TLV2553: Design Review Needed

Shyam Thillainathan

Prodigy 150 points

Part Number: TLV2553
Other Parts Discussed in Thread: LM358

Hi,

Need design review of the below design:

All SENSORx_VOLTAGE values are between 0 - 3.3V.

Thanks,

Shyam

over 3 years ago

0 Tom Hendrick over 3 years ago

TI__Guru**** 181041 points

Hi Shyam,

Please take a look at some of our SAR converter training videos here: https://training.ti.com/node/1139106?context=1139747-1140267-1128375-1139106

Depending on the speed of your I/O clock to the TLV2553, you may need to include an R/C ahead of the inputs you show using the LM358 shown in your schematic. Adding a driver to the input channels 6-10 may also be required. Beyond that, make sure you have a good ground connection to REF- and GND. Also make sure you have the bypass and 10uF bulk capacitor close to pins 20 and 14 respective.

0 Shyam Thillainathan over 3 years ago in reply to Tom Hendrick

Prodigy 150 points

Hi Tom,

Thank you so much for the feedback. We are not planning to use high spped for the SPI CLK (IO Clock), and we have buffers for pins 6-10 also, any other concerns you think with the design?

0 Tom Hendrick over 3 years ago in reply to Shyam Thillainathan

TI__Guru**** 181041 points

Just to keep the input traces as short as possible, and keep the reference clean. Feel free to send over the layout when you are ready to move to copper and we'll review that for you as well.

0 Shyam Thillainathan over 3 years ago in reply to Tom Hendrick

Prodigy 150 points

Hi Tom,

Sure, will send the layout as soon as available for review. Thank you so much for the quick turn around.

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TLV2553: Design Review Needed