Texas Instruments TMP468EVM, Руководство пользователя

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EVM Hardware Overview
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6 SBOU184B – November 2016 – Revised August 2019
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TMP468EVM and TMP468QFNEVM
3.2.4 TMP468 Serial Bus Address
The TMP468 can be configured for one of four serial bus addresses depending on the state of the ADD
pin hole, as shown in
Table 3 . The EVM ships with resistor R9 populated by a 0-
Ω
resistor, shown in
Figure 7 . This R9 resistor sets the default address of the EVM to 48h (hex).
Table 3. TMP468 Slave Address Options
CORRESPONDING
EVM RESISTOR
ADD PIN HOLE CONNECTION
SLAVE ADDRESS
BINARY HEX
R9 GND 1001000 48
R10 V+ 1001001 49
R11 SDA 1001010 4A
R12 SCL 1001011 4B
Figure 7. EVM Address Pin Hole Connections
3.2.5 Shunt Resistor
Shunt resistor R13 connects directly to the TMP468 device. R13 can be removed or replaced in order to
directly measure the current consumption of the TMP468 device.
3.2.6 RC Filter
Each remote channel features an RC Filter. Resistors R1 through R8 and capacitors C1 through C8
comprise the RC filter for each respective channel.
3.2.7 Remote Junction Transistors
The EVM features eight MMBT3904LP transistors for use as remote temperature sensors. Each transistor
is perforated so that it can be separated from the EVM, as shown in
Figure 8 . The schematic connections
for each transistor section is shown in Figure 9 .
Figure 8. Remote Junction Transistors
Figure 9. Connection for NPN Transistors Q1 to Q8