LM8261: application

Cooper Zhang1

Part Number: LM8261
Other Parts Discussed in Thread: OPA2991, OPA991

Hi， High current Vcom Driver OPA for TFT LCD application，LM8261 supply voltage is V+ & V- is not suitable，customer wants single supply power opa for VCOM driver， can you help me give a suitable promotion ？5V input ，3.3V in application

over 4 years ago

0 Tim Claycomb over 4 years ago

TI__Genius 15410 points

Hi Cooper,

I recommend taking a look at the OPA2991. The OPA2991 will have a higher output current capability than the LM8261, can operate on a single supply, and has a 21V/us slew rate.

Thank you,

Tim Claycomb

0 Cooper Zhang1 over 4 years ago in reply to Tim Claycomb

Expert 2190 points

Hi Tim：

LM8261 V- can connect to GND ？single V+ 5V power supply ?

0 kai klaas69 over 4 years ago in reply to Cooper Zhang1

Guru 140200 points

Hi Cooper,

yes, of course:

Kai

0 Tim Claycomb over 4 years ago in reply to Cooper Zhang1

TI__Genius 15410 points

Hi Cooper,

Yes, the LM8261 can operate on a single 5V supply. Really any op amp can operate on single supply you just need to watch the common mode voltage of the amplifier when doing so.

While the LM8261 can operate on single supply we have much newer and better amplifiers available like the OPA991 (single channel variant of the OPA2991). The LM8261 was released 21 years ago and has a 1ku price of $0.964. The OPA991 was released in 2019 and has a 1ku price of $0.384 and has better performance.

Thank you,

Tim Claycomb

Amplifiers

Amplifiers forum

LM8261: application