Evaluation Module
THS7313
SLOS483 – NOVEMBER 2005
An evaluation module (EVM) is available for the TPS7313. Because the THS7313 is controlled by the I
2
C lines,additional control is required—rather than simple switches. To ease control, an USB-to-I
2
C interface wasdesigned onto the EVM. A computer running either Windows 2000 or XP is then connected to the EVM throughthe USB cable. A computer program interface allows graphical control of the THS7313 that allows both read andwrite functions to be performed. The EVM comes with a CD-ROM loaded with all the required software to installthe command software on to the computer.
To program the THS7313, the user selects the channel, the filter, and the mode of operation, and selects theExecute button. The Req Done light on the computer screen is lit to confirm that the command was executed bythe THS7313. The same procedure is done for each and every channel. To read the THS7313 registers, changethe switch to Read, select the channel, and then select the Execute button. The resulting register contentappears in hexadecimal code.
Note that the USB-to-I
2
C interface circuitry must be powered by a 3.3-V supply only. Additionally, the I
2
C circuitrysection must be powered on either at the same time as the THS7313 or before power is applied to the THS7313.This is due to the reading of the EEPROM, the TAS1020 device must complete to program its core. The yellowLED in the I
2
C section is lit if the TAS1020 was programmed properly. If this LED is not lit, then cyclng the powershould be done to reset the USB-to-I
2
C TAS1020 chip.
Table 4 is a bill of materials, the board layout is found in Figure 66 through Figure 69 .
Table 4. Bill Of MaterialsSMD REFERENCE PCB MANUFACTURER'S DISTRIBUTER'SITEM DESCRIPTION
SIZE DESIGNATOR QUANTITY PART NUMBER
(1)
PART NUMBER
1 BEAD, FERRITE, 2.5A, 80 OHM 0805 FB1, FB2, FB3 3 (TDK) MPZ2012S331A (DIGI-KEY) 445-1569-1-ND
CAP, 22uF, TAN, 6.3V, 10%, LO (AVX)2 A C30 1 (DIGI-KEY) 478-1754-1-NDESR TPSA226K006R0900
CAP, 100uF, TAN, 10V, 10%, LO (AVX)3 C C5 1 (DIGI-KEY) 478-1765-1-NDESR TPSC107K010R0100
C2, C3, C8, C11,4 OPEN 0805 C12, C14, C17, C21, 9C23
CAP, 33pF, CERAMIC, 50V,5 0805 C31, C32 2 (AVX) 08055A330JAT2A (DIGI-KEY) 478-1310-1-NDNPO
CAP, 47pF, CERAMIC, 50V,6 0805 C27, C29 2 (AVX) 08055A470JAT2A (DIGI-KEY) 478-1312-1-NDNPO
CAP, 100pF, CERAMIC, 50V,7 0805 C34 1 (AVX) 08055A101JAT2A (DIGI-KEY) 478-1316-1-NDNPO
CAP, 1000pF, CERAMIC, 100V,8 0805 C33 1 (AVX) 08051A102JAT2A (DIGI-KEY) 478-1290-1-NDNPO
CAP, 0.01uF, CERAMIC, 100V,9 0805 C19, C28 2 (AVX) 08051C103KAT2A (DIGI-KEY) 478-1358-1-NDX7R
C4, C6, C9, C13,CAP, 0.1uF, CERAMIC, 50V,10 0805 C16, C22, C25, C26, 11 (AVX) 08055C104KAT2A (DIGI-KEY) 478-1395-1-NDX7R
C43, C44, Z4
C18, C35, C36, C37,11 CAP, 1uF, CERAMIC, 16V, X7R 0805 C38, C39, C40, C41, 11 (TDK) C2012X7R1C105K (DIGI-KEY) 445-1358-1-NDC42, Z5, Z6
(CORNELL)12 CAP, ALUM, 470uF, 10V, 20% F C1, C10, C20 3 (NEWARK) 97C7597AFK477M10F24B
(CORNELL)13 CAP, ALUM, 33uF, 25V, 20% C C7, C15, C24 3 (NEWARK) 97C7564AFK336M25C12B
14 OPEN 0603 R47, R48, R49, R51 4
R1, R2, R3, R4, R6,15 RESISTOR, 0 OHM 0603 9 (ROHM) MCR03EZPJ000 (DIGI-KEY) RHM0.0GCT-NDR7, R19, R20, R23
RESISTOR, 2.74K OHM, 1/8W, (ROHM)16 0603 R41, R61 2 (DIGI-KEY) RHM2.7KHCT-ND1% MCR03EZPFX2741
17 OPEN 0805 R15, R16, R28 3
R9, R13, R21, Z1, Z2,18 RESISTOR, 0 OHM 0805 6 (ROHM) MCR10EZHJ000 (DIGI-KEY) RHM0.0ACT-NDZ3
(1) Manufacturer's part numbers are used for test purposes only.
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