AD5560
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The AD5560 is a high performance, highly integrated device power supply consisting of programmable force voltages and measure ranges. This part includes...
Datasheet
AD5560 on Analog.com
Hello,
I have some quetions about current clamps AD5560.
1) If i do not use offset (CLH, CLL), it is mean that current range is simmetrical (for example -500 mA to 500 mA)
2) I use current range -25...25 mA, then i set CLH 18,75 mA - measuring value is ~ 21 mA, CLL -18,75 mA -measuring value is ~ -20,6 mA. For other points i have the same offset current (for every current range). Is it correct? How can I set current clamp more accuracy? By using register CLL DAC c, CLL DAC m, CLH DAC c, CLH DAC m?
3) What is the minimum current limit value? + 10% of full-scale current (according with datasheet DUT current can never exceed the programmed clamp limit + 10% of full-scale current)?
Thank you.
Hi Vladimir ALEX,
First of all, I would like to apologize for replying this late and thank you as well for showing interest in AD5560.
Moving on to your first question, may I know what you meant by offset (CLH, CLL)?
For your second question, I've added a screenshot from AD5560 datasheet as a reference.
From here, we can say that the clamp circuit is not that accurate. Since you set CLH = 18.75mA and CLL = -18.75mA and current range to ±25mA, once the current is clamped it is expected to get a value from ±18.75mA (programmed clamp value) up to ±21.25mA (±18.75mA + 10% of FS which is ±2.5mA). You may refer to the table below.
With this, we can conclude that AD5560 still meets what’s in the datasheet. Additionally, there’s a chance to improve the clamp accuracy by using the CLH DAC m, CLH DAC c, CLL DAC m, and CLL DAC c.
Best Regards,
DJ
