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ADS1258 QFN Socket

Daniel Vamos
Genius 3950 points
Other Parts Discussed in Thread: ADS1258

Dear TI!

I am looking for QFN Socket adapter for prototyping ADS1258. Could you offer me a good one that can I use to connect jumper wires? 

Thank you in advance and any suggestion welcome,

  • 0
    TI__Mastermind 44550 points

    Hi Daniel,

    Are you looking for a protoboard? (Here is a link to a socket, but I don't think that is what you need).

    There is the ADS1258EVM that has headers to connect to most of the ADS1258 pins. Other than the EVM, I don't know of any other resources offered by TI.

    You could search for boards like this one: http://www.aprilog.com/images/48QFN20-D6-SMT-S.jpg

    The ADS1258 is a 48-pin QFN with 0.5mm pitch. Here is the mechanical data: http://www-s.ti.com/sc/psheets/mpqf140c/mpqf140c.pdf

    Regards,
    Chris

  • 0 in reply to Christopher Hall
    Genius 3950 points

    Dear Chris,

    You are very helpful. Thank you for your answer.  Actually my problem is a little bit more complicated. If you don't mind let me write it down here, and if its required I'm gonna start a new thread for that.

    What I would like to achieve a solution that can be found in the ADS1258 datasheet page 45. / Figure 68 Bridge Input Single Supply Operation. 

    I have already tested the ADS1258EVM and work very well also the SPI communication thanks to your support. Now I would like make the next step and make a prototype board as Figure 68 shows without amplification. 

    I have already had a QFN socket and also the ADS1258 that fits into. At first I would like to establish the SPI communication and later I will focus on the precision ADC.

    Somehow I can not communicate with the device.(When I start this post I supposed that the problem could be the socked, but it seems it is OK.)

    My code works well with the ADS1258EVM but fails with my hardware.

    Created a table where you can see the PIN and connections. These pins are connected directly to my MCU via jumper wires.

    I have common ground for Analog and Digital signals.

    1

    AIN3

     

     

    AIN4

     

    48

    2

    AIN2

     

     

    AIN5

     

    47

    3

    AIN1

     

     

    AIN6

     

    46

    4

    AIN0

     

     

    AIN7

     

    45

    5

    AVSS

    GND

     

    MUXOUTP

     

    44

    6

    AVDD

    5V

     

    MUXOUTN

     

    43

    7

    PLLCAP

     

     

    ADCINP

     

    42

    8

    XTAL1

     

     

    ADCINN

     

    41

    9

    XTAL2

     

     

    AIN8

     

    40

    10

    PWDN

    3,3V

     

    AIN9

     

    39

    11

    RESET

    3,3V

     

    AIN10

     

    38

    12

    CLKSEL

    GND

     

    AIN11

     

    37

    13

    CLKIO

     

     

    AIN12

     

    36

    14

    GPIO-0

     

     

    AIN13

     

    35

    15

    GPIO-1

     

     

    AIN14

     

    34

    16

    GPIO-2

     

     

    AIN15

     

    33

    17

    GPIO-3

     

     

    AINCOM

     

    32

    18

    GPIO-4

     

     

    VREFP

     

    31

    19

    GPIO-5

     

     

    VREFN

     

    30

    20

    GPIO-6

     

     

    DGND

    GND

    29

    21

    GPIO-7

     

     

    DVDD

    3,3V

    28

    22

    SCLK

    P9

    SCK

    CS

    P6

    27

    23

    DIN

    P7

    MOSI

    START

    GND

    26

    24

    DOUT

    P8

    MISO

    DRDY

    P3

    25

     Is there anything else that I need to tie high or low?

    Looking forward your reply! 

  • 0 in reply to Daniel Vamos
    Genius 3950 points

    OK, I got it. I forgot the pin the XTAL and PLLCAP inputs. :) 

    Thank you!

  • 0 in reply to Daniel Vamos
    TI__Mastermind 44550 points

    Hi Daniel,

    Good find!

    Let me know if you have any other questions.

    Best Regards,
    Chris