MK64FX512 : VREF_OUT voltage drift

koichisakagami — Sat, 05 Dec 2015 02:02:18 GMT

Dear community,

We consider the VREF_OUT voltage drift.

In DataSheet Table 36. VREF full-range operating behaviors ,
It is described that VOUT = 1.198 V (max);( Vout Voltage reference output with factory trim at nominal VDDA and temperature= 25 °C ) .

Vtdrift = 15mV ( max ) ;(Vmax -Vmin across the full temperature range)
Vvdrift = 2mV ( max );(Vmax -Vmin across the full voltage range)

Next,
Table 38. VREF limited-range operating behaviors ,
It is described that VOUT = 1.225 V (max);temperature= 0 ~ 50 °C

We calculated a max case value for voltage drift.
1.198 + 0.015 + 0.002 = 1.215

[Question]
Why is the max case value ( we calculated) smaller than Table 38 value ?
1.215 < 1.225

Best Regards,
Koichi Sakagami

Re: MK64FX512 : VREF_OUT voltage drift

xiangjun_rong — Mon, 07 Dec 2015 06:56:59 GMT

Hi, Koichi,

It seems that there is discrepancy as you said. I seems that that the Vtdrift spec has issue, some data sheet says that the maximum of Vtdrift is 80mV instead of 15mV. You can download the data sheet of the other Kinetis K family.

Xiangjun Rong

Kinetis MicrocontrollersのトピックMK64FX512 : VREF_OUT voltage drift

MK64FX512 : VREF_OUT voltage drift

Re: MK64FX512 : VREF_OUT voltage drift