AD8207 or AD8210

I need a high side current sense amplifier for motor driver applicaiton.

Both AD8207 and AD8210 have the same fixed gain (20). Both of them seem to be possible for high side current sense applicaiton (from PWM side) but which one is better ?

AD8207 is used in the reference design of low voltage motor driver board . Probably I will use AD8207 but I'm not sure it's the best decion or not.

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  • Hi Emman,

    In our applicaitons PWM frequency is between 20kHz-80kHz.

    While comparing the devices you check the common mode rejection graph vs frequency?

    I have one question too. The cmrr vs freq. graph is measured when a sinusoidal common mode input is applied to the inputs. But for pwm singal since it's a square wave should I also consider the effect of harmonics at switching frequency?

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  • Hi Emman,

    In our applicaitons PWM frequency is between 20kHz-80kHz.

    While comparing the devices you check the common mode rejection graph vs frequency?

    I have one question too. The cmrr vs freq. graph is measured when a sinusoidal common mode input is applied to the inputs. But for pwm singal since it's a square wave should I also consider the effect of harmonics at switching frequency?

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