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REF4132-Q1

SNAS795A – FEBRUARY 2020 – REVISED JULY 2020

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8.4 Power Dissipation

The REF4132-Q1 voltage references are capable of source and sink up to 10 mA of load current across the

rated input voltage range. However, when used in applications subject to high ambient temperatures, the input

voltage and load current must be carefully monitored to ensure that the device does not exceeded its maximum

power dissipation rating. The maximum power dissipation of the device can be calculated with Equation 2:

where

•

•

•

•

(2)

Because of this relationship, acceptable load current in high temperature conditions may be less than the

maximum current-sourcing capability of the device. In no case should the device be operated outside of its

maximum power rating because doing so can result in premature failure or permanent damage to the device.

8.5 Noise Performance

Typical 0.1-Hz to 10-Hz voltage noise can be seen in Figure 25 . Device noise increases with output voltage and

operating temperature. Additional filtering can be used to improve output noise levels, although care must be

taken to ensure the output impedance does not degrade ac performance. Peak-to-peak noise measurement

setup is shown in Figure 25.