(ADuM140E1)Supply current.

Question

Hi ! 
 Q1) 
 Our customer want to know the supply current. 
 I already asked about this and you gave me ADuM142's spread sheet. 
 (ADuM140)Supply current with OOK. 
 Can you give me the same thing for ADuM140? 
 Q2) 
 Also , ADI's newest iCoupler series is very difficult to calculate the supply power. 
 Do you have any plan to update the datasheet or make a new application note for this? 
 Best regards 
 Kawa

ADIApproved · Accepted Answer

Kawa-san: 
 I will show you here the formula for supply current from the designer. I will be away on vacation for 1 week, but since you say it is not urgent perhaps you may ask your follow up questions when I return after August 10th. 
 Regards, Brian

ADuM14x IDD1 Calculation : 
 IDD1 = IDD1(Q) + num_of_in_vdd1*(2.8mA*D + 0.01mA/Mbps*Mbps ) + num_of_out_vdd1* 0.02mA/Mbps*Mbps

ADuM14x IDD2 Calculation: 
 IDD2 = IDD2(Q) + num_of_in_vdd2*(3.4mA*D + 0.01mA/Mbps*Mbps ) + num_of_out_vdd2 * 0.02mA/Mbps*Mbps

where 2.8mA = continuous oscillator on current of top coil

where 3.4mA = continuous oscillator on current of bottom coil

D = oscillator duty cycle

IDDI(D) = 0.01mA/Mbps = dynamic input current

IDDO(D) = 0.02mA/Mbps = dynamic output current

Variables 
 Definition 
 ADuM140 
 ADuM142

Num_of_in_vdd1 
 num of input on VDD1 side 
 4 
 2

Num_of_out_vdd1 
 num of output on VDD1 side 
 0 
 2

Num_of_in_vdd2 
 num of input on VDD2 side 
 0 
 2

Num_of_out_vdd2: 
 num of output on VDD2 side 
 4 
 2