TIDM-02002: On Chip DAC connected to COMPH Plus

Hitoshi Sugawara

Mastermind 18650 points

Part Number: TIDM-02002

Hi Experts,

TIDM-02002 shows below:

It seems that On Chip DAC is connected to COMPH + terminal.
Could you please let me know how to create the connection?

The TRM shows below:

Thank you for your kind check.
Best regards,
Hitoshi

over 2 years ago

+1 Cody Watkins over 2 years ago

TI__Mastermind 41385 points

Sugawara-San,

This is a mistake in the TIDM-02002 documentation. For F28004x devices the DAC should always connect to the negative input of the COMPH terminal.

Regards,
Cody

0 Hitoshi Sugawara over 2 years ago in reply to Cody Watkins

TI__Mastermind 18650 points

HI Cody,

Thank you for your confirmation.
Understood.
will take care of it.

Best regards,
Hitoshi

0 Cody Watkins over 2 years ago in reply to Hitoshi Sugawara

TI__Mastermind 41385 points

Hitoshi,

I want to make one more clarifying comment: Please note that the comparator output can be inverted. The inverter effectively swaps the + and - terminal behavior. Please see COMPCTL[COMPHINV].

The diagram in TIDM-02002 is wrong as drawn, however F28004x does have the ability to implement a similar function using the CMPSS's inverter.

Regards,
Cody

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TIDM-02002: On Chip DAC connected to COMPH Plus