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ADS131M04-Q1: ADS131M04-Q1

Ankush
Intellectual 490 points
Part Number: ADS131M04-Q1
Other Parts Discussed in Thread: RM48L540, , HALCOGEN, ADS131M04

Tool/software:

Dear Team,

I am working on the RM48L540 and trying to interface it with the ADS131M04-Q1 IC for ADC conversion. However, in the data register I am only getting 0x000000 (24-bit) data.

I suspect this issue is due to the CLKIN pin, which I have currently tied to ground in the design. Could you please advise whether there is a solution for this, or if I must connect an external crystal or provide a clock from the MCU?

In HALCoGen, I found that the PWM output frequency cannot go beyond 100 kHz, but as per the datasheet the ADS131M04 requires a clock between 2 MHz and 16 MHz . Could you please guide me on how to achieve this clock requirement with the RM48L540?

Your support on this matter would be highly appreciated.

Best regards,
Ankush Tiwari

  • 0
    TI__Mastermind 45315 points

    Hi Ankush,

    As you can see the details in the section of 8.3.5 Clocking and Power Modes in ADS131M04-Q1 datasheet, an LVCMOS clock must be provided at the CLKIN pin continuously when the ADS131M04-Q1 is running in normal operation, so you can use either an external oscillator or a clock from your microcontroller. Depending on the power mode, you can select and use a clock of 8.192MHz, 4.096MHz or 2.048MHz frequency. For any other frequency clock, you may not be able to get an output data rate specified in the table 8-2 in ADS131M04-Q1 datasheet. The output data rate is determined by CLOCK/(2*OSR).

    If you have any question about RM48L540, please post your query on TI Arm-based microcontroller forum.

    BR,

    Dale

  • 0 in reply to Dale Li
    Intellectual 490 points

    Thanks for the information .