ZHCSJ82B December 2009 – December 2018 TMP20
PRODUCTION DATA.
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.
Figure 11. TMP20 Output Filtering NOINDENT:
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.