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THS4521: THS4521

ASWATHY VV
Prodigy 130 points
Part Number: THS4521


please find my design ICs forREVIEW_SHEET_PDF.pdf review. Kindly update the same

  • 0
    Guru 140200 points

    Hi Aswathy,

    can you please be so kind and tell some words about your circuit and your application?

    Kai

  • 0
    Prodigy 130 points

    Hai,

    Please go through the description for the designs.

    1. OPA333AIDBVR-THS4281DBVR => THE DESIGN USING THESE OP AMPS IS TO GENERATE A REFERNCE VOLTAGE FOR THE ADC "ADS8881IDGS". THE INPUT VOLTAGE IS SET TO 5.5V TO THE OP AMP ANAD HAS TO GENERAT A ADC_REF VOLTAGE OF 4.5V ACCORDING TO THE DATASHEETS.

    2. OPA4354AIPWR => IT IS AN CHARGE AMPLIFIER HAVING INPUT OF 5VSUPPLY.

    3. SN74LVC2G07DBVR => THIS IC IS A LEVEL TRANSLATOR . KINDLY CHECK THE RESISTOR VALUES AND CONNECTIONS.

    4.THS4521IDGKT => IT IS AN ADC DRIVER IC HAVING A SINGLE SUPPLY OF 5V.

    5. TPL0501-100DCNR => IT IS A DIGIPOT OF 100KOHM TO CONTROL THE GAIN.

    6. TPS7A4701RGWR => LDO POWER IC WITH 24.5V INPUT AND OUTPUT IS 24V @1A.

    7.TPS79133DBVREP => LDO 5V TO 3.3V @100MA

    8.TPS79650DRBR => LDO 5.5V TO 5V @1A

    @Ray Vincent Aranzaso

  • 0 in reply to ASWATHY VV
    TI__Mastermind 29700 points

    Hello Ray,

      I reviewed the amplifier connections, and they are correct. For THS4521, the ADC Driver, the amplifier is driving a large capacitor (10nF). This causes instability without isolation resistors of at least 10 Ohms. I would suggest either decreasing the capacitor to pF range, or place 10Ohm or greater series resistors before the capacitive load. You will have to adjust the gain of the THS4521 according to achieve unity overall gain of the system.

    Thank you,

    Sima