R

(1)

1 nF

TMP20

MSP430

C

(1)

TMP20

MSP430

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11

TMP20

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SBOS466B – DECEMBER 2009 – REVISED DECEMBER 2018

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8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

8.1.1 Output Drive and Capacitive Loads

When used in noisy environments, adding a capacitor from the output to ground with a series resistor filters the

TMP20 output; this configuration is shown in Figure 11. The TMP20 can drive up to 1 nF of load capacitance

while sourcing and sinking 600 μA. Under this condition, capacitive loads in the range of 1 nF to 10 μF require a

150-

Ω series output resistor to achieve a stable temperature measurement. The output impedance of the TMP20

is typically 10 Ω when sinking currents and less than 1 Ω when sourcing current, as shown in Figure 1.

(1) A series resistor (R) may be required depending upon the amount of capacitance (C) and the amount of source and sink current drawn

from the output of the TMP20.

Figure 11. TMP20 Output Filtering