TL054A: Resistance value of internal circuit

Daisuke Higa

Genius 4405 points

Part Number: TL054A
Other Parts Discussed in Thread: TL074, TL054

Hi support team.

I have a inquiry of Tl054A from my customer.

The question is about internal resistance value R7,8,9 in the figure below.

Would you please provide this information?

Best regards.

Higa

TL054AIDR 内部回路図.pdf

over 5 years ago

0 Ron Michallick over 5 years ago

TI__Guru**** 165396 points

Hello Higa,

Figure 26 can be used to determine the resistances. The slopes show source resistance near 220 ohms and a sink resistance near 270 ohms.

0 Daisuke Higa over 5 years ago in reply to Ron Michallick

Genius 4405 points

Hellow Michallick-san

Thank you for quicky reply.

I calculated in below refered to Fig26,

SOURCE : R7+R9=(14V-8V)/27.5mA=218ohm (near 220ohm)

SINK : R8+R9=(13V-8V)/20mA=250ohm (270ohm?)

Is my calculation correct?

Best regards.

Higa

0 kai klaas69 over 5 years ago in reply to Daisuke Higa

Guru 140200 points

Hi Daisuke,

this is the simplified schematic of TL074:

I think the TL074 and TL054 should not be all too different.

Kai

0 Ron Michallick over 5 years ago in reply to Daisuke Higa

TI__Guru**** 165396 points

Higa,

Yes, your calculations are good.

0 Daisuke Higa over 5 years ago in reply to Ron Michallick

Genius 4405 points

Hellow Michallick-san

Thank you for your confirmation!

Best regards.

Higa

0 Daisuke Higa over 5 years ago in reply to kai klaas69

Genius 4405 points

Hi Kai

Thank you for your advice.

I will refer to your information.

Best regards.

Higa

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TL054A: Resistance value of internal circuit