I have a project that requires an operational amplifier with an output capable of a peak to peak voltage of at least 10V from d.c. to 1MHz (sinewave), operating from a single rail supply. Fortunately the op-amp will be operating close to unity gain and the load impedance >100kΩ.

Many supposed high frequency op-amps I’ve looked at - their peak-peak output voltage drops close to zero at around 1MHz. Since my circuit requires four op-amps, a device in a dual/quad package would be good.

Any suggestions gratefully received.

 

Hello,

for example such models (one from Texas instruments second from Analog devices):

https://pl.mouser.com/ProductDetail/Texas-Instruments/THP210DR?qs=eP2BKZSCXI6TpSz98mjAmQ==
https://pl.mouser.com/ProductDetail/Analog-Devices/ADA4099-1BUJZ-RL7?qs=BJlw7L4Cy7%2Bo6Rf%2BSWr75Q==

You can seek by6 your own for example in Mouser (changing filters parameters):
https://pl.mouser.com/Semiconductor...cv7Zgjdhub?Rl=4h00gZgjdhplZ1yvm6jvZ1yvm6pdSGT

BTW: on this Mouser page change the location to your contry.

Best regards

 

Thanks for your suggestions, however the data sheet for the THP210 device shows the maximum output Vpp to be around 2.5V at 1MHz, whereas there is no similar graphical data for the 4099-1 device on the data sheet.
This is exactly this issue I’m encountering with the op-amps I’ve looked at so far – perhaps none is available with such a peak to peak voltage output at 1MHz.

 

Hello,

Perhaps the following opamp might interest you:
https://www.analog.com/en/products/lt1360.html#product-overview
https://www.analog.com/en/products/lt1399.html#product-overview

Bertus

 

Thanks for these suggestions, both look possibles – the LT1360 has the better voltage swing, but may not be good on a single rail supply, whereas the LT1399 is designed for single rail operation.

With both models on LTspice, I can try before I buy – Thanks.

 

You might also consider the OPA847