LM62

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SNIS105E – JUNE 1999 – REVISED MARCH 2013

Capacitive Loads

The LM62 handles capacitive loading well. Without any special precautions, the LM62 can drive any capacitive

load as shown in Figure 13. Over the specified temperature range the LM62 has a maximum output impedance

of 4.7 k

Ω. In an extremely noisy environment it may be necessary to add some filtering to minimize noise pickup.

It is recommended that 0.1

Figure 14. In a noisy environment it may be necessary to add a capacitor from the output to ground. A 1

μF

output capacitor with the 4.7 k

Ω maximum output impedance will form a 34 Hz lowpass filter. Since the thermal

time constant of the LM62 is much slower than the 30 ms time constant formed by the RC, the overall response

time of the LM62 will not be significantly affected. For much larger capacitors this additional time lag will increase

the overall response time of the LM62.

Figure 13. LM62 No Decoupling Required for Capacitive Load

Figure 14. LM62 with Filter for Noisy Environment

Figure 15. Simplified Schematic

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