Frosty_47
New Member
Hello,
There seems to be a deficiency in operational amplifiers with output voltage swings above 100V (OPA454). High Voltage op-amps made by APEX such as PA89 can be biased by + or - 600V, with similar output swings, however their $680 price per unit will shock most designers. National Semiconductor provides a high voltage op-amp (LME49811 and LME49830) that can be operated with voltages up to + or - 100V (200V differential), however the output voltage swing is limited to about 68V rms when biased with + and - 100V. This may not be enough for certain applications. So I would like to ask if it is possible to achieve higher output voltage by using single supply to the LME49811 (for instance: V+ =200V and V- = GND). The datasheet does not seem to mention anything on this matter.
Thanks
Note: Assume the input signal to the op-amp is TTL (above GND level).
There seems to be a deficiency in operational amplifiers with output voltage swings above 100V (OPA454). High Voltage op-amps made by APEX such as PA89 can be biased by + or - 600V, with similar output swings, however their $680 price per unit will shock most designers. National Semiconductor provides a high voltage op-amp (LME49811 and LME49830) that can be operated with voltages up to + or - 100V (200V differential), however the output voltage swing is limited to about 68V rms when biased with + and - 100V. This may not be enough for certain applications. So I would like to ask if it is possible to achieve higher output voltage by using single supply to the LME49811 (for instance: V+ =200V and V- = GND). The datasheet does not seem to mention anything on this matter.
Thanks
Note: Assume the input signal to the op-amp is TTL (above GND level).