Post Go back to editing

ADA4807 disable pin

Category: Hardware
Product Number: ADA4807-1

Hi, I have question about the usage of disable pin of ADA4807 when using different powering.

In its datasheet page 25 : DISABLE CIRCUITRY,  there is a graph and table to show threshold of disable pin.

if I use +/-3.3 supply for this amplifer, how to calculate the threshold of disable? 

      a. just care about the +Vs, then find the corresponding value below +Vs from graph Vth should be ~2V, then the Enable value is 3.3-1.85 = 1.45 V, Disable value is 3.3- 2.15 = 1.15V

      b. calculate the +Vs-(-Vs) = 6.6V, then find the corresponding value below +Vs from graph Vth should be ~3.5V, then  the Enable value is 3.3-3.35 = -0.05 V, Disable value is 3.3- 3.65 = -0.35V

which one is correct? please help answer this.

Thanks.

Top Replies