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RN5RY202A-TL Datasheet(PDF) 9 Page - RICOH electronics devices division |
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RN5RY202A-TL Datasheet(HTML) 9 Page - RICOH electronics devices division |
9 / 9 page NOTES ON OUTPUT VOLTAGE SETTINGS RN5RY202 9 VOUT RIC GND R2 R3 I3 I2 IIC 2.0V VOUT Output setting voltage is determined using the following formulas : I2=IIC+I3 ..........................................................................................(1) I3=2.0/R3 ........................................................................................(2) From (1) and (2) above, I2=IIC+2.0/R3..................................................................................(3) VOUT=2.0+R2 × I2............................................................................(4) By substituting (3) into the above formula VOUT=2.0+R2 × (IIC+2.0/R3) =2.0 × (1+R2/R3)+R2× IIC ....................................................(5) The second term, R2 × IIC in the formula (5) above may cause a voltage setting error. Here, consider the formula in terms of IIC, IIC=2.0/RIC .....................................................................................(6) then R2 × IIC that causes the error will be as shown below : R2 × IIC=R2× 2.0/RIC =2.0 × R2/RIC......................................................................(7) Thus, when R2<<RIC the error can be minimized. |
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