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ADS1210: Possible Subsitute for ADS1210P or ADS1210U

HARDIK MEHTA
Prodigy 10 points

Part Number: ADS1210

We have been using ADS1210P in our systems for past 20 years. We changed our boards to use ADS1210U last year. Now come to find out that ADS1210U is obsolete too. Is there is a direct subsitute for ADS1210U?

Anybody going through the same problem?

  • 0
    TI__Guru** 113765 points

    Hi Hardik,

    Welcome to the E2E forum!  It would be nice if ICs could continue on for many years.  The ADS1210 is been out for over 20 years and it appears that you were one of the early adopters to the part.  There are other customers that are in the same situation as you.  The device has not yet gone obsolete but is currently in a last time buy where devices are still available for purchase but will be made totally obsolete in the not too distant future.  I would recommend purchasing the number of units needed to get you to a point where you can redesign your system.  Painful I know.

    Part of the problem that TI faces is that equipment suppliers for fabrication of these older devices are no longer producing fabrication components for these older wafer fabrication systems.  In essence we face similar issues as you in that the maintenance/repair items can no longer be purchased.  At some point TI can no longer make the devices reliably.

    The closest thing still active is the ADS1211 which is the muxed input version of the ADS1210.  However, it may not be long until this device will be in a last time buy situation as well.  I would suggest looking at some newer ADCs to see if you can find one that fits your needs.  If you post back your specific requirements I can suggest some alternatives.

    Best regards,

    Bob B

  • 0 in reply to Bob Benjamin
    Prodigy 10 points

    Hello Bob,

    Thank you for your quick reply. Currently we use ADS1210 as a part of data acquisition module for reading Analog sensors such as Load cells, Pressure Sensors and Deformation sensors. We use Max309, PGA204 in conjuction with ADS1210. Our module has 4 connections so we can read 4 sensors at a time.

    We program the microcontroller so it can be used with our software. Since this system was designed by someone else and he is no longer working the company anymore, I will need to do some digging for some more specific requirements. 

    I hope this is enough for some suggestions. 

    Again thank you for the input. 

  • 0 in reply to HARDIK MEHTA
    TI__Guru** 113765 points

    Hi Hardik,

    You could take a look at the ADS124S08 or ADS1261.  Both of these devices have an internal mux and gain up to 128 which may eliminate the need for the external mux and PGA.

    Best regards,

    Bob B

  • 0 in reply to Bob Benjamin
    Prodigy 10 points

    Hi Bob

    Thank you for the reply. So one of the requirement we have is our analog sensor needs 10V excitation. Output from our Deformation Sensor is in the range of 0-10V, other sensors 0-100mV. 

    Reading at the datasheet of ADS124S08 looks like max excitation is 5V. Am I reading the datasheet correct?

    Hardik M

  • 0 in reply to HARDIK MEHTA
    TI__Guru** 113765 points

    Hi Hardik,

    There are a couple of ways in dealing with this type of 10V input.  If the sensor output is low impedance, then you could just use a voltage divider to the ADC input.  Another option would be to use an INA/opamp to level shift the signal.  One device that could be used is the PGA280 with the output combined with an external mux for the other input channels.  The PGA280 is often paired with the ADS1259. Or you could use an ADC such as the ADS125H02 which accepts a higher input voltage, but this device only has 2 differential inputs so would require an external mux for additional inputs.  So there are many possible combinations.

    If you are happy with the current PGA/Mux solution you could consider using the ADS1259 as the ADC.

    Best regards,

    Bob B