Texas Instruments TMP451, User'S Manual And Software Tutorial

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TMP451EVM Features
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Figure 3-2. Confirmation of SM-USB-DIG Platform Driver Installation
3.2.1 Optional 10-pin Connector Ribbon Extender
The TMP451EVM kit is shipped with an optional ribbon cable for extending the connection between the
SM-USB-DIG and the PCB. This can be useful if high temperature tests need to be run on the test board,
since the SM-USB-DIG is not rated for high temperatures. To connect the ribbon cable, attach the cable to
the EVM and SM-USB-DIG as shown in
Figure 3-3 .
Figure 3-3. 10-Pin Ribbon Cable Extender
3.3 TMP451EVM Features
This section describes some of the hardware features present on the TMP451EVM.
3.3.1 I2C Translator and Test Points
One of the features of the TMP451 is the ability of the part to be powered at 1.8 V while the
communication is still at 3.3 V. The TMP451EVM is equipped with an on board I
2
C level translator. This
allows the TMP451 and the I
2
C to be operated at 3.3 V or 1.8 V by shunting 3.3 V or 1.8 V on J3 and J2.
The I
2
C test points SDAB and SCLB are connected to the I
2
C line of the SM-USB-DIG and run to the input
of the level translator, U2. The I
2
C test points SDAA and SCLA are connected to the output of the level
translator, U2, and run to the clock and data lines of the TMP451.
3.3.2 Remote Temperature Terminal Block, J4
The TMP451EVM has a terminal block, J4, used for attaching a remote temperature sensor, in this case a
NPN transistor which is included in the kit. To connect the transistor, attach the base and collector to D+
and the emitter to D- as shown in
Figure 3-4 .
10 TMP451EVM Hardware Overview SBOU131 – June 2013
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