The STLM20 will handle capacitive loads of up to 300pF. Over the specified temperature
range, the STLM20 has a maximum output impedance of 160Ω.
In a noisy environment, it may be advisable to add some filtering to minimize noise in the
output voltage. A 0.1µF capacitor added between the supply voltage and ground is
In an extremely noisy environment, it may be necessary to add a low-pass filter network to
the output of the device. A 1µF capacitor, in addition to the output impedance of the device,
and a 200Ω series resistor, will provide a low-pass filter that will pass the slow thermal time
constant of the STLM20, while filtering the higher frequency noise.
Figure 3. Filter network for noisy environments or capacitive loads > 300pF
Resistor/capacitor combinations for the filter network