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  • TLV320ADC3120: Getting wierd ADC data and DC offset of the INPUT if it is floating.

    Part Number: TLV320ADC3120 Tool/software: I created a small PCB using the TLV320ADC3120. The inputs are set as single ended Input, INX-M tied to GND. SIGNALS: VREF: 2.50V AREF: 1.80V AVDD: 3.37V VDD: 3.41V All seem pretty stable, hence why i did not attach…
    • Answered

  • RE: ADS52J65: ADC RF input impedance question

    Resolved
    This is unbuffered ADC . Datasheet mentions the equivalent input diagram. Here there are 2 switches S and SZ . I think you would be interested in impedance when S=1. So You have to make transistor SZ open. and S transistor should be replaced by corresponding…
    • Answered

  • TMS320F2800156-Q1: What if ADC port has input voltage while VDDIO and VDDA not power on

    Resolved
    Part Number: TMS320F2800156-Q1 Tool/software: Hi We have a solution for High voltage inverter. MCU shares the same ground with HV voltage. The VDDA and VDDIO is from a fly-back power supply. There is a case that the fly-back power supply is not working…
    • Resolved
    • Answered

  • TMS320F280025C: What if ADC input is out of range

    Resolved
    Part Number: TMS320F280025C Tool/software: Hi, I am using 3.3v as internal reference ADC voltage. ADC_setVREF(obj->adcHandle[0], ADC_REFERENCE_INTERNAL, ADC_REFERENCE_3_3V); However when input >3.3v e.g. 4.2v can still be measured as below : …
    • Resolved
    • Answered

  • MSP430I2041: ADC differential input limits.

    Resolved
    Part Number: MSP430I2041 Tool/software: Hi everyone, I would like to ask/confirm what the ΣΔ ADC input voltages limits are. Based on the datasheet, i see that when internal VREF is used (SD24REFS = 1) the differential input range is (as per…
    • Resolved

  • ADC3422: high frequency spurs on ADC input

    Part Number: ADC3422 Tool/software: Hello, we are developing an RF receiver including an I/Q demodulator and a TI ADC3422 converter. Analog I/Q outputs from the demodulator are fed to ADC inputs though a very simple passive network for AC coupling and…

  • TMS320F280049: ADC input resistance

    Part Number: TMS320F280049 Tool/software: Hi Team, My customer wants to sample point 1 voltage. When give 12V input, it should be 3V, but when use ADC sample, it only have 2.7V. Can you tell me why this happened? Do we have ADC equivalent impedance? …

  • PSPICE-FOR-TI: ADC Input Circuit Evaluation for C2000 Real-Time MCUs (using PSPICE-FOR-TI)

    TI Thinks Resolved
    Tool/software: I am simulating this circuit, but I have one question. How do you calculate Tdischarge? www.ti.com/.../spracy9.pdf

  • TMS570LS3137: ADC Input line protection circuit

    TI Thinks Resolved
    Part Number: TMS570LS3137 Tool/software: Does the microcontroller TMS5703137CGWTQEP have any internal protection circuit on the ADC input lines to prevent damage due to high voltage?

  • TMS320F28069: The input circuits for analog ADC input channel.

    TI Thinks Resolved
    Part Number: TMS320F28069 Other Parts Discussed in Thread: ADS8319 Tool/software: Hi Team, My customers want to use TMS320F28069 internal ADC for current signal sampling, however they need to decrease the voltage which is the output from the filter AMP…

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