Vin = 0 – 5 V, Vout = 0 – 3 V

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Vin = 0 – 5 V, Vout = 0 – 3 V

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Transfer Curve

attenCase1_TF

Circuit Diagram

 

5vto3v

 

The non-inverting attenuation can be performed with a voltage divider and a buffer circuit. The voltage divider circuit, R1 and R2 use to reduce the input voltage form 5 V to 3 V. The value of resistor can calculate by:

Example

 Vo        = VR2 (+ input pin)

 VR2        = Vi ×R2/(R1+R2)

Give R2 = 75 kΩ, Vi = 5 V, Vo = 3 V

 R1        = ((Vi ×R2)/VR2)-R2

         = ((5V ×75kΩ)/3V)-75kΩ

         = 50kΩ

 

Configuration of aMG SIGCON-A: Soldering to Jump J4, X2, and X8. Place 50 kΩ resistor to X3, and 75 kΩ to X5.

 

AttenCase1_config

 

Demo

atten5_demo

Input VS Output Signal

5to3_scope