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  • VCA820: Non-linear issue of VCA820

    Part Number: VCA820 Hi team, I want to use this device as below, Rf=845Ohm, Rg=16.9, Vg=2V, which means Avmax=40dB; When I apply VG1 signal, Vpp=5mV, f=20MHz, we can see that Vpp of VF1 is about 700mV. This is not aligned with the gain*Vpp=500mV. What…
    • Answered

  • VCA820: Can VCA820 operated using single supply 10 VDC

    Resolved
    Part Number: VCA820 I am looking for a VGA 10MHz , with -10 to +10 db gain operating with a single supply and single ended. Can VCA820 b e used with single power supply 10VDC? or can you suggest an alternative part number
    • 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

  • RE: VCA810: AGC 500KHZ

    Hello Amy, I have not forgotten about getting a good explanation to you; I am working with my manager to best understand how to communicate the selection of AGC parameters. While I am working on this, please see this thread for more information: https…
    • Answered

  • RE: LMH6505: AGC circuits at V+/V- = 7V/0V

    Resolved
    Hello Hirano-San, The input signal into the LMH6505 would be within range; however, there might be an issue into the following stages (within the AGC loop control) due to the DC offset cancellation. I am looking into this a bit more. Also, we have other…

  • VCA820 Gain settling time

    Other Parts Discussed in Thread: VCA820 , TINA-TI Dear all My customer is evaluating VCA820, they will provide a high frequency voltage(around 30MHz or even higher) to VCA820, so they want to know how long it will take for the VCA820 to change its gain…

  • RE: VCA810: VCA810

    Hi Wael, your input signal range is way too large for a simple AGC circuit. I think you will need two cascaded VCA820 with additional signal dampening to do the job: wael_vca820.TSC R1/R10 and R11/R12 attenuate the input signal to provide input stage…

  • LMH6503: LMH6503

    TI Thinks Resolved
    Part Number: LMH6503 Other Parts Discussed in Thread: VCA822 , VCA820 , VCA824 Hello, on page 19 of LMH6503 daatasheet, Figure 61 shows how to adjust (on pin 12) the output offset of the LMH6503 IC. Can this adjustment be useful to adjust the offset from…
    • Answered

  • VCA820 / VCA821 VCTRL0 and VSLOPE

    Resolved
    Other Parts Discussed in Thread: VCA821 , VCA820 , VCA822 , VCA824 Hallo, I have a question. What are VCTRL0 and VSLOPE in the VCA820 / VCA821 datasheet and Figure7 of the VCA821 datasheet? The VCA822 / VCA824 have not these specs. Are these specs for the gain…
    • Resolved

  • VCA820 and VCA822 Gain Adjust Voltage

    Other Parts Discussed in Thread: VCA822 , LMH6505 , VCA820 , OPA820 What happens with the VCA820 or VCA822 if the Gain Control (Vg) voltage falls out of the normal operating range of 0V to 2V (For VCA820) and -1V to 1V (For VCA822)? The LMH6505 warns against…

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