I'm interested in building an adjustable electronic load as per Figure 6 of the apps note here: http://cds.linear.com/docs/en/application-note/an104f.pdf
Which ADI amplifiers would be the best match to replace the LT1210 and LT1006?
For the LT1006, I think the ADA4638-1 is an excellent part as replacement. ADA4638-1 is a high voltage, high precision, and zero-drift amplifier with rail-to-rail output. It has lower input offset voltage and drift, lower offset current, and higher open-loop gain. ADA4077-2 also has close specifications to LT1006, but comes as a dual.
For the LT1210, ADI currently has no amplifier with a current drive of 1A. However, for this application, I am not sure if A1 needs that much current to drive Q1. AD810 and AD811 are high speed amplifiers with slew rates of 1000V/us and 2500V/us, respectively. They can drive large capacitive loads with some external compensating resistors/capacitors. AD817 and AD825 are both high speed amps with high capacitive load drive, but with lower slew rates.
I hope this helps.
I build this active load :-)
The LT1006 kan be replaced whit any good precision opamp like the ADA4638-1.
Do NOT try to replace the LT1210!
You can have al look @ this website: http://www.circuitsonline.net/forum/view/105032/1/active+load
Klik on the links, and you wil see pictures i made of building this active load.
It needs verry short wiring!
Also the connection to your powersupply needs to be verry short if you do dynamic testing
of your powersupply.
I used a LM10 as a reference generator with a 10 turn pot and a dial to set the current level.
This active load is a beauty for testing powersupply's with fast signals.
Yust order some sampels for the LT1210 @ www.lineair.com
I need your urgent help in understanding the failure of my circuit.
Please find the attached Control Loop which i have used with Mosfet SiE844DF, it worked successfully.
But when i have changed this Fet to SiDR220DP, circuit is failing.
Please help me to tune this circuit, where i am going wrong ?
Kindly help as soon as possible.