Texas Instruments ADS1146EVM, User Manual

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Schematics and Layout
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9.2 Troubleshooting
If the ADS1246EVM plug-in cannot find the ADS1246EVM-PDK, press the USB RESET button on the
MMB3 (refer to
Figure 6 ) and try again.
If ADCPro stops responding while the ADS1246EVM-PDK is connected, try unplugging the USB cable
from the PDK. Unload and reload the plug-in before reapplying power to the PDK.
10 Schematics and Layout
Schematics for the ADS1146EVM and ADS1246EVM are appended to this user's guide. The bill of
materials is provided in
Table 7 .
10.1 Bill of Materials
NOTE: All components should be compliant with the European Union Restriction on Use of
Hazardous Substances (RoHS) Directive. Some part numbers may be either leaded or
RoHS. Verify that purchased components are RoHS-compliant. (For more information about
TI's position on RoHS compliance, see the
http://www.ti.com .)
Table 7. ADS1146EVM/ADS1246EVM Bill of Materials
Item No. Qty Value Ref Des Description Vendor Part Number
1 1 N/A ADS1246 EVM PWB Texas Instruments 6508033
2 4 1 μ F C1-C3, C17 Capacitor, X7R Ceramic 1 μ F TDK C1608X7R1C105KT
± 10%, 16WV, Size = 0603
3 2 22 μ F C4, C5 Capacitor, X5R Ceramic 22 μ F TDK C3225X5R1C226MT
± 20%, 16WV, Size = 1210
4 9 0.1 μ F C6-C13, C15 Capacitor, X7R Ceramic 0.1 μ F TDK C1608X7R1E104KT
± 10%, 25WV, Size = 0603
5 1 0.15 μ F C14 Capacitor, X7R Ceramic 0.15 μ F Murata GRM188R71C154KA01
± 10%, 16WV, Size = 0603 D
6 6 10 μ F C16, C18, C19, Capacitor, X5R Ceramic 10 μ F TDK C2012X5R0J106MT
C21-C23 ± 20%, 6.3WV, Size = 0805
7 2 47pF C24, C25 Capacitor, C0G Ceramic 47pF TDK C1608C0G1H470JT
± 5%, 50WV, Size = 0603
8 1 10nF C20 Capacitor, C0G Ceramic 10nF TDK C1608C0G1E103JT
± 5%, 25WV, Size = 0603
9 3 D1, D2, D5 DIODE SCHOTTKY 30V 200MA Fairchild BAT54
SOT-23
10 2 D3, D4 5.1V, Zener Diode On Semiconductor MMBZ5231BLT1G
11 2 J1, J2 Header Strip, 3-pin ( ) Samtec TSW-103-07-L-S
12 1 J3A 10-pin SMT Plug Samtec TSM-105-01-L-DV-P
13 1 J3B 10-pin SMT Socket Samtec SSW-105-22-F-D-VS-K
14 1 J4 Terminal Block, 3 position On Shore ED555/3DS
Technology
15 0 J5 Header Strip, 6-pin ( )
16 2 J6, J9 Header Strip, 2 pin ( ) Samtec TSW-102-07-L-S
17 2 J7A, J8A 20-pin SMT Plug Samtec TSM-110-01-L-DV-P
18 2 J7B, J8B 20-pin SMT Socket Samtec SSW-110-22-F-D-VS-K
19 1 J10 Header Strip, 10-pin ( ) Samtec TSW-105-07-L-D
20 2 Q1, Q2 MOSFET, P-Channel, 2.5V Fairchild FDN302P
21 1 Q3 Enhancement Mode FET, Fairchild FDN337N
N-Channel
22 1 100k Ω RA1 Resistor, 8 Thick Film Chip Array CTS 745C101104JPTR
100k Ω , 5%, 63mW
23 0 RA2 Resistor, Chip Array 4
Independent Bus 100k
Ω , 5%,
1/16W, SMD
24 ADS1146EVM, ADS1246EVM, ADS1146EVM-PDK, ADS1246EVM-PDK SBAU149B – June 2009 – Revised May 2011
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