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20 bit adc
Related Posts

  • Forum Post: problem with ADC1230REF AND THREE WIRE LOAD CELLS

    Bilal Ahmad
    hi, i my doing work on digital weight machine.in this i m facing problem in connecting four load cells to 20 bit adc (ADC1230REF )....... i m not getting any idea of load cell. bec its resistance does not varies as i inserted force on it.. kindly help me out .... i have attached the images of load...
    on Aug 26, 2009

  • Forum Post: Re: DDC EVM Channel Differences

    Jason Bridgmon
    Hello Drake, A good test to verify it is not something to do with the input is to put the device into test-mode by setting the TEST pin high and collecting data. If you still see radically different A side-B side matching data, then you can look to the reference or supply or something systemic...
    on May 6, 2010

  • Forum Post: Re: DDC EVM Channel Differences

    Jason Bridgmon
    Drake, We did some ballpark measurements on an EVM for a newer DDC product EVM and found trace capacitance to be from 9pF to 11.5pF. I would expect the DDC114 EVM traces would be similar. There is a document on the DDC112 EVM kit from 2000 that goes into some detail about how to lay out traces...
    on May 6, 2010

  • Forum Post: ADS1230 interfacing 8052 microcontroller

    ajith kumar
    Hello Sir, First, Thanks for your great support and quick response. 1) Actually i get the initial counts by applying 20 clock pulses(without any load on the load cell).And i store this counts in a variable(h_count).This counts is always a positive binary numbers.But in rare cases i observed that...
    on Jun 25, 2012

  • Forum Post: ADS1230 interfacing 8052 Microcontroller

    ajith kumar
    Dear Sir, I interfaced ADS1230 with 8051.Its working fine,for the load cells 10kg,20kg,50kg......100kg.When connecting these load cells the internal counts(initial ADC counts without load) of the ADC will remains in positive,so there is no problem to calibrate and also it shows the exact weight. ...
    on Jun 23, 2012

  • Forum Post: ADS1230 interfacing 8052 Microcontroller

    ajith kumar
    Dear Bob, I introduced new PCB(double sided) for interfacing ADS1230 and 8052 microcontroller for weighing purpose.I used the hand soldering method to solder the sample PCB,s.I also checked for short circuit between the IC pins.Seems everything Ok .But after switch ON the ADC board the count is drifting...
    on Jul 2, 2012

  • Forum Post: ADS1230 interfacing 8052

    ajith kumar
    Dear Bob, I need to clarify some doubts regarding the PCB design while using ADS1230.I already designed one and its working,but some times the internal counts are drifting upto 5 -6 counts,and this drifting is reflecting on the external counts.As per your information i separated the Analog supply and...
    on Aug 23, 2012

  • Forum Post: ADS1230 interfacing 8052

    ajith kumar
    Dear Bob, First thanking you for the great support.. I designed a new pcb and i need to clarify one important issue regarding Analog Ground and Digital ground. In my new design i separated the AGND and DGND into two sections...So my doubt is, is there any necessity to interconnect these two GROUNDS...
    on Sep 4, 2012

  • Forum Post: ADS1230 interfacing 8052

    ajith kumar
    Dear Bob, Thank you for your great suggestion..So I think its good to connect the both ground planes together via a small trace as per your information, Am i right...! And in my design i also connected 3 inductor in series to AVDD, AINP and AINN for filtering purpose.So,is this safe if connecting those...
    on Sep 5, 2012

  • Forum Post: ADS1230 and 8052

    ajith kumar
    Dear Bob, As per your information i provided enough ground plane for analog and digital ground ,and in the analog section , includes the necessary connections including filtering capacitors and inductors.I used the filling plane technique in "Express pcb"(double sided) to place the ground...
    on Sep 11, 2012

  • Forum Post: ADS1230 interfacing 8052

    ajith kumar
    Dear Bob, I need to clarify one doubt regarding ADS1230 interfacing 8052.My board is working fine.It gives stable counts.but in my board there is no Auto zero option.Is this option is necessary...How to implement Auto zero facility...I m expecting your valuable suugestion,......Thanks in advance.....
    on Dec 20, 2012

  • Forum Post: ADS1230 interfacing 8052

    ajith kumar
    Hi Sir, As per your information,pcb layout file has been attached with this mail. L1=100mH L2=100ohm,(resistor) L3=100ohms(resistor) C8,C17,C18,C19=0.1 uF(box type capacitor) Please go through that and give me necessary instruction.I m expecting your valuable reply. Thank you Ajit....
    on Dec 25, 2012

  • Forum Post: ads1230 interfacing 8052

    ajith kumar
    Dear Bob, As per your information,schematic has been attached with this mail.I m facing the following issues : 1) The counts are gradually increasing upto 10 counts within 5 - 6 hours.So this reflects on the weight value.But i observed that, its due to temperature variation inside the weigh scale...
    on Dec 30, 2012

  • Forum Post: ADS1230 interfacing 8052

    ajith kumar
    Dear Bob, Thank you for your reply..I had provided a 0.1uF capacitor,but it is not closer to reference pin(around 1 inch distance).would this affect the adc performance..? Could you please explain, how to perform averaging,Actually i m not doing any averaging.I m directly taking the value after 20...
    on Jan 1, 2013

  • Forum Post: ads1230 interfacing 8052

    ajith kumar
    Hello Sir, My ADC board is working fine,But some of my customers complainted that after power on the weigh scale,the value slightly increased without any weight on the loadcell upto 1 gm for 10kg/1gm scale and 5 gm for 30kg/5gm scale within 1 - 2 hour.So the customer needs to tare after 1 - 2 hour...
    on Dec 24, 2012

  • Forum Post: ads1230 interfacing 8052

    ajith kumar
    Dear Bob, As from your information i tried different averaging techniques for adc.And finally i tried one moving average method it seems fine and easy.It uses floating point.But i need your suggestion to know,that how much efficient it is.My averaging looks like: long mov_avg(void) { ave_data...
    on Jan 25, 2013

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