Texas Instruments ADS1281EVM, User Manual, Page: 26 / 37

Schematics and Layout
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Table 4. Bill of Materials (continued)
Item No. Qty Value Ref Des Description Vendor Part Number
17 4 10 μ F C23, C24, C30, C31 Capacitor, X7R Ceramic 10 μ F ± 20%, TDK C3216X7R1C106MT
16WV, Size = 1206
18 2 10
μ
F C15, C16 Capacitor, X7R Ceramic 10
μ
F
±
20%, TDK C3225X7R1E106MT
25WV, Size = 1210
Not 2 10 μ F C18, C19 Capacitor, X7R Ceramic 10 μ F ± 20%, TDK C3225X7R1E106MT
Installed 25WV, Size = 1210
19 2 22 μ F C2, C3 Capacitor, X5R Ceramic 22 μ F ± 20%, TDK C3225X5R1C226MT
16WV, Size = 1210
20 1 U6 Precision Delta-Sigma ADC, 1 Texas ADS1281IPW
Differential Input, 24-bit Instruments
21 1 U3 Precision Operational Amplifier Texas OPA227U
Instruments
22 1 U4 Fully-Differential Amplifier Texas OPA1632DGN
Instruments
Not 1 U5 Fully-Differential Amplifier Texas OPA1632DGN
Installed Instruments
23 1 U2 Precision Voltage Reference, 2.5V Texas REF5025ID
Instruments
24 1 U1 Precision Voltage Reference, 5V Texas REF5050ID
Instruments
25 1 U8 Inverter, Single Gate Texas SN74AHCT1G04DBVT
Instruments
26 1 U9 Buffer, Open Drain, Single Gate Texas SN74LVC1G07DBVT
Instruments
27 1 U11 Single, 2-Line to 1 Data Texas SN74LVC2G157DCTR
Selector/Multiplexer Instruments
28 1 U13 LDO Voltage Regulator, 2.5V, 200mA Texas TPS72325DBVT
Instruments
29 1 U10 LDO Voltage Regulator, 2.5V, 100mA Texas TPS79225DBVT
Instruments
30 1 U7 Texas PCA9535RGE
16-Bit I
2
C I/O Expander
Instruments
31 1 4.096MHz U12 3.3 V Oscillator Crystek C3391-4.096
32 2 Q1, Q2 MOSFET, P-Channel, 2.5V Fairchild FDN302P
Semiconductor
33 1 Q3 Enhancement Mode FET, N-Channel Fairchild FDN337N
Semiconductor
34 1 U14 EEPROM, 1.8V, 256K Microchip 24AA256-I/ST
35 2 J5A, J6A 20 pin SMT plug Samtec TSM-110-01-L-DV-P
36 2 J5B, J6B 20 pin SMT socket Samtec SSW-110-22-F-D-VS-K
37 1 J8A 10 pin SMT plug Samtec TSM-105-01-L-DV-P
38 1 J8B 10 pin SMT socket Samtec SSW-105-22-F-D-VS-K
39 5 J1 to J4, J10 Header strip, 3 pin ( ) Samtec TSW-103-07-L-S
Not 1 J9 Header strip, 6-pin ( ) Samtec TSW-103-07-L-D
Installed
40 1 J7 Header strip, 10-pin ( ) Samtec TSW-105-07-L-D
41 1 N/A ADS1281_82 EVM PWB Texas 6495106
Instruments
42 2 D5, D6 Schottky diode Fairchild BAT54
43 2 D1, D2 Schottky diode, stacked Fairchild BAT54S
Not 2 D3, D4 Schottky diode, stacked Fairchild BAT54S
Installed
44 2 D7, D8 5.1V Zener diode On MMBZ5231BLT1G
Semiconductor
45 1 S1 Switch, Mini dlide, DPDT NKK SS22SDP2
46 1 TP1 PCB Test Point, Large Loop, Keystone 5011
Through-Hole Electronics
47 9 N/A Shorting blocks Samtec SNT-100-BK-G-H
26 ADS1281EVM and ADS1281EVM-PDK User ' s Guide SBAU143C – March 2009 – Revised May 2011
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