Rainbow Electronics LM50 - Manual (Page 5)

2.0 Capacitive Loads
(Continued)
pass the power supply voltage, as shown in Figure 4 . In a
noisy environment it may be necessary to add a capacitor
from the output to ground. A 1 µF output capacitor with the
4 k
Ω output impedance will form a 40 Hz lowpass filter. Since
the thermal time constant of the LM50 is much slower than
the 25 ms time constant formed by the RC, the overall re-
sponse time of the LM50 will not be significantly affected. For
much larger capacitors this additional time lag will increase
the overall response time of the LM50.
3.0 Typical Applications
DS012030-17
*R2 ≈ 2k with a typical 1300 ppm/˚C drift.
FIGURE 5. Block Diagram
DS012030-11
FIGURE 6. Centigrade Thermostat/Fan Controller
DS012030-13
FIGURE 7. Temperature To Digital Converter (Serial Output) (+125˚C Full Scale)
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