STLM20DD STMICROELECTRONICS [STMicroelectronics], STLM20DD Datasheet - Page 11

• Manufacturer Part Number: STLM20DD
• Description: Ultra-low Current 2.4V precision analog temperature sensor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STLM20
5
Capacitive load
The STLM20 will handle capacitive loads of up to 300pF. Over the specified temperature
range, the STLM20 has a maximum output impedance of 160 .
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
recommended.
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 200 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.
Table 7.
C FILTER
R FILTER
Filter network for noisy environments or capacitive loads > 300pF
Resistor/capacitor combinations for the filter network
R
1000
100k
200
470
680
10k
FILTER
GND
Bypass Capacitor
0.1µF
V CC
V OUT
AI12259
C L
C FILTER
GND
Bypass Capacitor
C
1000pF
0.01µF
100pF
0.1µF
10pF
FILTER
1µF
0.1µF
V CC
Capacitive load
V OUT
R FILTER
AI12260
C L
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