TSW7001EVM ............................................................................................................... 12 Optional Onboard OPA656 Transimpedance Input Stage. ............................................................. 23 TSW7001EVM Block Diagram ............................................................................................. 34 VCA824 Schematic .......................................................................................................... 35 TSW7001 Control Voltage GUI ............................................................................................ 96 TSW7001 Output for Step Function ....................................................................................... 97 TSW7001 Ramp Output ................................................................................................... 108 TSW7001 Arbitrary Gain Profile Panel .................................................................................. 109 Output of TSW7001 With Arbitrary Gain Profile ........................................................................ 1110 TSW7001 Test Setup ...................................................................................................... 1211 IMD3 Plot for TSW7001 at 10 MHz ...................................................................................... 1312 IMD3 for TSW7001 in 40-dB Gain Mode ................................................................................ 1313 Harmonic Distortion for TSW7001 in 40-dB Gain Mode .............................................................. 1414 Optional Path for OPA656 Input Buffer/Transimpedance Amplifier. ................................................. 15
List of Tables
1 Input and Output Connections ............................................................................................ 112 Bill of Materials ............................................................................................................. 16
The TSW7001 evaluation module (EVM) can be configured to have an optional transimpedance inputstage using an OPA656 operational amplifier. In the default configuration, the OPA656 is bypassed andthe input is directly connected to the input of the VCA824 amplifier. The voltage supplies for the amplifiersalso can be optionally configured for external offboard supplies. This section outlines the variouscomponents and configurations.
The EVM is by default configured to bypass the optional input transimpedance gain stage. This stage canbe enabled by connecting the SJP5 and SJP6 solder jumpers in the 2-3 position as shown in Figure 2 . Inthis configuration, the transimpedance gain of the OPA656 circuit has to be optimized for the particularinput load/sensor input capacitance [see Section 11 , Ref 1].
Figure 2. Optional Onboard OPA656 Transimpedance Input Stage.
Voltage-Controlled Amplifier Evaluation Kit2 SLWU058 – August 2008Submit Documentation Feedback
1.2 Using External Operational Amplifier Supplies
2 Block Diagrams
2.1 System Block Diagram
3 Key Texas Instruments Components
3.1 VCA824
www.ti.com
Block Diagrams
By default both amplifiers are set up to operate with a ±5 V. This is adequate in most cases for evaluationpurposes; however, both the OPA656 and VCA824 can be operated at a maximum of ±6-V supply. Ferritebeads allow the use of a different ±Vamp supply for both amplifiers, if desired.
Figure 3 shows the functional blocks on the TSW7001 board. The Texas Instruments integrated circuits(IC) are listed on board for reference.
Figure 3. TSW7001EVM Block Diagram
The VCA824 is a dc-coupled, ultra-wideband, voltage-controlled amplifier with a linear in V/V gain controlvoltage input to adjust the gain down 40 dB from the nominal gain set by the gain resistor R291 (Rg) andthe feedback resistor R302 (Rf). The gain element is isolated from both inputs, permitting gain controlshaping techniques to be implemented easily. Both the inverting and noninverting inputs of the VCA824are high impedance, allowing a simple interface to the prior stage.This EVM has a nominal gain of 100V/V (40 dB). Typical applications that are well-suited to the VCA824 include differential line receivers,differential equalizers, pulse amplitude compensation, and variable attenuators. More information for theVCA824 is available in the data sheet (SBOS394 ). For a lower speed VCA, consider the VCA822. For alinear in dB gain adjust range, consider the VCA820 and VCA821.
Figure 4. VCA824 Schematic
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 3Submit Documentation Feedback
3.2 OPA656
3.3 TPS76xxx, TPS5430, UCC284-5
4 Software Installation
4.1 TSW7001 USB Drivers
5 Software
5.1 Software Introduction
Software Installation
www.ti.com
The OPA656 is a wideband, unity-gain-stable, FET-input, voltage-feedback operational amplifier, allowingexceptional performance in high-speed, low-noise applications. Extremely low dc errors give goodprecision in optical applications. Typical applications for the OPA656 include wideband photodiodeamplifiers, sample and hold buffers, CCD output buffers, ADC input buffers, wideband precision amplifiers,and test and measurement front ends. See the data sheet (SBOS196 ) for more detailed performance andapplication data. If wider bandwidth is required with the FET input, consider using the OPA657; if lowernoise is required, consider the OPA847.
The TPS76xxx provide 3.3-V and 5-V linear regulation for the DAC5682z, CDCM7005, and V+ amplifiersupplies. The TPS5430 generate -5.5 V from 6-V input followed by the UCC284-5, which provides linear–5-V regulation for the V– amplifier supply.
