TMP468: serial resistance cancellation

Zhou Fang67

Part Number: TMP468

Hi Expert,

May I know how TMP468 implement serial resistance cancellation? Datasheet only shows results on Figure 8, but no detailed information.

Thanks.

Zhou

over 6 years ago

0 Ren Schackmann over 6 years ago

TI__Mastermind 35895 points

Hi Zhou,

Figure 22 and Figure 23 show how to connect remote junctions and series resistors to the TMP468. Filters comprised of series resistance and differential capacitance are used by many customers, but are not necessary. Customers will have to experiment with different resistance and capacitance values to select their filter if they choose to use one.

Thanks,
Ren

0 Jose Arteaga4 over 6 years ago in reply to Ren Schackmann

TI__Expert 5695 points

Zhou,
In addition to Ren's comment let me comment that the series cancellation scheme performance is clearly shown in figure 8 of the data sheet but more details on the scheme are TI IP.

Regards,
Jose

0 Zhou Fang67 over 6 years ago in reply to Jose Arteaga4

TI__Expert 4250 points

If we test on EVM, can we get results in figure 8?

Thanks.

0 Ren Schackmann over 6 years ago in reply to Zhou Fang67

TI__Mastermind 35895 points

Zhou,
Yes, if you change the resistors on the TMP468EVM, you can get the result shown in Figure 8.

Thanks,
Ren

Sensors

Sensors forum

TMP468: serial resistance cancellation