Hi, i would like to know the OP296 input resistance. I was wondering if the OP296 works as a transimpedance amplifier with a 1M feedback resistance (so i need that value). any advice?.
And the same question for ADA4528.
Thanks.
OP296
Production
The OP196 family of CBCMOS operational amplifiers features micropower operation and rail-to-rail input and output ranges.
The extremely low power requirements...
Datasheet
OP296 on Analog.com
OP196
Production
The OP196 family of CBCMOS operational amplifiers features micropower operation and rail-to-rail input and output ranges.
The extremely low power requirements...
Datasheet
OP196 on Analog.com
OP496
Production
The OP196 family of CBCMOS operational amplifiers features micropower operation and rail-to-rail input and output ranges.
The extremely low power requirements...
Datasheet
OP496 on Analog.com
Hi, i would like to know the OP296 input resistance. I was wondering if the OP296 works as a transimpedance amplifier with a 1M feedback resistance (so i need that value). any advice?.
And the same question for ADA4528.
Thanks.
Mateo,
How were you going to use input resistance? It's generally of limited usefulness
and for a voltage follower, the input resistance is bootstrapped by the open loop gain
at that frequency. For error calculations, input bias current can be used.
I would not do a new design with the OP296 which came out in 1995. I would use the next generation,
ADA4096-2.
Harry
Hello,
the worst case input bias current of the OP296 is +-50nA, which you have to add or deduct from the current of your source (a photodiode, for example). Say, your photodiode sources 500nA then you expect 0.5V at the output of your opamp. In a worst case situation you will only get 0.45V or even 0.55V.
The input offset current is not included in the calculation.
Best regards,
Reinhard