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TPSM53602: Is TPSM53602 ideal for ADC circuits?

Guilherme Augusto
Prodigy 170 points
Part Number: TPSM53602
Other Parts Discussed in Thread: ADS1235, , ADS1261, LMR33630

Hello

I'm working on a project for a load cell data acquisition using the ADS1235 for data reading. In this scenario i have only the input voltage of 24VDC, then i need to generate a 5V and a 3.3V for powering the circuit and the load cell (AVCC / DVCC). I'm searching for the best solution for a high quality power supply, with the lowest levels of noises and EMI. I found the TPSM53602 witch is a general propose power supply with several advantages, but i couldn't find any application or examples on ADC circuits. I'd like to know if it's a good solution. My plan is to use two of these. One for 5 and 3.3 V.

  • 0
    Prodigy 170 points

    Even if it's a valid solution, i'd like to know about some alternatives with better cost benefit for ADC power Supply from a 24VDC source, once that TPSM53602 is a little expensive.

  • 0 in reply to Guilherme Augusto
    TI__Genius 10655 points

    Hello Guilherme,

    Thank you for your question.

    It sounds like you need a converter to step down 24VDC down to a 5V and 3.3V rail, do you have an idea of the expected current consumption of each of these rails? With an idea of the current consumption requirement, I can offer you some alternative devices.

    I don't think we have any application notes about powering ADC applications with this device specifically, however the EVM User Guide for the device is a good resource for example circuits using the ADS1261 instead of the ADS1235, I've provided the link below.

    https://www.ti.com/lit/ug/sbau293a/sbau293a.pdf

    Regards,

    Harrison Overturf

  • 0 in reply to Guilherme Augusto
    TI__Mastermind 28020 points

    Hi Guilherme,

    The TPSM53602 would be a good device for your application. The power module devices are typically low noise and low EMI. Other benefits of the power modules are high power density, great thermal performance, integrated inductor (less design work) and a validated design. 

    However, as Harrison mentioned, we have plenty of other ICs that you can design your own supply. Internal to the TPSM53602 is the LMR33630.

    Additionally, you can use our Webench Power Designer tool to select the device that fits your application.

    https://webench.ti.com/power-designer/switching-regulator?powerSupply=0