topic Re: KM35 external voltage reference in Kinetis Microcontrollers

KM35 external voltage reference

NArn — Mon, 10 Jan 2022 21:11:49 GMT

Hello,

What is the maximum voltage of an external voltage reference for MKM35Z512VLQ7? I am considering using a REF7012, which is 1.25 V +- 0.025%, 2ppm/C.

Best regards

Niclas

Re: KM35 external voltage reference

jingpan — Thu, 13 Jan 2022 08:37:42 GMT

Hi @NArn ,

As the NOTE of Figure 34-1 in RM says, you can use externally supplied VREF. But there is no data shows what if external VREF is 1.25V, not 1.2V. In fact, most of people use internal VREF. It is good enough.

Regards,

Jing

Re: KM35 external voltage reference

NArn — Tue, 18 Jan 2022 10:05:04 GMT

Please let me repeat my question: What is the maximum voltage of an external voltage reference for MKM35Z512VLQ7?

Re: KM35 external voltage reference

jingpan — Wed, 19 Jan 2022 02:28:51 GMT

Hi @NArn ,

No such data. I think it should be 1.2V.

Regards,

Jing

Re: KM35 external voltage reference

NArn — Wed, 19 Jan 2022 20:54:29 GMT

So, no reason to spend any more time in this forum? If the NXP staff can only provide information that I should manage to find myself in the published material, what is the point?