TL783: "High-Voltage Unity-Gain Offset Amplifier" voltage setting method

user3991183

Part Number: TL783

In the data sheet FIG18.
When the input voltage is changed, it is not known how the output voltage changes.
For examlple,
Vcc:70V
R2:82
V+:12V
V-:-12V
INPUT: -5V/0V/2V/6V
Please tell me the calculation method.

And where does "I" in the formula indicate the current flowing?
Vref (I+R2/82)

over 6 years ago

0 Jason Song over 6 years ago

TI__Mastermind 23361 points

Hi,

For this shematic, the calculation is as followings:

Vout = Vin + Voffset = Vin + Vref(1+R2/82)

Regards,
Jason Song

0 Jason Song over 6 years ago in reply to Jason Song

TI__Mastermind 23361 points

Hi

And where does "I" in the formula indicate the current flowing?
Vref (I+R2/82)

--It's actually number one. It does not have anything to do with current.

For example,

Vcc:70V
R2:82
V+:12V
V-:-12V
INPUT: 2V

Vout = Vin + Voffset = Vin + Vref(1+R2/82) = 70 + 1.27 x ( 1 + 82/82) = 70 + 1.27 x 2 = 72.54

Please let me know if it solves your problem now and if something is not clear, please reopen this thread by creating a new reply.

Regards,
Jason

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TL783: "High-Voltage Unity-Gain Offset Amplifier" voltage setting method