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  • Forum Post: Guidelines for posting Precision Analog - Data Converter related topics

    Tom Hendrick
    Hi All! Welcome to the Precision Data Converter Forum! This forum supports the analog-to-digital (ADSxxxx) and digital-to-analog (DACxxxx) devices found on www.ti.com in the <=10MSPS categories. When posting to this forum, please try to provide as much information about the problem(s) you are experiencing...
    on Jan 28, 2010

  • Forum Post: Design with ADS 8342

    Akerb
    Hi, Could anyone advise me where to get the simulation model for the ADS 8342 chip or similar bipolar ADC. I used TINA-TI but can't find any ADC simulation there, my goal is to simulate the ADC with several opamps coupled to it. -Akerb
    on Feb 19, 2010

  • Forum Post: Would it be possible and sugjestable to use a 3.3v supply and power the ads1278 with it?

    josh wojnas
    Would it be possible and sugjestable to use a 3.3v supply and power the ads1278 with it? The voltage would be devided and output on vcom then buffered for 1.5v center signal for the baseline. Then the 3.3v could be devided in half for 1.65v for the digital core of the chip. What regulator or...
    on Feb 23, 2010

  • Forum Post: problem I2C with ADS1114/15

    Juan Maria
    hello i am using the ADS1115 converters, but i don't know why my ADS doesn't work. i am using MCU with I2C and two resistor 10K for pull up, the problem is that my ADS don't sent acknowledge and I read always FFFF of conversion. this is the picture of logic analyzer I2C. the addres is...
    on Feb 21, 2010

  • Forum Post: Opendous & I have a open source ads1298 design board & schematic if some engineers can look into the schematic and board and make some sugjestions the open source design should bring a lot of interest.

    josh wojnas
    Opendous & I have a open source ads1298 design board & schematic if some engineers can look into the schematic and board and make some sugjestions the open source design should bring a lot of interest. http://code.google.com/p/opendous/source/browse/trunk/Current_Designs/ADS1298/ADS1298_2Layer_Test...
    on Apr 29, 2010

  • Forum Post: Re: ADS1298 open source design help request & this will assist open source and development & interest in the chip

    josh wojnas
    any sugjestions or problems with the design you noticed? Any of the ground or power at the wrong value etc?
    on May 3, 2010

  • Forum Post: Problems with ADS1278:

    Andrew Dane
    I'm having some trouble getting the ADS1278 to function properly and I was wondering if anyone could give me some advice. In SPI mode with multiple channels powered up and data coming out of D1 in 'dynamic' TDM the output is all garbage. With the same setup and only one channel powered...
    on Jun 16, 2010

  • Forum Post: ADS1298 Configuration problems

    DSP_KungFu_Master
    Hello, I have ADS1298 running inside our product, all signals are acquired perfectly using the following configuration: - High resolution mode, 4kSPS (Config1 byte: 0x83) Now we wan't to switch to low-power mode (16 bit). Anything except the following configuration is not working: - Low...
    on Jul 1, 2010

  • Forum Post: ADS1298 Chip Select (CS), can it be always selected?

    josh wojnas
    ADS1298 Chip Select (CS) can it be always selected? & Start pin can it be used to at system start up to stop multiple conversions and load configuration registers then start multiple converters in sync? It apears in the data sheet CS can stay selected all the time their seems no requirements for...
    on Aug 22, 2010

  • Forum Post: Re: ADS1298 system with Right Leg Driver multiple chips, 1 chip generates reference 3.0v system, High Resolution, 10K samples per second useable

    josh wojnas
    Here is what I have done so far I am making a spread sheet of what the registers are as defalt and what I think should be loaded in eatch of them. . address regester...
    on Aug 25, 2010

  • Forum Post: Re: ADS1298 system with Right Leg Driver multiple chips, 1 chip generates reference 3.0v system, High Resolution, 10K samples per second useable

    josh wojnas
    it seems to have cliped a lot of the info so maby I should make the columns be name, defalt, guess main creates ref v, secondary, defalt read main, defalt read secondary
    on Aug 25, 2010

  • Forum Post: ADS1298 system with Right Leg Driver multiple chips, 1 chip generates reference 3.0v system, High Resolution, 10K samples per second useable

    josh wojnas
    ADS1298 system with Right Leg Driver multiple chips, 1 chip generates reference 3.0v system, High Resolution, 10K samples per second useable... What I am trying to do now is set the registers for the ads1298 by using a xilinx FPGA. I want to set the clk in the fpga to the clk to the ads1298 for...
    on Aug 24, 2010

  • Forum Post: ADS1675REF and ADCPro

    Bob Fleming
    I recently bought an ADS1675REF to evaluate it with some real world data. I was hoping to collect several thousand triggered blocks of data up to about 1/2 second in length at the best resolution and speed possible. Does anyone know if ADCPro can handle triggered data acquisition or would be sufficient...
    on Oct 12, 2010

