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  • VCA824: about the linearity of the VCA824 gain

    Part Number: VCA824 Tool/software: Hello, I would like to inquire about the linearity of the gain of VCA824. Through simulation and actual testing, I have found that the relationship curve between the gain and control voltage of VCA824 is not perfectly…
    • Answered

  • VCA824: Where is PSpice model for VCA824?

    Resolved
    Part Number: VCA824 Other Parts Discussed in Thread: VCA820 Tool/software: I can't find PSpice models for VCA824 or VCA820. What's really strange is that I downloaded the model for VCA820 2 weeks ago - it was linked on the product page, but now it's gone…
    • Resolved

  • VCA824: VCA824 and VCA820 don't appear on VGA/PGA product page right now. Why not?

    TI Thinks Resolved
    Part Number: VCA824 Other Parts Discussed in Thread: VCA820 , Tool/software: When I navigate to the PGA/VGA page https://www.ti.com/amplifier-circuit/pga-vga/products.html I don't see VCA820 or VCA 824 anymore (they were there last week). Why not…
    • Answered

  • VCA824: Fully differential summing amplifier

    Resolved
    Part Number: VCA824 Other Parts Discussed in Thread: LMH6554 , TINA-TI Tool/software: Hello, I designed a fully differential summing amplifier using the VCA824. Based on the values of Rg ​ and Rf ​ , I expect a gain of 5. However, the simulation results…
    • Resolved

  • VCA824: Too much offset in output of single-ended amp

    Part Number: VCA824 Tool/software: Simulation (in LTSpice, sorry) of my VCA824-based circuit showed DC offset that increases with gain. I think that's the model trying to represent the input offset chip-chip variation. I thought I could live with the…

  • VCA824: When importing the Pspice model of the VCA824 into the ADS, there is no 14-pin model

    TI Thinks Resolved
    Part Number: VCA824 Other Parts Discussed in Thread: TINA-TI I need a VCA824 model with 14 pins, but when importing the Pspice model of the VCA824 into ADS, this model is not in the options，please tell me why？
    • Answered

  • VCA824: Thermal information

    Resolved
    Part Number: VCA824 Hi, I would like to ask you about "Thermal resistance" of VCA824ID(SO-14). According to the datasheet 4page( would like to ask7.4 Thermal information), ΘJA=90.3 ℃/W. But there describes "80℃/W" to calculate the Tj at the datasheet…
    • Resolved

  • VCA824: ACG (automatic gain control) reference circuit for MIC audio signal

    TI Thinks Resolved
    Part Number: VCA824 Other Parts Discussed in Thread: VCA820 Hi Team, Does this part have any ACG (automatic gain control) reference circuit for MIC application? Thanks. Best Regards, Tess Chen
    • Answered

  • VCA824: Max Quiescent Current

    Resolved
    Part Number: VCA824 Hi, Let me confirm the value of "Max Iq". There described the value is 38.5mA (Ta=-40℃ to 85℃) on the datasheet page6. This value means at totally +/-5Vcc, not separate +Vcc/-Vcc, that is to say, 38.5mA/+5Vcc and 38.5mA/-5Vcc…
    • Resolved
    • Answered

  • VCA824: Basic question

    Resolved
    Part Number: VCA824 Hi, I would like to ask you a basic question about the circuit of Fig76, datasheet 29page. There are 2 input registers in the circuit, R2/R3. I think that the input registance of VCA824 is set by the registers. Will you tell…
    • Resolved

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