topic Re: NAFE13388 in Other NXP Products

NAFE13388

Bestsy — Fri, 14 Feb 2025 17:36:00 GMT

Hi all, I would like to use a NAFE13388 to make a multimeter board. This board measures a DC voltage from another board with two wires, the range is 0 to 80V.
My questions are:
*what's the max current consumption for 3V3, 15V and -15V?
*what is the best configuration to have the best performance to measure this voltage? A resistor divider to max 10V and to enter with single ended? Use differentials?

Many thanks.

Re: NAFE13388

JozefKozon — Tue, 18 Feb 2025 06:27:59 GMT

Hi Bestsy,

*what's the max current consumption for 3V3, 15V and -15V?

I don't understand the maximum current absorbed for +15V, the maximum current absorbed for -15V and the maximum current absorbed for +3V3, it seems that it's not specified in the datasheet.

[A] Do you mean the current consumption of the NAFE13388 component? Or current flowing to and from the AIxP, and AIxN pins?

JozefKozon_0-1739860062940.png

With Best Regards,

Jozef

Re: NAFE13388

Bestsy — Mon, 17 Feb 2025 19:53:18 GMT

Hi Jozef, thanks for your reply.
I don't understand the maximum current absorbed for +15V, the maximum current absorbed for -15V and the maximum current absorbed for +3V3, it seems that it's not specified in the datasheet.

Re: NAFE13388

Bestsy — Tue, 18 Feb 2025 13:39:40 GMT

the max current consumption of the NAFE13388 component, but divided for HVDD (+15V), HVSS(-15V), AVDD/DVDD (+3V3) to design correctly the 3 PSU to generate these voltages.

Re: NAFE13388

JozefKozon — Wed, 19 Feb 2025 06:23:48 GMT

Hi Bestsy,

thank you for clarification.

*what's the max current consumption for 3V3, 15V and -15V?

[A] For the maximum current consumption at HVDD=-HVSS=15V, or HVDD=15V, HVSS=-15V and VDD=AVDD=DVDD = 3.3V, please add up the three values from the Table 49. The maximum current consumption will be 17mA+4.9mA+4.8mA=26.7mA.

JozefKozon_1-1739946208697.png

*what is the best configuration to have the best performance to measure this voltage? A resistor divider to max 10V and to enter with single ended? Use differentials?

[A] Differential would be most accurate.

With Best Regards,

Jozef