The CDROM contains an installer that installs the necessary USB drivers and the GUI software togenerate the control voltage.
Execute the TSW7001_setup.exe file. This creates and copies all drivers and GUI files to the directoryC:\Program Files\Texas Instruments\TSW7001. Details of this installer and the GUI functions are coveredin Section 5 .
Once the software is installed, power up the TSW7001 and attach the personal computer (PC) to theTSW7001 via the USB connector. The PC detects a TSW7001 device. If the PC cannot find the driversautomatically, point the Device Wizard to C:\Program Files\TexasInstruments\TSW7001\TSW7001_Drivers for the correct USB drivers.
The TSW7001 GUI software allows you to control the voltage of the DAC8831 precision voltage DAC. Theminimum to maximum voltage output ranges from -1 V to +1 V, which is the range of the control voltagefor the VCA824.
Voltage-Controlled Amplifier Evaluation Kit4 SLWU058 – August 2008Submit Documentation Feedback
5.2 Software Installation
www.ti.com
Software
The GUI can be installed via the TSW7001_setup.exe file. Executing this file starts the program and driverinstallation.
Click Next to proceed to the end-user license agreement.
Read and accept the end-user license agreement, and click Next.
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 5Submit Documentation Feedback
Software
www.ti.com
Set up the User Name and Organization. Click Next.
Do a Complete Install. Click Next, then click Install.
6Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
www.ti.com
Software
Wait a couple of minutes for the installer to complete. Then Click Finish.
The new executable can be found under the Programs\Texas Instruments\TSW7001 folder from the Startmenu or in theC: drive at C:\Program Files\Texas Instruments\TSW7001\TSW7001_DAC8831_USB_GUI.exe
Plug in the USB cable to the PC and the TSW7001. This causes the hardware wizard to detect theTSW7001 and start installing the drivers. Click Continue Anyway when asked about WindowsCompatibility.
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 7Submit Documentation Feedback
5.3 TSW7001 GUI Software
Software
www.ti.com
The hardware is found and is ready to use.
Once the TSW7001 GUI is started, and the EVM has gone through USB enumeration, the CONNECTbutton must be pressed to establish an open communications channel between the PC and the TSW7001.The GUI responds with a message indicating that communication has been established.
At this point, static voltage levels can be programmed to set the VCA824 to a fixed gain from the frontpanel by entering decimal values in the Write text box and clicking the WRITE button. The control DACvalues can range from 0-65535 (16 bit DAC). The 40-dB gain is controlled by this voltage.
The front panel also has two special cyclic functions: a step function and a ramp function. The stepfunction has a text box to enter the low-step DAC value and the time length and the high-step DAC valueand the time length. Each unit of time is accounted as one time tick which is one USB update cycle. Thisvaries from computer to computer and can be 10-30 ms long. The ramp function is similar and requiresentering the start and stop values of the ramp and the rise and fall time length in time-tick increments.
Logging of the data writes is optional and can be controlled by checking the Log Output box. Themessage window can be cleared with the Clear button.
8Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
www.ti.com
Software
Figure 5. TSW7001 Control Voltage GUI
Figure 6. TSW7001 Output for Step Function
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 9Submit Documentation Feedback
Software
www.ti.com
Figure 7. TSW7001 Ramp Output
Figure 8. TSW7001 Arbitrary Gain Profile Panel
10 Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
6 TSW7001 EVM Introduction
6.1 Jumper Settings
6.2 Input/Output Connectors
6.3 USB Interface
www.ti.com
TSW7001 EVM Introduction
Figure 9. Output of TSW7001 With Arbitrary Gain Profile
The TSW7001 was designed to provide an easy way to test the VCA824 in a high-performance,voltage-controlled gain application. The EVM includes a16-bit DAC8831 voltage-controlled DAC toprecisely control the voltage-controlled gain of the VCA824. An optional high-impedance input stage,consisting of an OPA656 circuit, can be enabled to implement a transimpedance function for connection toa photodiode application. The output of the VCA is designed to drive out to 50- Ωtest equipment.
Two solder jumpers can be used to bypass the OPA656 (default) or enable the OPA656 in the signal path.SJP5 and SJP6 must be in the 1-2 position by default to bypass, or in 2-3 position to enable the OPA656.
Optional external power supplies can be used for the OPA656 and VCA824. This requires that someferrite beads be removed to isolate the V+ and V– supplies.
Table 1 lists the input and output connectors.
