Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [ibis]

IBIS is the acronym to Input/output Buffer Information Specification. These models are used for simulations.

IBIS models are used for simulation. Most IC vendors provide these models for their IC for free. The models are a plain text files with the current/voltage and voltage /time curves of each pin.

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What software can I use to simulate I.B.I.S. models?

I am trying to simulate a switch (TS5A3154) which is made by Texas Instruments but the only models they have available are ones called IBIS Models. Now I have done a little bit of research and found that it means Input/Output Buffer Information…
MrPhooky
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How can you block the parasitic body diode in digital CMOS I/O IC design?

I've been screwing around with IBIS models lately and came across something that left me scratching my head. First, the generic model structure for the semiconductor portions of an IBIS I/O looks like the following (taken from this article): When…
Ste Kulov
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What exactly are IBIS simulation models? Can I use them like a normal simulation component?

I read a lot about IBIS. "What I understood is that they basically model the input and output voltage and current data based on actual performance instead of describing them through equations like in SPICE. Please correct me if I am wrong. I cannot…
needbrainscratched
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Hspice to Ltspice conversion

Has anyone had any luck converting Hspice or IBIS model files to formats LtSpice can use? Any help much appreciated, thank you!
user156478
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No driver IC on net in Hyperlynx problem

I am getting the 'no driver IC on net' problem in Hyperlynx signal integrity software. Does anyone have any idea bout it? This is my PCB: It has an SMD connector and an AD9767 DAC. I have added the IBIs model to the pins of the DAC. Then I added…
Xavier Gonsalves
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How to measure the I-V characteristic for IBIS-model?

As the IBIS spec says (pg.184) the voltage range for a GND clamp I-V characteristic must be GND-POWER...GND+POWER. For example, if the IC uses a 3.3V power, the lowest I-V characteristic voltage must be a -3.3V. The same lowest voltage must be used…
Arseniy
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What is difference between IBIS model and IBIS-AMI model and what are specific application of these two models?

I am working on PCIe 3.0 compliance testing from signal integrity and power integrity point of view. I would like to understand the difference between IBIS and IBIS-AMI model and which model is good for my simulation? These models are used in…
Anil Pandey
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Alternative IBIS model for receiver

What do you do when you want to simulate a signal (i.e with Hyperlynx) but you can't find the IBIS model of the receiver chip? What parameters do you need? Where can you find them?
Jesus Castane
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How do we simulate the circuits which have processors. Is there any way we can simulate the circuit before going to the pcb manufacturing?

I'm working on a project on which I'm using a snapdragon 410e processor. I'm done with the circuit design since all the data is available online for designing the PCB. But I want to simulate the whole circuits, Is there any way I can simulate these…
Pooja Mishra
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Spartan 6 pin output impedance

I'm trying to decide if the internal programmable output termination (UNTUNED_50) of the spartan XC6SLX45-2CSG324I if sufficient for our design, or an external termination is needed. The traces from the fpga pin (driver) to the IC (receiver) are…
JakobJ
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How to add an S-model of a capacitor to HyperLynx simulation?

I am struggling with the problem described in the title. I have the s-model of a capacitor I incuded in my design (.s2p series model for a capacitor put at the output pins of an IC in an LVDS line). I would like to include it with the nonidealities…
ald1
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Question regarding IBIS models

I have the IBIS models for this SY75603 PCIe clock buffer IC. However, the available IBIS model is only for the SY75603A with 85 Ω outputs; I'm using the SY75603B with 100 Ω outputs. What should I do to get the IBIS model for the 100 Ω output…
user220456
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How to select the model selector for TI IBIS model of DRA725?

Following is the IBIS model selector section for the DRA725 SoC in IBIS file. Currently, I do SI analysis of DRA725 with Mentor HyperLynx SI, Intention is to select the right model selector. What to be selected and what should be the selection…
vt673
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IBIS model of capacitors

I have started the design of a high speed digital design multi-gbps interfaces. I would like to use Altium designer for PCB analysis (signal integrity). But I am wondering if altium uses the IDEAL model of a capacitor for simulation. The…
dopamine
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IBIS Model Characteristic Impedance

I have tried to understand how to match my 50 ohm pcb trace, which is carrying a high-speed data signal, with a digital chip's input pin. The problem is that I don't understand why the calculations explained in this note from Texas Instruments are…
JakobJ
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