DRV2510-Q1: Absolute MAximum Rating of INTZ pin

YUN LIN

Intellectual 535 points

Part Number: DRV2510-Q1

Hi teams,

Could anyone teach us whether the 5.0V power supply is used to pulling up the INTZ pin.

It seems no detailed information about that from date sheet.

Best regards,

Yun Lin.

over 5 years ago

0 Luis Fernando Rodriguez S. over 5 years ago

TI__Guru* 84915 points

Hi, Yun,

Thank you for pointing this out. Effectively, there is no mention of the INTZ usage in the datasheet. We will work to correct this.

As you correctly mentioned, the INTZ can be pulled up to 5V (6.5V max). A 47Kohms resistor is typically recommended for this.

Please let me know if you have additional questions or comments.

Best regards,
Luis Fernando Rodríguez S.

0 YUN LIN over 5 years ago in reply to Luis Fernando Rodriguez S.

Intellectual 535 points

Hi Luis,

Can I have a more question about the absolute maximum.

From the datasheet, the I2C port must be used up to 5.0V.

While, the REG voltage are 6.9V typically.

I wonder why the voltage of upper limit of I2C port is not equal with the REG voltage.

And, what is the REG voltage used for?

Best regards,

Yun Lin

0 Luis Fernando Rodriguez S. over 5 years ago in reply to YUN LIN

TI__Guru* 84915 points

Hi, Yun,

The REG pin voltage is used as self bias for the analog input stage. It basically sets the common-mode input voltage.

The I2C port and REG pin are different blocks in the circuit and work with different voltage levels. The REG pin is a regulator output while the I2C pins are part of the digital stage of the circuit. Their maximum values are independent from each other.

Best regards,
Luis Fernando Rodríguez S.

0 YUN LIN over 5 years ago in reply to Luis Fernando Rodriguez S.

Intellectual 535 points

Hi, Luis,

From the Table7. in the datasheet of DRV2510, the resistor used as pull up resistor for

INTZ, is 100Kohms. Why that is different from your recommend.

By the way, if we want to set the other pull up resistor for EN, STBY, I2C_DATA, I2C_CLK,

which one (of 47K and 100K) do we can use?

Best regards.

Yun Lin.

0 Luis Fernando Rodriguez S. over 5 years ago in reply to YUN LIN

TI__Guru* 84915 points

Hi, Yun,

The resistor selection depends of many factors in the board. 47K resistor is a typical value that is used to get the electrical characteristics data of the INTZ pin ( http://www.ti.com/lit/ds/symlink/drv2510-q1.pdf#page=6 ). However, 100K resistor is recommended for cases where it is pulled up to higher voltage >5V.

In case of the I2C pins, I would recommend to select the pull up resistors as mentioned in the document below:

http://www.ti.com/lit/an/slva689/slva689.pdf

Best regards,
Luis Fernando Rodríguez S.

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DRV2510-Q1: Absolute MAximum Rating of INTZ pin