EDA_hg81
Advanced Member level 2
I am using a Zener Diode to establish a 2.5V reference voltage.
I forget the part number of Zener but it is connected with a 30K resistor.
When I put the sensor on my circuit this Zener diode lost regulation.
The following are the data.
Thanks.
I forget the part number of Zener but it is connected with a 30K resistor.
When I put the sensor on my circuit this Zener diode lost regulation.
The following are the data.
Can I decrease the 30k resistor for generating higher current or have to use another one?Input voltage is 5V.
Desired Reference is 2.5V
Current reference voltage is 0.8V
Serial connection resistor with Zener diode is 30K suggested by datasheet.
Can I use the following way to find the current load resistance?
Finding current: (5 – 0.8 )/30000 = 0.14mA
Finding desired current: (5-2.5)/30000 = 0.083mA
The minimum load resistance before Zener diode loses regulation is: (5-2.5)/0.083mA = 30K
The current load resistance: 0.8/(0.14-0.083) = 14K
Thanks.