Texas Instruments TMP708 Evaluation Module TMP708EVM TMP708EVM 데이터 시트
제품 코드
TMP708EVM
TMP708/709EVM Hardware Overview and Setup
2.2
Electrostatic Discharge Warning
CAUTION
Many of the components on the TMP708/709EVM are susceptible to damage
by electrostatic discharge (ESD). Customers are advised to observe proper
ESD handling precautions when unpacking and handling the EVM, including
the use of a grounded wrist strap at an approved ESD workstation.
by electrostatic discharge (ESD). Customers are advised to observe proper
ESD handling precautions when unpacking and handling the EVM, including
the use of a grounded wrist strap at an approved ESD workstation.
2.3
Connecting the Hardware
Provide power to the test board from a bench-top power supply using the terminal block labeled J1 in the
bottom right corner of the test board, as shown in
bottom right corner of the test board, as shown in
. As labeled, the power supply must be between
+2.7 V and +5.5 V.
Figure 3. Connecting the Power Supply to the Test Board
2.4
TMP708/709EVM Features
This section describes some of the hardware features present on the TMP708/709EVM test boards.
2.4.1
External Power Header
The TMP708/709 test boards feature a terminal block to provide external power. This power is applied
directly to the TMP708/709 device. The power is also regulated by an LDO to power the comparators and
LEDs that indicate temperature switch status.
directly to the TMP708/709 device. The power is also regulated by an LDO to power the comparators and
LEDs that indicate temperature switch status.
2.4.2
Hysteresis Options
The test boards ship with R6 populated by a 0-
Ω
resistor that pulls pin 4 (HYST pin) of the TMP708/709 to
GND. The hysteresis function keeps the outputs from oscillating when the temperature is close to the
threshold. Thus, the HYST pin should always be connected to either VCC or GND by populating either R5
or R6 with a 0-
threshold. Thus, the HYST pin should always be connected to either VCC or GND by populating either R5
or R6 with a 0-
Ω
resistor, respectively. The hysteresis setting is set by the HYST pin, as described in
.
Table 3. Hysteresis Setting
HYST Pin Connection
Device
VCC (
°
C)
GND (
°
C)
TMP708
10
30
TMP709
10
2
4
TMP708/709EVM Evaluation Board and Software Tutorial
SBOU120
–
December 2011
Copyright
©
2011, Texas Instruments Incorporated