PGA302: Enob measurement

Part Number: PGA302

hello, to determiner the ENOB item 3. states "Connect 5-KΩ, Zero TC bridge to the pressure input pins device with near zero differential voltage"

Can four 5K resistors configured as a bridge be substituted?

thanks

over 5 years ago

0 Scott Cummins over 5 years ago

TI__Mastermind 31655 points

Hello,

The key is just that the differential input voltage is near zero. This can be done a number of ways, including using four 5k resistors. The easiest way would be to just use two 5K resistors as a voltage divider. Take the output of the divider and connect it to both the VINPP and VINPN pins. That way there will be 0V differentially.

Regards,

0 jw over 5 years ago in reply to Scott Cummins

Expert 1190 points

What is the maximum I2C clk rate, I did not find it in the data sheet?

thanks

0 Scott Cummins over 5 years ago in reply to jw

TI__Mastermind 31655 points

Hello,

The maximum speed is 800Kbps (1.6Mhz).

Regards,

0 jw over 5 years ago in reply to Scott Cummins

Expert 1190 points

hello Scott what is the recommend values for pull up resistors for the I2C bus

0 Scott Cummins over 5 years ago in reply to jw

TI__Mastermind 31655 points

Hello JW,

10k pullups are recommended.

Regards,

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PGA302: Enob measurement