THS3001: Regarding thermal pad packaging

Shunsuke Yamamoto

Expert 7641 points

Part Number: THS3001
Other Parts Discussed in Thread: THS3491,

Hi teams,

THS3001HVIDGN gas two thermal pad packages like DGN0008D and DGN0008G.

Do we have any ways to specify the thermal pad package?

Best regards,

Shunsuke yamamoto

over 2 years ago

0 Michael Steffes over 2 years ago

Guru 48395 points

The THS3001 is not recommended for new design, has an internal design problem, use the THS3491

0 Shunsuke Yamamoto over 2 years ago in reply to Michael Steffes

TI__Expert 7641 points

Hi Michael-san,

I see.

What is the internal design problem of THS3001?

The reason why I would like to know is that my customer needs to explain the reason why he changed the part to his customer.

If he knows, he will use THS3491.

Best regards,

Shunsuke Yamamoto

+1 Michael Steffes over 2 years ago in reply to Shunsuke Yamamoto

Guru 48395 points

the main bias current setup resistor in the output stage was done as a too narrow structure - this gives too much variability in the output stage quiescent current, when it gets real low, customers have seen designs that were working, start oscillating in the same design.

0 Shunsuke Yamamoto over 2 years ago in reply to Michael Steffes

TI__Expert 7641 points

Hi Michael-san,

Thank you for replying my message.

Specifically how much does the quiescent current affect the output voltage oscillating.

Is THS3491 possible to output +-15V(Vcc = +-18V)?

Or are there any ICs which satisfy above requirements?

Best regards,

Shunsuke Yamamoto

0 Sima Jalaleddine over 2 years ago in reply to Shunsuke Yamamoto

TI__Mastermind 28465 points

Hello Yamamoto-san,

The THS3491 and THS3001 cannot be set at VS+/- 18V. The output voltage range can get close to +/-15V with a 1.5V headroom from either supply, but would the customer be open to a bootstrap design to achieve a high output swing such as shown in this reference design: TIDA-060033 reference design | TI.com.

If not, what is the input signal characteristics, loading at the output of the amplifier, and bandwidth needed?

Thank you,

Sima

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THS3001: Regarding thermal pad packaging