Table 1. Input and Output Connections
REFERENCE LABEL CONNECTOR DESCRIPTIONDESIGNATOR TYPE
J26 IN SMA Input ac signal / Connection for external photodiodeJ27 OUT SMA Output from VCA824 – 50- Ωsource impedanceJ13 USB USB CONN USB inputJ12 CONN JACK PWR Power Jack Power input for 6-V wall supplyJ24 6.0V IN Banana Jack +6-V input banana jackJ25 GND Banana Jack GND
The TSW7001 contains a 4-pin, USB port connector to interface to a USB 1.1 or later compliant USB port.Programming the DAC8831 control voltage is accomplished through this connector.
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 11Submit Documentation Feedback
6.4 Power Management
7 Demonstration Kit Test Configuration
7.1 Test Setup Block diagram
7.2 Test Equipment
7.3 Typical Performance Measurements
Demonstration Kit Test Configuration
www.ti.com
The TSW7001 requires an input of 6 Vdc either from the banana jack connectors or the supplied 6-V wallsupply. A current rating of at least 2 A is recommended for the 6-V supply. The rest of the supplies: 3.3,±5 V are all generated on the board with linear regulators.
The test setup for the TSW7001 is shown in Figure 10 . This setup shows an input signal from a signalgenerator applied at the input of the TSW7001. The output from the VCA824 is fed into an oscilloscope,spectrum analyzer, or some other 50- Ωterminated test equipment.
Figure 10. TSW7001 Test Setup
The following test equipment is required for testing the TSW7001. Some other equipment can be used;however, results can vary due to limitations of the instruments.•Power supply 6 Vdc, 2 A.•Spectrum Analyzer: Rhode & Schwarz FSU, FSQ, or equivalent•Oscilloscope: Tektronik, LeCroy or other•Pattern generator: Agilent ESG or other signal source•Digital voltmeter to verify signal levels
The gain of the VCA824 is controlled by the voltage output of the DAC8831. The DAC8831 uses a 1.2-Vreference to generate a 2-Vpp signal, which is buffered and level-shifted by an OPA727 to produce a ±1-Vsignal to drive the VCA824 gain control pin. The -1 V corresponds to the minimum gain of 0 dB (ormaximum loss of –40 dB from nominal gain). The +1 V corresponds to maximum gain of +40 dB (orminimum loss of 0 dB from nominal gain).
12 Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
-70
-68
-66
-64
-62
-60
-58
-56
-54
-52
-50
1 10 100
f-Frequency-MHz
Gain-dB
www.ti.com
Demonstration Kit Test Configuration
The input of the TSW7001 is by default terminated with a 50- Ωto ground to enable a connection to a 50- Ωsignal source.
Typical IMD3 and harmonic distortion data was obtained for the default case of 40-dB gain (Rf=402,Rg=18) driving 100 Ωat the output of the TSW7001 (50- Ωsource into 50- Ωspectrum analyzer).
Figure 11. IMD3 Plot for TSW7001 at 10 MHz
Figure 12. IMD3 for TSW7001 in 40-dB Gain Mode
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 13Submit Documentation Feedback
-65
-60
-55
-50
-45
-40
-35
-30
1 10 100
HD2
HD3
f-Frequency-MHz
Gain-dB
8 Initial Power Up and Test
8.1 Initial Test
8.2 Functional Test
9 Optional Configurations
9.1 Optional OPA656 Input Buffer
Initial Power Up and Test
www.ti.com
Figure 13. Harmonic Distortion for TSW7001 in 40-dB Gain Mode
Plug in the 6-V power supply. This lights up the power LED D18.
Plug in the USB cable, and connect it to the PC. Allow a few seconds for the USB to register andenumerate. Once the computer has detected the TSW7001 EVM, then start the TSW7001 Control PanelGUI – refer to Section 5 . Ensure that the TSW7001 Control Panel GUI connects to the TSW7001 EVM.
Do not connect any input signals into J26 at this time. Change the static voltage register value in the GUIto 0, and click WRITE. Monitor the voltage level at C74. This level reads –1 V. Change the static registervalue to 65535, click WRITE. This generates a +1 V on C74. This is the range of the control voltage usedto control the gain of the VCA824. Set the register value back to 0 (–1 V for minimum gain).
Connect a 50- Ωsignal source to the input of the TSW7001EVM at J26. Set the signal frequency to 10MHz, and the amplitude to -20 dBm.
Set the static voltage register value to 32767 (midscale) to set the control voltage to about 0 Vdc. Verify atthe output SMA J27 that the 10-MHz tone changes to 20 dB.
Verify that the cyclic step and ramp functions on the first tab of the GUI by entering values for the step andramp. Monitor on an oscilloscope that the sine-wave amplitude is changing as expected.
Verify that the arbitrary cyclic function on the second tab of the GUI by entering some arbitrary gain steps.
