LMH6502: LMH6502 single power supply

Kailyn Chen

Part Number: LMH6502

Hi,

I use LMH6502 with single power supply according to the datasheet Figure 61, but when I simulate with TINA , the result is always a DC signal and close to saturation.

Please help to check .

LMH6502.TSC

Best regards

Kailyn

over 6 years ago

0 Hasan Babiker31 over 6 years ago

TI__Genius 15565 points

Hello Kailyn,

The main issue here is that the LMH6502 model is only meant to be used with +/- 5V supplies. I've attached another schematic with these supplies so that you could use for reference. As another note, when using this device in single supply operation, the Vg pin will need to be set to 8V rather than 2V because the GND pin is now set to mid-supply.

6266.Kailyn.TSC

Best,

Hasan Babiker

0 kai klaas69 over 6 years ago

Guru 140200 points

Hi Kailyn,

Kai

0 Kailyn Chen over 6 years ago in reply to kai klaas69

TI__Genius 9560 points

Dear Kai,

Thank you very much for your help.

Best regards

Kailyn

0 Dylan_hua over 6 years ago in reply to Hasan Babiker31

Prodigy 50 points

If i use 6502 with a 5V single supply,the mid-supply is 2.5V.Is Vg range is 2.5V~4.5V？

0 Hasan Babiker31 over 6 years ago in reply to Dylan_hua

TI__Genius 15565 points

Hello,

Yes, Vg range will be 2.5~4.5V in this case.

Best,

Hasan Babiker

0 Dylan_hua over 6 years ago in reply to Hasan Babiker31

Prodigy 50 points

I use your TINA model that I modify Vg and Vf. Why the gain that using "A " to express in the simulation file decrease with increasing input voltage ?LMH6502-low voltage supply.TSC

0 kai klaas69 over 6 years ago in reply to Dylan_hua

Guru 140200 points

Hi Dylan,

the LMH6502 TINA model simulates the behaviour of the LMH6502 for +/-5V supplies ONLY!

e2e.ti.com/.../2774008

It will NOT work for your +/-2.5V supplies.

Kai

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LMH6502: LMH6502 single power supply