DAC43608: Reference Input Impedance

Art Mecina

Part Number: DAC43608

Hello Guys,

Good day.

Our customer wants to know the minimum and maximum values of the Reference Input Impedance of DAC43608 when all channels are powered on since only the typical value of 12.5Kohms was specified on the datasheet. If there is no specific values, do you know how much this typical value will deviate, 5%, 10%?

Also, what is the input impedance of this pin at power-down state?

Datasheet: http://www.ti.com/lit/ds/symlink/dac43608.pdf

Thanks in advance!

Art

over 4 years ago

0 Kevin Duke over 4 years ago

TI__Mastermind 46290 points

Art,

We will need to check in on this with our design team in India. Given that this is Friday afternoon, it'll be a Monday response.

0 Art Mecina over 4 years ago in reply to Kevin Duke

TI__Genius 16505 points

Hello Kevin,

Acknowledge and thanks!

Art

0 Akhilesh K over 4 years ago in reply to Art Mecina

TI__Mastermind 18546 points

Hello Art,

We have a correction in the typical values, its 24Kohms and you can expect a variation of 10% - 15% across conditions. Will be updating datasheet to reflect the same.

In power down state, it will be very high since we are disconnecting reference pin from internal nodes.

Akhilesh K

0 Art Mecina over 4 years ago in reply to Akhilesh K

TI__Genius 16505 points

Hello Akhilesh K,

Thanks for the confirmation. This is a valuable input.

Art

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DAC43608: Reference Input Impedance