An OPA656 amplifier is included on the EVM to be used as an input buffer stage. The OPA656 combinesa wideband, unity-gain-stable, voltage-feedback operational amplifier with a FET-input stage to offer anultra-high, dynamic-range amplifier for buffering and transimpedance applications. Extremely low dc errorsgive good precision in optical applications.
14 Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
9.2 Different Amplifier Voltage Supplies
www.ti.com
Optional Configurations
The high unity-gain-stable bandwidth and JFET input allows exceptional performance in high-speed,low-noise integrators.
The high-input impedance and low-bias current provided by the FET input is supported by the ultra-low,7-nV/Hz, input voltage noise to achieve a low integrated noise in wideband photodiode transimpedanceapplications.
Broad transimpedance bandwidths are achievable given the OPA656’s high 230-MHz-gain bandwidthproduct. As shown in Figure 14 , a –3-dB bandwidth of 1 MHz is provided even for a high 1-M Ωtransimpedance gain from a 47-pF source capacitance.
This amplifier is by default bypassed; however, it can be placed back in the signal path by changing theposition of SJP5 and SJP6 to 2-3. The input and feedback circuits of the OPA656 have to be modifiedappropriately for the intended application. Contact factory applications support for help with specificrequirements.
Figure 14. Optional Path for OPA656 Input Buffer/Transimpedance Amplifier.
When changing the amplifier power supplies from the onboard ±5 V to some external supply, it isimportant to ensure that the voltages to the OPA656 stay within ±4 V to ±6 V. Remove the ferrite beadsthat connect the OPA656 to the ±Vamp supplies (FB7, FB13). External supplies then can be connected tothe +VAMP and –VAMP test points (TP3, TP9). The onboard 5 V is still used by other onboard circuits.
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 15Submit Documentation Feedback
10 Bill of Materials and Schematics
Bill of Materials and Schematics
www.ti.com
This section contains the bill of materials and schematics for the TSW7001EVM.
Table 2. Bill of MaterialsQTY Part Reference Value PCB Footprint Mfr_Name Mfr_Part_No. Note
1 C37 2.2 µF 1206 Murata GRM31MR71C225KA3
5L
2 C38 C39 2.2 µF TANT_A ROHM TCA1C225M8R
3 C56 C79 C124 0.01 µF 0603 Panasonic ECJ-1VB1C103K
10 C57 C61 C65 C66 0.1 µF 0402 Panasonic ECJ-0EB1C104KC69 C100 C131 C149C168 C352
1 C58 4.7 µF tant_a AVX TAJA475K020R
2 C59 C60 47 pF 0603 Panasonic ECJ-1VC1H470J
1 C62 100 µF tant_c AVX TPSC1070M010R0075
1 C63 1 µF tant_a AVX T494A105M016AT
1 C64 4.7 µF tant_b AVX T494B475M010AT
6 C67 C68 C81 C123 47 µF tant_b Kemet T494B476M010ASC153 C169
0 C71 0.1 µF 0402 Panasonic ECJ-0EB1C104K_DNI DNI
1 C72 20 pF 0402 Murata GRM1555C1H200JZ01
D
1 C73 1500 pF 0402 Panasonic ECJ-0EB1E152K
1 C74 3900 pF 0603 Panasonic ECJ-1VB1H392K
3 C78 C91 C125 1 µF 0603 Panasonic ECJ-1V41E105M
3 C80 C126 C127 10 µF tant_a Kermet T494A106M016AS
3 C90 C92 C99 0.01 µF 0402 Panasonic ECJ-0EB1E103K
6 C148 C154 C155 10 uF 1206 Panasonic ECJ-3YB1C106K LOW ESRC163 C164 C170
1 C171 0.015 µF 0402 Panasonic ECJ0EB1C153K
1 C350 0.6 pF 0603 AVX 06035J0R6PBTTR
1 C351 X2Y 0.1 µF FILTER_3_SM_X2Y_0603 Yageo CX0603MRX7R6BB104
1 D18 LED green LED_0805 Panasonic LNJ306G5UUX
1 D20 20V, 1A MCC_SOD123 On Semi MBR120LSFT1
6 FB4 FB7 FB13 FB16 68 Ωat 100 MHz 1206 Panasonic EXC-ML32A680UFB23 FB26
1 J12 CONN JACK PWR CON_RAPC722_JACK_THVT_3 Switchcraft RAPC722
1 J13 USB_B_S_F_B_TH CON_THRT_USB_B_F SAMTEC USB-B-S-F-B-TH
1 J24 BANANA_JACK_RED CON_THVT_BANANA_JACK_250DIA SPC Technology 845-R
1 J25 BANANA_JACK_BLK CON_THVT_BANANA_JACK_250DIA SPC Technology 845-B
