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Hello,
Regarding the current consumption of nvSRAM, the data sheet has the following description.
tRC = 25 ns, max 70 mA,
tRC = 45 ns, max 52 mA
Please send it if there is a calculation formula of current consumption.
Best Regards,
Naoaki Morimoto
Solved! Go to Solution.
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Hi Naoaki,
There is a way to estimate the current for different frequencies from values available in the datasheet.
Usually active current (ICC) has two components - Static (due to circuits biased in active mode) + switching currents which vary linearly with frequency.
Let us say fixed component is x mA and the switching current component is y mA.
According to datasheet-
200-ns or 5 MHz current is 35 mA; which equates to x+5y= 35 ----eqn 1;
45- ns or ~22 MHz current is 52 mA; which equates to x+22y=52 --- eqn 2.
Solving eqn 1 and eqn2 gives x= 30 mA; y = 1 mA or 1 mA/MHz.
Therefore, 25 ns or 40 MHz becomes - 30 + 40*1= 70 mA.
If you want to calculate, say for 33-ns or 30 MHZ, it will equate to 60 mA.
I hope this helps. Please let me know if any questions.
Rgds,
Shivendra
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Hello,
Please also mention the part number.
Thanks,
Pradipta.
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Hi Pradipta-san,
The part number is CY14B104K-ZS45XIT.
Regards,
Naoaki Morimoto
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Hello Pradipta-san,
Do you have any update on this?
Regards,
Naoaki Morimoto
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Hi Naoaki,
There is a way to estimate the current for different frequencies from values available in the datasheet.
Usually active current (ICC) has two components - Static (due to circuits biased in active mode) + switching currents which vary linearly with frequency.
Let us say fixed component is x mA and the switching current component is y mA.
According to datasheet-
200-ns or 5 MHz current is 35 mA; which equates to x+5y= 35 ----eqn 1;
45- ns or ~22 MHz current is 52 mA; which equates to x+22y=52 --- eqn 2.
Solving eqn 1 and eqn2 gives x= 30 mA; y = 1 mA or 1 mA/MHz.
Therefore, 25 ns or 40 MHz becomes - 30 + 40*1= 70 mA.
If you want to calculate, say for 33-ns or 30 MHZ, it will equate to 60 mA.
I hope this helps. Please let me know if any questions.
Rgds,
Shivendra