LM7121

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SNOS750A – AUGUST 1999 – REVISED OCTOBER 2014

7 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

7.1 Application Information

Table 1 depicts the maximum operating supply voltage for each package type

Table 1. Maximum Supply Voltage Values

SOT-23

SO-8

Single Supply

10 V

30 V

Dual Supplies

±5 V

±15 V

Stable unity gain operation is possible with supply voltage of 5 V for all capacitive loads. This allows the

possibility of using the device in portable applications with low supply voltages with minimum components around

it.

Above a supply voltage of 6 V (±3 V Dual supplies), an additional resistor and capacitor (shown in Figure 69)

should be placed in the feedback path to achieve stability at unity gain over the full temperature range.

The package power dissipation should be taken into account when operating at high ambient temperatures

and/or high power dissipative conditions. Refer to the power derating curves in the data sheet for each type of

package.

In determining maximum operable temperature of the device, make sure the total power dissipation of the device

is considered; this includes the power dissipated in the device with a load connected to the output as well as the

nominal dissipation of the op amp.

The device is capable of tolerating momentary short circuits from its output to ground but prolonged operation in

this mode will damage the device, if the maximum allowed junction temperation is exceeded.

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