2 J26 J27 SMA_END_JACK_RND SMA_SMEL_373x312 Johnson Components 142-0701-801
1 L9 100 µH IND_SM_MSS1048 COILCRAFT MSS1048-104MLB
5 R72 R108 R109 R113 10K 0402 Panasonic ERJ-2RKF1002XR114
1 R73 2.87K, 62 mW 0402 Panasonic ERJ-2RKF2872X
2 R74 R83 100K 0603 Panasonic ERJ-3EKF1003V
6 R78 R79 R81 R84 22.1 0402 Panasonic ERJ-2RKF22R1XR89 R97
3 R80 R82 R90 100 0402 Panasonic ERJ-2RKF1000X
1 R85 250K 1206 Ohmite HVF1206T2503FE
1 R117 300 0603 Panasonic ERJ-3EKF3000V
4 R118–R121 0 0603 Panasonic ERJ-3GEY0R00V
1 R122 2K 0603 Vishay CRCW06032K00FKEA
1 R290 50K 1206 Ohmite HVF1206T5002FE
1 R291 18 0402 Panasonic ERJ-2RKF18R0X
3 R295 R296 R299 50 0402 Vishay FC0402E50R0BST1
2 R298 R300 20 0402 Panasonic ERJ-2RKF20R0X
1 R301 50 0603 Vishay FC0603E50R0BTBST1
1 R302 402 0402 Panasonic ERJ-2RKF4020X
2 SJP5 SJP6 Jumper_1x3_SMT SMD_BRIDGE_1x3_0603 DNI DNI (SHUNT 1-2)
12 TP2–TP7, TP9, Testloop_Black TP_THVT_060_RND Components TP-105-01-00TP11–TP15 Corporation
16 Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
www.ti.com
Bill of Materials and Schematics
Table 2. Bill of Materials (continued)QTY Part Reference Value PCB Footprint Mfr_Name Mfr_Part_No. Note
1 U5 FT245RL SSOP_28_413x220_26 FTDI Chip FT245RL
1 U7 TPS5430 PSOP_8P_THERMAL Texas Instruments TPS5430DDA
1 U8 UCC284-5 SOIC_8 Texas Instruments UCC285-5
1 U10 SN74AHC541PW TSSOP_20_260x177_26 Texas Instruments SN74AHC541PW
1 U13 TPS76750QPWP HTSSOP_20_260x177_26_pwrpad Texas Instruments TPS76750QPWP
1 U15 TPS76733QPWP HTSSOP_20_260x177_26_pwrpad Texas Instruments TPS76733QPWP
1 U16 DAC8831ID SO_14_344x157_50 Texas Instruments DAC8831ID
1 U17 OPA727AIDGK HTSSOP_8_120x120_26 Texas Instruments OPA727AIDGK
1 U18 VCA824ID SO_14_344x157_50 Texas Instruments VCA824ID
1 U19 OPA656 SO_8_197x157_50 Texas Instruments OPA656U
1 VR1 LM285-1.2 TO_226 Texas Instruments LM285-1.2
4 Screw panhead 4-40 x 3/8 Building Fasteners PMS 440 0038 PH Screw for standoff
2 FOR SJP5 & SPJ6 Shunt-jumper-0603 Panasonic ERJ-3GE0R00X Shunt for jumper
4 Standoff alum hex 4-40 x Keystone 2203 Standoff0.500
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 17Submit Documentation Feedback
10.1 Schematics
VG
VG
+5VA
+5VA
+5VA
1.2V
+V_AMP
-V_AMP
-5V
+V_AMP
-V_AMP
+V_AMP -V_AMP
+V_AMP
SDENBSH2
SCLKSH2
SDIOSH2
C74
3900pF
C74
3900pF
SMA
END
J26
IN
SMA
END
J26
IN
1
5234
U17
OPA727AIDGK
U17
OPA727AIDGK
-IN
2
+IN
3
V+
7
OUT 6
V-
4
R298
20
R298
20 C352
.1uF
C352
.1uF
R291
18
R291
18
VR1
LM285-1.2
VR1
LM285-1.2
3 2
U18
VCA824ID
U18
VCA824ID
+Vcc
1
VG
2
+VIN
3
+RG
4
-RG
5
-VIN
6
-Vcc
7-Vcc 8
+Vcc 14
NC 13
VOUT 10
VREF 9
FB 12
GND 11
X2Y .1uF
C351
X2Y .1uF
C351
1
2
3
R300 20
R300 20
C72
20pF
C72
20pF
R109
10K
R109
10K
C73
1500pF
C73
1500pF
C65
.1uF
C65
.1uF
SJP6
(SHUNT 1-2)
SJP6
(SHUNT 1-2)
1
3
2
SMA
END
J27
OUT
SMA
END
J27
OUT
1
5234
R290
50K
R290
50K
R122
2K
R122
2K
U16
DAC8831ID
U16
DAC8831ID
RFB 1
VOUT 2
AGND 3
AGND 4
VREF-S
5
VREF-F
6
CS
7
SCLK
8
NC 9
SDI
10
LDAC
11
DGND 12
INV 13
VDD
14
+
C38
2.2uF
20%
16V
+
C38
2.2uF
20%
16V
12
R301
50
R301
50
R120
0
R120
0
+
C127
10uF
10V
+
C127
10uF
10V
R85
250K
R85
250K
+
C39
2.2uF
20%
16V
+
C39
2.2uF
20%
16V
1 2
C350
0.6pF
C350
0.6pF
IN-
IN+
OUT
+VS
-VS
U19
OPA656
IN-
IN+
OUT
+VS
-VS
U19
OPA656
2
3
4
6
7
C69
.1uF
C69
.1uF
R296
50
R296
50
C71
.1uF
DNI
C71
.1uF
DNI
R299
50
R299
50
TP15TP15
SJP5
(SHUNT 1-2)
SJP5
(SHUNT 1-2)
1
3
2
R295
50
R295
50
R302 402R302 402
R121
0
R121
0
R119
0
R119
0
Bill of Materials and Schematics
www.ti.com
The TSW7001EVM schematics follow.
18 Voltage-Controlled Amplifier Evaluation Kit SLWU058 – August 2008Submit Documentation Feedback
+3.3V_LOGIC
+3.3V_LOGIC
SDENB SH1
SDIO SH1
SCLK SH1
