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  • LMH6503: LMH6503 works intermittently or not works

    Part Number: LMH6503 Tool/software: Hi, We are trying to set up the circuit as seen in the image. However, the VGA is giving us a lot of issues. The main problem is that the output of the VGA is less than the input. We have tried using both constant…
    • Answered

  • LMH6503: LMH6503 does not have any output voltage

    Resolved
    Part Number: LMH6503 Tool/software: Hello, We are working with an LMH6503. Our goal is to use the VGA for amplitude modulation of a sine wave, but since we have not been able to get it to work in conjunction with our circuit, we have isolated the…
    • Resolved

  • LMH6503: LMH6503 IC temp. rise issue while no input...

    Part Number: LMH6503 Other Parts Discussed in Thread: LM27762 , THS4541 Tool/software: Hi Sir, The customer found the LMH6503 IC will get hot after power on with no input signal! The power supply provides 4.3V as a power source for LMH6503 and…
    • Answered

  • LMH6503: In case IRG is set lower than 1.7mA, what problem will happen?

    Resolved
    Part Number: LMH6503 Tool/software: Hello support team, My customer would like to set IRG lower than 1.7mA. What problem will happen in this case? Background: They observed oscillation when RG=130ohm, RF=130ohm, and VG=-1V with no signal input. Increasing…
    • Resolved

  • 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

  • LMH6503: Single Supply Operation

    Resolved
    Part Number: LMH6503 Hi, Just a question about the LMH6503 and running it in a single supply configuration. On page 22, figure 65 there is a circuit shown for single supply operation. When I duplicate this into TINA TI I am not seeing any gain functioning…
    • Resolved
    • Answered

  • LMH6503: Circuit Input Impedance

    Resolved
    Part Number: LMH6503 Other Parts Discussed in Thread: LMH730033 A question about using the LMH6503 VGA in a high impedance application. In the app note AN-1808 LMH730033 Eval board, this is a circuit listed page two. It is meant as a 50ohm load to the…
    • Resolved
    • Answered

  • LMH6503: +/-5V Vout

    Resolved
    Part Number: LMH6503 Other Parts Discussed in Thread: BUF634A Hi Team, Our customer finds most of the LMH6503 spec suitable for their application requirements, but they need to produce an output of ±5V (VS = ±5V) at 100Ω RL. The datasheet shows the output…
    • Resolved

  • RE: LMH6503: LMH6503 shows diode-like behavior

    Hello Gabor, I am closing this thread due to inactivity, please reply or start a new thread if further support is needed. Thank you, Sima
    • Answered

  • VCA824: VCA824 vs LMH6503

    Resolved
    Part Number: VCA824 Other Parts Discussed in Thread: LMH6503 , , VCA821 , VCA822 , VCA820 Would it be correct to say that the VCA824 is a direct replacement (assuming SOIC 14 pkg) for the LMH6503 VGA? Seems like the VAC824 is just an improved design but…
    • Resolved

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