TPS65987D: I2C address for I2C1 port

K.Yaita

Part Number: TPS65987D

Hi Team,

The datasheet shows "Short ADCIN2 to LDO_3V3" to set I2C UNIQUE ADDRESS[3:1] = 011b.

On the other hand, TPS65987EVM schematic shows the following resistor divider (10k/100k) for ADCIN2 as the following.

Which do you recommend to set I2C UNIQUE ADDRESS[3:1] = 011b?
The background of the question is my customer designed their board which ADCIN2 is pull-up to LDO_3V3 through 1kΩ resistor, however a few boards coudn't access I2C1 as expected.

Best Regards,
Yaita

over 5 years ago

0 Eric Beljaars over 5 years ago

TI__Mastermind 36751 points

Hi Yaita-san,

Please download the latest version of the datasheet, it is recommended to use a resistor divider on these pins to help filter noise on the ADCIN pins. Please use a 10k/100k like what is on the EVM.

Thank you,
Eric

0 K.Yaita over 5 years ago in reply to Eric Beljaars

Guru 29710 points

Hi Eric-san,

I already saw the latest version of the datasheet..
http://www.ti.com/jp/lit/ds/symlink/tps65987d.pdf

The datasheet shows "Short ADCIN2 to LDO_3V3" as the following.

Best Regards,
Yaita

0 Eric Beljaars over 5 years ago in reply to K.Yaita

TI__Mastermind 36751 points

Hi Yaita-san,

Apologies, we are still in the process of updating this. I would recommend using a resistor divider on the ADCIN pins.

Thanks,
Eric

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TPS65987D: I2C address for I2C1 port