R113
10K
R113
10K
R78 22.1R78 22.1
R81 22.1R81 22.1
R80 100R80 100
R89 22.1R89 22.1
R82 100R82 100
C131
.1uF
C131
.1uF
R97 22.1R97 22.1
U5
FT245RL
U5
FT245RL
USBDM
16
USBDP
15
VCCIO
4
NC1
8
RESET
19
NC2
24
OSCI
27
OSCO
28
3V3OUT
17
AGND
25
GND
7
GND
18
GND
21
TEST
26 PWREN 12
WR 14
D1 5
D7 6
D5 9
D6 10
TXE 22
D4 2
D3 11
RXF 23
D0 1
RD 13
VCC
20
D2 3
68OHM@100MHz
FB4
68OHM@100MHz
FB4
R114
10K
R114
10K
J13
USB_B_S_F_B_TH
USB_CONN
J13
USB_B_S_F_B_TH
USB_CONN
VCC 1
-DATA 2
+DATA 3
GND 4
GND1
5
GND2
6
R108
10K
R108
10K
C59
47pF
C59
47pF
C56
.01uF
C56
.01uF
R90 100R90 100
R84 22.1R84 22.1
+
C58
4.7uF
20V
+
C58
4.7uF
20V
R79 22.1R79 22.1
U10
SN74AHC541PW
U10
SN74AHC541PW
Y8 11
A1
2
A2
3
A3
4
A4
5
A5
6
A6
7
A7
8
A8
9
GND
10 Y7 12
Y6 13
Y5 14
Y4 15
Y3 16
Y2 17
Y1 18
OE2 19
OE1
1VCC 20
C57
.1uF
C57
.1uF
C61
.1uF
C61
.1uF
C60
47pF
C60
47pF
www.ti.com
Bill of Materials and Schematics
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 19Submit Documentation Feedback
VSENSE
VSENSE
+V_AMP
+5VA
-V_AMP
-5V
+5VA
+6.0VDC
+6.0VDC
-5.5V -5V
MECHANICALHARDWARE
C79
.01uF
C79
.01uF
Z_STANDOFF1
STANDOFF ALUMHEX4-40x.500
Z_STANDOFF1
STANDOFF ALUMHEX4-40x.500
68OHM@100MHz
FB7
68OHM@100MHz
FB7
U8
UCC284-5
U8
UCC284-5
VoutS 1
Vin4
7
Vin3
6SD/CT 8
Vin2
3
GND 4
Vin
2Vout 5
C37
2.2uF
C37
2.2uF
C100
.1uF
10%
16V
C100
.1uF
10%
16V
12
R73
2.87K,62mW
R73
2.87K,62mW
TP13
+5VA
TP13
+5VA
TP4
GND
TP4
GND
D20
20V,1A
MBR120LSFT1
D20
20V,1A
MBR120LSFT1
Z_STANDOFF2
STANDOFF ALUMHEX4-40x.500
Z_STANDOFF2
STANDOFF ALUMHEX4-40x.500
TP5
GND
TP5
GND
TP6
GND
TP6
GND
+
C148
10uF
16V
10%
LOWESR
+
C148
10uF
16V
10%
LOWESR
C92
.01uF
C92
.01uF
Z_SCREW3
SCREWPANHEAD4-40x3/8
Z_SCREW3
SCREWPANHEAD4-40x3/8
Z_STANDOFF3
STANDOFF ALUMHEX4-40x.500
Z_STANDOFF3
STANDOFF ALUMHEX4-40x.500
+
C80
10uF
10V
+
C80
10uF
10V
+
C154
10uF
16V
10%
+
C154
10uF
16V
10%
U13
TPS76750QPWP
U13
TPS76750QPWP
GND/HTSNK2
2
NC3 17
GND
3
NC1
4
EN
5
IN1
6
NC2
8
GND/HTSNK5 11
GND/HTSNK1
1
GND/HTSNK3
9
OUT1 13
GND/HTSNK4
10
IN2
7RESET 16
GND/HTSNK6 12
OUT2 14
FB/NC 15
NC4 18
GND/HTSNK7 19
GND/HTSNK8 20
PWRPAD 21
R74 100KR74 100K
+
C62
100uF
20%
10V
+
C62
100uF
20%
10V
12
+
C64
4.7uF
20%
10V
+
C64
4.7uF
20%
10V
1
2
R72
10K
R72
10K
TP12
-5V
TP12
-5V
Z_STANDOFF4
STANDOFF ALUMHEX4-40x.500
Z_STANDOFF4
STANDOFF ALUMHEX4-40x.500
TP7
GND
TP7
GND
U7
TPS5430
U7
TPS5430
BOOT 1
NC
2
NC2
3Vsense 4
ENA
5
GND 6
Vin
7PH 8
PWP
9
+
C81
47uF
10V
20%
+
C81
47uF
10V
20%
TP2
GND
TP2
GND
+
C153
47uF
10V
20%
+
C153
47uF
10V
20%
68OHM@100MHz
FB13
68OHM@100MHz
FB13
+
C63
1uF
20%
16V
+
C63
1uF
20%
16V
12
Z_SCREW4
SCREWPANHEAD4-40x3/8
Z_SCREW4
SCREWPANHEAD4-40x3/8
68OHM@100MHz
FB23
68OHM@100MHz
FB23
C78
1uF
20%
25V
C78
1uF
20%
25V
C99 .01uF
C99 .01uF
+
C123
47uF
10V
20%
+
C123
47uF
10V
20%
C171
.015uF
10%
16V
C171
.015uF
10%
16V
1
2
+
C155
10uF
16V
10%
LOWESR
+
C155
10uF
16V
10%
LOWESR
TP9
-V_AMP
TP9
-V_AMP
C149
.1uF
10%
16V
C149
.1uF
10%
16V
12
TP11
-5.5V
TP11
-5.5V
C124
.01uF
C124
.01uF
L9
100uH
L9
100uH
+
C126
10uF
10V
+
C126
10uF
10V
Z_SCREW1
SCREWPANHEAD4-40x3/8
Z_SCREW1
SCREWPANHEAD4-40x3/8
Z_SCREW2
SCREWPANHEAD4-40x3/8
Z_SCREW2
SCREWPANHEAD4-40x3/8
C125
1uF
20%
25V
C125
1uF
20%
25V
TP3
+V_AMP
TP3
+V_AMP
Bill of Materials and Schematics
www.ti.com
Voltage-Controlled Amplifier Evaluation Kit20 SLWU058 – August 2008Submit Documentation Feedback
+3.3V_LOGIC
+6.0VDC
+6.0VDC
C168
.1uF
10%
16V
C168
.1uF
10%
16V
1
2
+
C68
47uF
10V
20%
+
C68
47uF
10V
20%
R117
300
R117
300
R83
100K
R83
100K
C91
1uF
20%
25V
C91
1uF
20%
25V
+
C170
10uF
16V
10%
+
C170
10uF
16V
10%
J24
BANANA_JACK_RED
+6.0V_IN
J24
BANANA_JACK_RED
+6.0V_IN
R118
0
R118
0
D18
LEDgreen
+6V
D18
LEDgreen
+6V
TP14
3.3V
TP14
