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Original question:

DAC53701: Asking for DAC53701 output suggestions

DAC53701: PWM Generation using DAC53701

SWADESH PRAKASH
Prodigy 40 points
Part Number: DAC53701
Other Parts Discussed in Thread: DAC53202, DAC539G2-Q1

Hi 

There are two queries: 
1. Can DAC53701 generate by default waveform of 2 KH with 50% duty cycle by resistance setting only once it is powered on and not any command is there over I2C? 
2. Can we adjust the Frequency/ Duty cycle by sending command over the I2C?

  • 0
    TI__Mastermind 35758 points

    Hello, 

    1. You can configure the waveform type and frequency and save this in the non-volatile memory (NVM). To achieve 50% duty cycle on startup you need to make sure the voltage connected to the DAC53701 FB pin is set to the proper voltage on startup. 

    2. You could consider using a device like the DAC53202 to set the output duty cycle over I2C. The configuration will be similar to this functional block diagram from the DAC539G2-Q1 datasheet:

    You can control the second channel of the DAC53202 over I2C\.

    Best,

    Katlynne Jones