ADS7816: Internal equivalent circuit of the ADS7816

yoshiki hasebe

Part Number: ADS7816
Other Parts Discussed in Thread: ADC088S052

Dear Sirs,

My customer asked us internal equivalent circuit of the ADS7816.

There is a symptom that Vcc changes from 5 V to 3.1 V in the ADS7816.
So please tell me the internal equivalent circuit of the ADS7816 pin that may cause this symptom.

Best　Regards,

Y.Hasebe

over 7 years ago

0 Michael Stout over 7 years ago

TI__Genius 16890 points

Hello,

We do not have an equivalent circuit available.

Most SAR ADCs have an input circuit similar to what is shown in Figure 37 of the ADC088S052 datasheet. The ADS7816 datasheet mentions on page 8 that the input capacitor is 25pF.

Mike

0 yoshiki hasebe over 7 years ago in reply to Michael Stout

Mastermind 6385 points

Hello　Mike-san,

Thank you for your reply.

I will answer to my customer your suggestion.

Best Regards,

Y.Hasebe

0 yoshiki hasebe over 7 years ago in reply to yoshiki hasebe

Mastermind 6385 points

Hello Mike-san,

My customer asked us additional question.

When Vcc of ADS7816 is in operation, it becomes 5v ⇒ 3.1V.
Is there a possibility of falling to 3.1V?
In that case, what is the condition?

Best Regards,

Y.Hasebe

0 Michael Stout over 7 years ago in reply to yoshiki hasebe

TI__Genius 16890 points

Hello,

The device is specified to work with a Vcc between 4.5V and 5.25V. It most likely will not work if the Vcc is at 3.1V.

Mike

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ADS7816: Internal equivalent circuit of the ADS7816