Doh
Head-Fier
- Joined
- Jun 24, 2001
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posted 10-27-2001 1:02 PM ET (US) | Msg Admin:
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Hey everyone,
Just a quick question about opamp swapping. Is it ok to replace a bipolar opamp with a FET opamp given that the input offset voltage of the FET opamp is equal or lower than the offset voltage of the bipolar opamp?
Here are the specs of the chips I want to swap:
NJM2043(bipolar)
Input offset voltage(typical) 0.3mV
Input offset voltage(max) 3mV
Slew rate: 6 v/uS
AD712 (FET)
Input offset voltage(typical) 0.3mV
Input offset voltage(max) 3/1/1 mV
Slew rate: 20 v/uS
I've gathered that swapping a bipolar for a fet is a sometimes big no-no since the bipolar opamp can create large offset voltages if driving a high impedance load, but don't know if I'll have problems the other way around.
Thanks in advance for all the help!
-Doh
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Hey everyone,
Just a quick question about opamp swapping. Is it ok to replace a bipolar opamp with a FET opamp given that the input offset voltage of the FET opamp is equal or lower than the offset voltage of the bipolar opamp?
Here are the specs of the chips I want to swap:
NJM2043(bipolar)
Input offset voltage(typical) 0.3mV
Input offset voltage(max) 3mV
Slew rate: 6 v/uS
AD712 (FET)
Input offset voltage(typical) 0.3mV
Input offset voltage(max) 3/1/1 mV
Slew rate: 20 v/uS
I've gathered that swapping a bipolar for a fet is a sometimes big no-no since the bipolar opamp can create large offset voltages if driving a high impedance load, but don't know if I'll have problems the other way around.
Thanks in advance for all the help!
-Doh