Precision Op-Amp Tester

Thread Starter

Bob Erickson

Joined Mar 12, 2010
1
I need to test an AD8044 Op-Amp and would like to know if there are any testers or applications that can test this device. The tests I would like to perform are,
1. -3dB small signal bandwidth with gain=1, Vo<0.5vp-p at +/-5V (50MHz)
2. 0.1dB flatness from 0-12MHz at gain=2, Rl=150ohms at +/-5V
3. Input offset with Rl=2Kohms to 2.5v,at +/-5v (need to measure <2mV)
Any ideas? The less expensive the tester, the better.
 

kdillinger

Joined Jul 26, 2009
141
1. -3dB small signal bandwidth with gain=1, Vo<0.5vp-p at +/-5V (50MHz)
Cheap way: Use an oscilloscope and a signal generator. 2Vpp sinewave, sweep the frequency, and note the frequency where the output drops by 3dB.
Expensive way: VNA!

2. 0.1dB flatness from 0-12MHz at gain=2, Rl=150ohms at +/-5V
VNA. Not cheap!

3. Input offset with Rl=2Kohms to 2.5v,at +/-5v (need to measure <2mV) Any ideas? The less expensive the tester, the better.
You can use a DC servo loop.
 
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