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Power consumption by LMP 7701 when connected to 5V?

Selen Alper
Prodigy 40 points
Other Parts Discussed in Thread: LMP7701

I want to know what the power consumption of this product will be. For this it is enough to know what the current draw will be when the LMP 7701 is connected to 5 Volts.

The datasheet(link below) only list the absolute maximum value(the value before the product is damaged) and the supply current if there is no load(output current=0).

These are not very useful considering what I need.

I want to know what is the worst case scenario, the most current it could possibly use up(this should be less than the absolute maximum value) with the least advantageous conditions(in terms of temperature etc.)

Thank you!!!

http://www.ti.com/product/lmp7701

 

  • 0
    Prodigy 40 points

    Hello, 
    Would anyone be able to assist me with this?

    Thank you. 

  • 0
    TI__Guru 60016 points

    Hello Selen,

    There is a graph of the supply current vs. Supply Voltage (Figure 25) on page 12 of the datasheet. It shows the supply current vs Supply voltage vs Temperature.

    In the 5V Electrical Characteristics page (pg 6), in the "Supply Current" section, the Max column shows 1mA and 1.2mA. The 1.2mA is bolded, which means it is guaranteed over the rated temperature range (-40 to 125°C).

    So what means is that we guarantee that no LMP7701 (operating at the specified conditions) will have more than 1mA quiescent supply current at room temperature, or 1.2mA at any point over the entire rated temperature range.

    Keep in mind that this is only for the amplifier itself. This does not include load current, which can also include feedback resistor loading.

    If you want the absolute current draw, then you must include the loading effects of the feedback resistors and any loads with the amplifier output at maximum swing.

    Regards,