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Tool/software:
I am using dual channel OPA2994IDGKR op amp. 1) I would like to know the exact current consumption when it is full load condition. How Can I calculate ? Please consider that I am using +12V and -12V rail to rail for Pilot generation. 2) Can you suggest 4 channel circuit with same specifications of OPA2994IDGKR?
HI Sandeep,
The current consumption of each OPAx994 op-amp is in essence the quiescent current consumption of each op-amp, plus the output current consumption. Therefore, the total current consumption is a function of the load impedance attached at the output of the OPAx994, and the voltage/amplitude and frequency of the signal the circuit is driving.
The OPAx994 can drive up to ±125mA output current typical. Please review the OPAx994 data sheet Figure 5-13 and Figure 5-14 for the Output Voltage Swing vs Output Current typical characteristic plots on page 11.
The total current consumption of each op-amp can be simulated using TINA-TI (or PSPICE-for-TI) SPICE simulators using the TINA-TI OPAx994 models.
Below is an example of the TINA-TI OPAx994 simulated current consumption of one instance of the OPAx994 driving 500Ω load while powered with ±12V. You will need to modify the circuit for your op-amp configuration and load conditions.
TINA-TI simulation file:
As you have mentioned, the OPAx994 is only available on single and dual versions; there is no exact equivalent on quad version that supports 32V with the high output current to 125mA.
Thank you and Best Regards,
Luis
