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Input current measurement (IIL/IIH)
Input current measurement (IIL/IIH)
In this post I will talk about the Input current measurement (IIL and IIH) and propose a solution to measure it.
IIL and IIH
This is the capacity of the chip to absorb the current in input. Maybe you can think it’s not really important because the output technology can drive a current up to 10mA.
That is right in most of the digital chips but it’s not so simple for mixsignal, RF and…
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Continuity test on J750 (3.50.50)
Click here to know how to make a continuity test on J750 (3.50.50)
In this post I will show you how to make a continuity test on J750 with the template. In the first part, I will show you how to make the test with the DPS and in the second with the PMU.
Continuity Test for DPS
For this test I will use the PowerSupply_T template. See below the instance sheet
Example of Instances sheet with continuity test
To edit the template right-click on the name…
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Flow and test instances on J750 (3.50.50)
Click here to know about theflow and the test instances on J750 (3.50.50)
In this post I will show you the basic of the programmation on J750 through the flow and the test instances. I will begin by the test instances and after I will show you the flow.
The Test Instances
The test instances are the main sheet for the tests. In this sheet you have all the definition of the test, that will tell to the tester what to do and what to execute.
Let see an example…
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How to set the level on J750? (3.50.50)
How to set the level on J750? (3.50.50)
In this post I will show you how to set the level sheet on J750 and how to use the DC spec.
Add a signal in the Levels sheet
To add a new signal in the level sheet on J750, you write the name of the signal or signal group in the Pin/Group column.
Write the name of the signal under Pin/Group
The system will automatically create all the lines.
The system will automatically add all…
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How to define timing set on J750? (3.50.50)
How to define timing set on J750? (3.50.50)
On this post I will show you how the timing set sheet works on J750 and the specificity of the J750. I will start by an overview of the different part of the sheet and I will give you an example of settings for a SPI pins.
The Timing set sheet
On this sheet you will define all the timing, you need for the patterns.
Timing mode
There are 2 modes the extended and the normal.
Setting…
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How to set channel and pin on J750? (3.50.50)
How to set channel and pin on J750? (3.50.50)
In this post I will show you how the channel map and the pin map work on J750. I will begin with the pin map, after I show how to set the job file and in a third part I will show you how to set the channel map.
The channel map on J750
On the channel map, you will manage the different package of the chip and the connection to the tester.
In this sheet you will tell to the tester which…
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How to use the DC spec on J750? (3.50.50)
How to use the DC spec on J750? (3.50.50)
In this post I will show you how to use the DC spec on J750. I will give you some advice to work correctly on this sheet.
Overview of the DC spec
You can see below the DC spec:
Overview of the DC spec on J750
Symbol: the name to use on the other sheet to link the setup to the instrument
Selector/name: The name of the selector. It is used on the instance sheet
Selector/Val: The name of…
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How to use the AC spec on J750 ? (3.50.50)
How to use the AC spec on J750 ? (3.50.50)
In this post I will show you how to set the AC spec on J750. I will give you some advice to manage correctly this sheet.
Overview of the AC spec on J750
I will find below the sheet of the AC spec
AC spec sheet on J750
Symbole: Is the name you can use on Level sheet to set the levels
Value: The value of the actual select configuration or select test in the tool bar
Selector / Name: The…
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How to manage different test flow on one test program for J750 ? (3.50.50)
How to manage different test flow on one test program for J750 ?
In this post I will present how to manage different flow on one test program.
Why do you need to have different test flow on one test program?
You can have all in one test program. I recommend this method to maintain only one test program with all your tests. For example, you can have a qualification, wafer test and package test in one test program.
With that you can reuse the different test…
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How to use SVN or GIT on J750? (3.50.50)
How to use SVN or GIT on J750?
In this post I will show you how to use SVN or GIT on a J750.
Constraint on SVN and GIT
To use SVN or GIT you need to have your test program on text files to manage the merge directly on the subversion system.
First you need to use ASCII Utils, it’s an add-on for excel you can find on Teradyne eknowledge. I made a template with the add-on preinstalled I put it below that you can…
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Create a new and open a test program on J750 (3.50.50)
Click here to know how to create a new and open a test program on J750
In this post I will show you how to create and open a test program on J750
Create a new program on J750
To create a new program :
Click on the Start button
Select All Programs
Teradyne IGXL version
Click on New Test Program
Create a teest program on J750
After some times you must have the window below
Windows of a new test program
To finish save it with the name of your project
Open…
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Intermodulation (IMX)
Click here to know about the Intermodulation test (IMX)
In this post I will tell you about the intermodulation test and how to make it.
What is the intermodulation?
In this test, we will capture a signal with a modulation. A modulation is a signal with 2 frequencies, one is the carrier and the second the signal to modulate. In this case we will use a modulation of the amplitude where the carrier is f1 and the signal will be at Δf = f2 – f1.
T…
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Harmonic Distortion (HD)
Click here to know a bout the Harmonic Distortion (HD)
In complement, with the post of last week about the THD I will explain here what is the Harmonic distortion X. To begin I will give you a definition of the HDX test and after I will give you a solution to test it.
The classic HD3
The HD3 is the ratio between the power of the Third harmonic and the power of the fundamental. So you will have an information more precise than the THD. And you…
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Total Harmonic Distortion (THD)
Click here to know about the Total Harmonic Distortion (THD)
In this post I will tell you about the Total Harmonic Distortion (THD). At The begining I will explain what is the THD and in a second part I will give an example of
What is the Total Harmonic Distortion
The THD represent the part of harmonic in the signal, this is used to show the error that a converter introduce. The less is better the converter is.
In the example below you have 5…
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SFDR : Spurious Free Dynamic Range
Click here to know how to make a SFDR test.
In this post I will tells you about the SFDR. I will tell you what is the SFDR and after a solution to calculate it.
The Spurious Free Dynamic Range or SFDR
It is the ratio between the power of the highest harmonic in the signal output to the power of the input signal.
This represent the highest detractor on the distortion of the output signal that gives us the quality of the conversion…
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SNR : Signal to Noise Ratio
Click here to know about the SNR and the calculation
On this post I will explain what is the SNR (signal to noise ratio) and how to calculate it.
The SNR for Signal to noise ratio
The SNR for Signal to Noise ratio give us the information about the quality of the ADC. Bur let me give you more informations about the different noise.
The Noise Floor
The first one is the white noise, it is made by a signal on all the frequencies of the…
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Differential Non-linearity (DNL)
Click here to know how to calculate the Differential Non-linearity (DNL)
In this post I will explain the goal of the Differential non-linearity (DNL) and how to calculate it.
The goals of the differential non-linearity
The differential non-linearity gave the information about the gain of the ADC. More precisely the linearity of the gain through all codes.
How to Calculate the DNL
First of all, you need to generate a ramp with, at least, 2 times the ADC…
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