TMP468AIYFFR datasheet(33/43 Pages) TI1

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TMP468

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SBOS762 – NOVEMBER 2016

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Typical Application (continued)

(7)

The temperature measurement accuracy of the TMP468 depends on the remote and local temperature sensor

being at the same temperature as the system point being monitored. If the temperature sensor is not in good

thermal contact with the part of the system being monitored, then there is a delay between the sensor response

and the system changing temperature. This delay is usually not a concern for remote temperature-sensing

applications that use a substrate transistor (or a small, SOT-23 transistor) placed close to the device being

monitored.

9.2.3 Application Curve

Figure 25 shows the typical step response to submerging a TMP468 in an oil bath with a temperature of 100°C

and logging the local temperature readings.

Figure 25. Temperature Step Response of Local Sensor

10 Power Supply Recommendations

The TMP468 operates with a power-supply range of 1.7 V to 3.6 V. The device is optimized for operation at a

1.8-V supply but can measure temperature accurately in the full supply range.

TI recommends a power-supply bypass capacitor. Place this capacitor as close as possible to the supply and

ground pins of the device. A typical value for this supply bypass capacitor is 0.1 μF. Applications with noisy or

high-impedance power supplies may require additional decoupling capacitors to reject power-supply noise.

TMP468AIYFFR bảng dữ liệu(PDF) 33 Page - Texas Instruments