3.3V
+
C67
47uF
10V
20%
+
C67
47uF
10V
20%
+
C169
47uF
10V
20%
+
C169
47uF
10V
20%
68OHM@100MHz
FB16
68OHM@100MHz
FB16
+
C164
10uF
16V
10%
LOWESR
+
C164
10uF
16V
10%
LOWESR
+
C163
10uF
16V
10%
LOWESR
+
C163
10uF
16V
10%
LOWESR
C90
.01uF
C90
.01uF
68OHM@100MHz
FB26
68OHM@100MHz
FB26
J12
CONNJACKPWR
J12
CONNJACKPWR
3
2
1
U15
TPS76733QPWP
U15
TPS76733QPWP
GND/HTSNK2
2
NC3 17
GND
3
NC1
4
EN
5
IN1
6
NC2
8
GND/HTSNK5 11
GND/HTSNK1
1
GND/HTSNK3
9
OUT1 13
GND/HTSNK4
10
IN2
7RESET 16
GND/HTSNK6 12
OUT2 14
FB/NC 15
NC4 18
GND/HTSNK7 19
GND/HTSNK8 20
PWRPAD 21
J25
BANANA_JACK_BLK
GND
J25
BANANA_JACK_BLK
GND
C66
.1uF
10%
16V
C66
.1uF
10%
16V
1
2
11 References
www.ti.com
References
1. Control Frequency Response and Noise in Broadband , Photodetector, Transimpedance Amplifiers,Michael Steffes, Electronic Design News, July 4, 1996.2. VCA824, Ultra-Wideband, >40dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier data sheet(SBOS394 )3. OPA656, Wideband, Unity-Gain Stable, FET-Input Operational Amplifier data sheet (SBOS196 )
SLWU058 – August 2008 Voltage-Controlled Amplifier Evaluation Kit 21Submit Documentation Feedback
EVALUATION BOARD/KIT IMPORTANT NOTICE
Texas Instruments (TI) provides the enclosed product(s) under the following conditions:This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSESONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must haveelectronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be completein terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmentalmeasures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit doesnot fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days fromthe date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYERAND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OFMERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claimsarising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and allappropriate precautions with regard to electrostatic discharge.EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANYINDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.
TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents orservices described herein.
Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. Thisnotice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/orsafety programs, please contact the TI application engineer or visit www.ti.com/esh .No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, orcombination in which such TI products or services might be or are used.FCC Warning
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSESONLY and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radiofrequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which aredesigned to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments maycause interference with radio communications, in which case the user at his own expense will be required to take whatever measures maybe required to correct this interference.
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 6 V to 6.5 V and the output voltage range of 8 V to 10 V.Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questionsconcerning the input range, please contact a TI field representative prior to connecting the input power.Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,please contact a TI field representative.During normal operation, some circuit components may have case temperatures greater than 80 °C. The EVM is designed to operateproperly with certain components above 80 °C as long as the input and output ranges are maintained. These components include but arenot limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identifiedusing the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,please be aware that these devices may be very warm to the touch.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2008, Texas Instruments Incorporated
