On-detector Optoelectronics Power Budget

The nominal and worst case power consumptions for the opto-ASICs are given in the table below.

 
Component Nominal Power (mW) Worst Case Power (mW) Nominal Current (mA) Worst Case current (mA)
VDC
Nominal
offset current= 4 mA
2 channels @ nominal 
I(VCSEL)=10 mA

Worst case
I(VCSEL)=20 mA

Power Supply VDD=4.2 V

    
96
 
 
 

  185
 
 

   24
 

 
 
 
 
 

  44
 
Vset for I(VCSEL)  8   17   2   4
DORIC4A
Nominal

VDD=4V
I= 65  mA
 

Nominal
 

Worst Case

 
Power supply, VDD = 4.2 V
=> 17% increase in I plus
allow for 3% due to change in resistance with radiation

260

  
 
 

  

329

  65
 
 
 
 
 
 
 

  78
 
Total Opto-hybrid
(VDC+DORIC4A)		 364 531

The nominal and maximum currents on the power power supplies are given in the table below.
 

Voltage   Nominal Current (mA) Maximum Current (mA)
VDD   89 122
V(ISET)   2      4


 
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