Part Number: OPA2189
Hello Team,
Recently I'm looking for OPA2189 device which has excellent noise, offset and drift spec. I noticed out that the internal block of this device is pretty different from other OPAMP device. This device including two clocks and three transconductance amplifier. What is the purpose of the internal clock? Is this device free for clock noise? Could you please briefly explain about how internal blocks are operating?
Thanks.
You can read more about the zero-drift topology in this TI Tech Note:
The basic zero-drift, chopper amplifier when stripped of the switching and filter circuits still has the basic analog topology of the traditional operational amplifier designs. You can see the similarity between them in the following slide. The chopper diagram is a bit simplified, but is still representative of the circuits.
Regards, Thomas
Precision Amplifiers Applications Engineering
