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ADS131B04-Q1: Is EEPROM necessary for schematic design?

Chase Jeong
Genius 3435 points
Part Number: ADS131B04-Q1

Hello TI experts,

my customer is in design stage for their new product.

they saw that there is an EEPROM in EVM.

and also saw the description below in EVM User's guide.

---

As noted in Section 1, the EVM interfaces with the PHI and communicates with the computer over the USB. There are two devices on the EVM with which the PHI communicates: the ADS131B04-Q1 ADC (over SPI) and the EEPROM (over I 2C). The EEPROM comes pre-programmed with the information required to configure and initialize the ADS131B04-Q1EVM platform. When the hardware is initialized, the EEPROM is no longer used.

---

My question is,

1. Is EEPROM necessary for initializing?

2. if not, can I store the settings for initializing in MCU and use it with SPI interface?

3. and please give me any information about this matter.

Best regards,

Chase

  • 0
    TI__Guru**** 155515 points

    Hi Chase,

    The EEPROM on the ADS131B04-Q1 is only used for our EVM hardware, your customer would not need this device in their end system.

  • 0 in reply to Tom Hendrick
    Genius 3435 points

    Hi Tom,

    Thank you for your reply.

    then my customer can store initialize settings in MCU, and get it back using SPI interface.

    could you confirm this again?

    Best regards,

    Chase

  • 0 in reply to Chase Jeong
    TI__Guru**** 155515 points

    Hi Chase,

    Correct.  The EEPROM only setups up the interface between the PHI and the EVM, your customer's software/initialization routine would be stored in their MCU.

  • 0 in reply to Tom Hendrick
    Genius 3435 points

    Hi Tom,

    This is another questions from my customer.

    they want to make their product without connecting to MCU, just power up the IC and operate immediately.

    1. Do I need to use EEPROM in this situation?

    2. if yes, what pins can I use for EEPROM connection?

    3. can I use the firmware of EEPROM in EVM for initial setup?

    please check this issue. Thanks.

    Best regards,

    Chase

  • 0 in reply to Chase Jeong
    TI__Guru**** 155515 points

    Hi Chase,

    As I've mentioned before, the EEPROM on the ADS131B04 EVM only relates to the PHI - it holds information like the date of manufacturing of the EVM, the PCB name, revision, etc.  The EEPROM does not and cannot control the ADS131B04.  The ADS131B04 cannot act as an SPI controller, it must be driven externally, please review section 8.5.1 in the datasheet.  The answers to your question then are 1) No, 2) N/A and 3) No.