Datasheet

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
J6
Male
ONE_WIRE
Vdut
Vcc
DAC_A
DAC_B
DAC_C
DAC_D
ads2_Vin+
ads1_Vin+
ads2_Vin-
I2C_SDA_ISO
ads1_Vin-
I2C_SCK_ISO
INA-
XTR -Loop
XTR +Loop
-15V
+15V
USB_DIO
USB_SCK
USB_CS1
I2C_SCK
I2C_SDA2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
J5
Female
NC
CTRL1
CTRL2
CTRL3
CTRL4
CTRL5
CTRL6
CTRL7
CTRL8
MEAS1
MEAS2
MEAS3
MEAS4
MEAS5
MEAS6
MEAS7
MEAS8
CTRL1
RELAY_EN3
CTRL5
CTRL6
CTRL7
Relay1
VCC
Relay3
Relay5
Relay6
Relay7
POT2
POT1
R24
N/I
R23
N/I
R22
N/I
POT4
POT3
R27
N/I
R26
N/I
R25
N/I
POT6
POT5
R30
N/I
R29
N/I
R28
N/I
1
2
3
JMP2
1
2
3
JMP3
1
2
3
JMP1
LO(F) LO(S) HI(F) HI(S)
Relay3
VCC
Relay3
VCC
VCC
RTD +
RTD +
VCC
RTD +
Relay5
VCC
RTD +
Relay6 Relay7
HI(F) LO(F)
Relay2
VCC
I(F)
LO(F)
HI(F)
LO(S)
HI(S)
LO(F) I(F)
VCC
Relay1
SCK DIOCS1
USB_SCK
USB_DIO
USB_CS1
1
2
3
J7
SPI
1
2
J2
1
2
J3
1
2
J4
Jumper
1-2 = POT Select
2-3 = Resistor Seslect
Comments
JMP1
JMP2
JMP3
RTD -
RTD -
Panasonic Panasonic
1 2 3
J8
RTD_CON
RTD_MIN RTD_MID RTD_MAX
Vo_XTR108
Io_XTR108 Loop Supply
Io+
Io -
Vo +
Vo -
Rz
Rcm
Female
Io+
Io -
Vo +
Vo -
Rz_Out
Rcm
RTD +_Out
RTD Emulator (Min/Mid/Max)
RTD Sense -- 4-Wire RTD Measurement via DMM
SPI_SCK
SPI_DIO
SPI_CS1
SPI
Transmit Loop: Connect/Disconnect DMMVoltage Output Mode (Vout Measure)
Mode Comments
Relay 2 = ON
Voltage
Measurement
Relay 1 = ON
Relay 3 = ON
Relay 4 = Under-scale
Relay 5 = Min
Relay 6 = Mid
Relay 7 = Max
Relay 8 = Over-scale
Current
Measurement
RTD
Measurement
RTD Select
Relay Control
2
1
D0
SMAJ6.0A
1
2
3
U4
BAT754S,215
R34
100
1
HI(S)
1
LO(S)
1
HI(F)
1
LO(F)
1
I(F)
R31
100
R32
100
R35
100
R33
100
R36
100
1
2
3
U3
BAT754S,215
1
2
3
U2
BAT754S,215
VCCVCCVCC
Jumper Functionality
Relay Driver / Control Bits
R10
10
3296Y-501
3296Y-1-100
500
10
3296Y-1-100 3296Y-1-100
10 10
500 500
R11
10
R12
10
3296Y-501 3296Y-501
RcmRz RTD
Vo -Vo +
Loop Supply +
Loop Supply -
Io +
Io -
R1
4.7k
R2
4.7k
R3
4.7k
R4
4.7k
R5
4.7k
R6
4.7k
R7
4.7k
CS1
SCK
DIO
POT_RTD R_RTD POT_RTD R_RTD POT_RTD R_RTD
C1
10uF
USB_DAQ_EVM_CONNECT
Rz
Rcm
RTD
SPI_SCK
SPI_DIO
SPI_CS1
ON
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
J1
DB15
D5
Relay 5
R14
510
D6
Relay 6
Relay5 Relay6 Relay7
D7
Relay 7
R16
510
R15
510
D4
Relay 4
R13
510
D3
Relay 3
R20
510
Relay3
Relay4
D1
Relay 1
R19
510
Relay1
D2
Relay 2
R18
510
Relay2
**Note: Relays Are Initially OFF. A CTRL Logic High Turns On Each Relay
**Note: SPI Data Input Connected to Data Output atPins 24, 25
Loop +
Loop -
Vo +
Vo -
Io +
Io -
XTR108 Sensor Board Connector
Multimeter Connect
Panasonic
ON
Panasonic
Vcc GND
VCC VCC VCC
VCC
VCC
VCC VCC
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K5
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K6
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K7
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K3_1
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K3_2
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K2
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K1
TXS2SS-4.5V
1
2
3
4
5
6
7
8
TPG1
1
2
3
4
5
6
7
8
TPG2
CTRL1
CTRL2
CTRL3
CTRL4
CTRL5
CTRL6
CTRL7
Relay1
Relay2
Relay3
Relay4
Relay5
Relay6
Relay7
VCC
VCC
VCC
VCC
VCC
VCC
VCC
**Note: N/I = Not Installed
1
2
3
4
5
U6
SN74AHC1G08DBVR
2
3
4
5
U5
SN74AHC1G04DBVR
VCC
VCC
Relay2
1
2
3
4
5
U7
SN74AHC1G08DBVR
VCC
Relay4
CTRL1 CTRL2 CTRL3
RELAY_EN2 RELAY_EN3
CTRL4
RELAY_EN2
Interface Protection: Relay 2/3 Enable
CTRL/Relay Test Connectors
C2
0.1uF
C3
0.1uF
C4
0.1uF
GND1 GND2
CTRL8
Relay8
Rz_Out
RTD +_Out
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K3_3
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K4
TXS2SS-4.5V
1 12
3
4
5
10
9
8
OFF
ONON
OFF
K8
TXS2SS-4.5V
VCC
Rz_OutRTD +_Out
Relay3
RTD + Rz
**Note: K3 and K4 connect RTD emulator to DMM connectors. K8 disconnects RTD emulator from sensor board to ensure accurate readings when configuring pots.
VCC VCC
Relay4 Relay8
RTD + RTD +
D8
Relay 8
R17
510
Relay8
VCC
R9
10
R21
5k
RTD -
RTD Emulator (Under-scale/Over-scale)
Relay8CTRL8
R8
4.7k
VCC
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
8B
8
GND
9
1C
18
2C
17
3C
16
4C
15
5C
14
6C
13
8C
11
COM
10
7C
12
U1 ULN2803A
Miscellaneous
Hardware Documentation www.ti.com
7 Hardware Documentation
This section provides the hardware documentation for the XTR108EVM-USB, including board schematics,
layouts, and bill of materials.
7.1 Schematics
Figure 34 shows the XTR108EVM-USB Interface Board schematic.
Figure 34. XTR108EVM-USB Interface Board Schematic
48
XTR108EVM-USB Evaluation Board and Software Tutorial SBOU123–March 2012
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