用N76E616AD检测电量

发表于 2021-4-11 08:36

用N76E616AD怎么测量电池电量，设ADCCON0 |= 0x0F; //band-gap 1.25V，用的是内部带隙电压，怎么计算出电池电量，用电池供电，没有AD脚接电池，只通过内部带隙电压能不能测出电池电量？

发表于 2021-4-11 22:46

没有ad引脚，无法测量到准确的电压的吧。

发表于 2021-4-11 23:44

理论上是可以但是没看有人做过实现起来肯定很难毕竟也就是理论上

发表于 2021-4-11 23:52

2楼是对的精度不好搞成本增加不会太多建议还是用上ad

发表于 2021-4-13 07:51

可以，band-gap反推vdd电压。

发表于 2021-4-14 08:43

jasontu 发表于 2021-4-13 07:51
可以，band-gap反推vdd电压。

说的没错

发表于 2021-4-14 10:04

Semiconductor diodes, in conjunction with a constant current source, are sometimes used as
thermometers. It has been observed experimentally that, within a certain temperature range, the
relation between temperature and voltage is almost linear.

发表于 2021-4-14 10:14

One of the possible uses of the bandgap reference, is monitoring supply voltage in battery powered equipment.
Measuring the bandgap voltage, using Vdd as reference, will give higher ADC result as battery get weaker.
In this case, the device might even calibrate its own reference when a fresh battery, or a fully charged accumulator is connected. Som filtering to avoid extreme values may still be needed.

发表于 2021-5-11 18:51

这个型号没有ad的引脚的吗？

发表于 2021-5-11 18:54

硬件上是如何连接的呢

发表于 2021-5-11 18:54

精度能到什么地步

发表于 2021-5-11 18:54

如何测量电量呢？

发表于 2021-5-11 18:56

band-gap反推vdd电压

[技术问答] 用N76E616AD检测电量

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