  • Forum Post: Re: 20 bit resolution without Toggling in ADS1230

    manikandan k
    Hi Bob, Thanks a lot for your feedback. As you mentioned i have implemented Offset Calibration before processing the ADC Read. Regarding my power supply which is constant 5V Ref from TL431for ADC and to my MCU. I have one doubt on my board i have made the single GND for AGND and DGND is it cause the...
    on Nov 8, 2010

  • Forum Post: 20 bit resolution without Toggling in ADS1230

    manikandan k
    Hey All, I am using ADS1230 in weigh application Where i am using Interrupt method to polling the data from ADS1230 and my exitation voltage for ADCis 5V. Here when i am polling the data it is toggling +- 7 counts because of this i could not able to get 1% accuracy. Can some body suggest me what is...
    on Nov 1, 2010

  • Forum Post: Re: TLV2545 optimal layout

    Rafael Ordonez
    Hello MJ, This EVM was designed in 2003, and we currently try to avoid the use of split ground planes. For a while now, we have been designing EVMs that meet datasheets specs using a single ground plane even for converters with higher resolution and speed than the TLV2545. The most critical aspect...
    on Dec 17, 2010

  • Forum Post: Offset Errors and Resolution for Delta-Sigma ADC (16-bit ADS1110)

    Leon Rasberry
    I have several questions on the TI ADS1110 ADC: (1) I am trying to determine if negative offset readings for a single channel are typical for the ADS1110 ADC device. The data in Decimal for 5 channels (starting with 1 in our numbering) is given below: Chan1 Chan2 Chan3 Chan4 Chan5 14968 00015...
    on Jan 4, 2011

  • Forum Post: Re: ADS1248 with k-type thermocouple design review

    Rafael Ordonez
    Hello D, From your schematic, it seems that you might want to use IDACs to bias the thermocouples. This can change the typical non-linear behavior of the thermocouple and give you big errors. Usually the thermocouples are biased with a voltage source in the negative terminal of the thermocouple, so...
    on Jan 6, 2011

  • Forum Post: ACD accuracy (TUE + SINAD)

    Gokul Vardan
    Hi, First time I'm messing with ADC's. I'm trying to find the usable bits of an ADC using the following article as the reference. http://www.analogzone.com/acqt0515.pdf What i don't understand is that how the author converted the TUE 0.1%FSR to 9.97bits(rms). Also as he mentioned in the...
    on Feb 11, 2011

  • Forum Post: TLC2578

    Prabhakar Patil
    Data Sheet: (Please visit the site to view this file) Hi For one of our project design we use TLC2578 to read a analog voltage(10 Volts). We use PIC18F Controller library to interface the device in SPI. The following are connection details to host. Device Pin 1 (SCLK), Pin 3(SDI), Pin...
    on Feb 22, 2011

  • Forum Post: How to debug ADS1230 Amplification

    Jayaraj A
    Dear All, Using ADS1230 for weighing scale; provided 22mV on input w.r.t to Gnd (single ended). DVDD,AVDD & reference+ are shorted and given to 5V and their grounds(ref-) are shorted. Gain & speed are also grounded. PDWN controlled through h/w circuit. The digital count coming out is nearby...
    on Mar 4, 2011

  • Forum Post: Re: ADC over serial (12 bits, 4 input lines)

    Adam V.
    Hi Tom, Thanks kindly for your reply. We've been looking at the TLV2544 closer and you are correct, we need control of /CS and a serial clock. We are using a GumStix microcontroller and unfortunately do not have an option to switch to the MSP430 family. The GumStix has an onboard...
    on Mar 9, 2011

  • Forum Post: ADC over serial (12 bits, 4 input lines)

    Adam V.
    Good afternoon - hopefully this isn't too tricky of a question: We desire a 4-input 12-bit ADC controllable entirely over three-wire serial communication (RxD, TxD, GND): Input voltage will be no greater than 0.7 V. Positive voltage rails available at 1.5 V, 3 V, 4.5 V, and 6 V (tapping...
    on Mar 8, 2011

  • Forum Post: ADS7865 Configuration Register

    Mike Partridge
    Anyone used the ADS7865 with a microcontroller? Having trouble writing the Configuration Register for the device. Although the CSn and WRn seem correct, and the data on the bus seems correct, the values do not get moved to the device. Tried updating the DAC as a way of testing another aspect of the interface...
    on Mar 12, 2011

  • Forum Post: TLV1562 VREFM problem

    daisy70473
    TLV1562 datasheet shows VREFM ranges from -0.3V to0.3V when operating free-air temperature,. At the same time , the datasheet says the minimum of VREFM in the recommended operating conditions is AGND +0.9. HOW can I set VREFM??
    on Mar 31, 2011
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