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,and other changes to its products and services at any time and to discontinue any product or service without notice. Customers shouldobtain the latest relevant information before placing orders and should verify that such information is current and complete. All products aresold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standardwarranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except wheremandated by government requirements, testing of all parameters of each product is not necessarily performed.TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products andapplications using TI components. To minimize the risks associated with customer products and applications, customers should provideadequate design and operating safeguards.TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Informationpublished by TI regarding third-party products or services does not constitute a license from TI to use such products or services or awarranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectualproperty of the third party, or a license from TI under the patents or other intellectual property of TI.Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompaniedby all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptivebusiness practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additionalrestrictions.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids allexpress and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is notresponsible or liable for any such statements.TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonablybe expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governingsuch use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, andacknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their productsand any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may beprovided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products insuch safety-critical applications.TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products arespecifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet militaryspecifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely atthe Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products aredesignated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designatedproducts in automotive applications, TI will not be responsible for any failure to meet such requirements.Following are URLs where you can obtain information on other Texas Instruments products and application solutions:Products ApplicationsAmplifiers amplifier.ti.com Audio www.ti.com/audioData Converters dataconverter.ti.com Automotive www.ti.com/automotiveDSP dsp.ti.com Broadband www.ti.com/broadbandClocks and Timers www.ti.com/clocks Digital Control www.ti.com/digitalcontrolInterface interface.ti.com Medical www.ti.com/medicalLogic logic.ti.com Military www.ti.com/militaryPower Mgmt power.ti.com Optical Networking www.ti.com/opticalnetworkMicrocontrollers microcontroller.ti.com Security www.ti.com/securityRFID www.ti-rfid.com Telephony www.ti.com/telephonyRF/IF and ZigBee® Solutions www.ti.com/lprf Video & Imaging www.ti.com/videoWireless www.ti.com/wireless
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2008, Texas Instruments Incorporated
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Texas Instruments:
TSW7001EVM