Hello Jason,
Thanks for the additional information. I have been out of the office and will reply in greater detail early next week. On a couple of side notes, please understand that the noise of a 5kohm resistor is ~9nV/rtHz. Perhaps you'd be interested…
Hello Awal,
You could look at the INA210. You will want a device with the lowest input offset (Vos) as possible. You can also refer to one of these designs as well for more ideas.
TIPD135 - 10uA-100mA, 0.05% Error, High-Side Current Sensing Solution…
Hello Hung,
Please note that TI does not sell "current sensors". However, placing a precision resistor in series with the load current will generate a voltage proportional to the current. This voltage can be amplified and digitized by an ADC.
Here…
Hello Jan,
Another TI Design that may interest you is TIPD129 (http://www.ti.com/tool/tipd129). It is a low-side current sensing solution from 0-1A (requires calibration and the LM7705). You can adjust the sense resistor for your current range. I hope…
Hello Leo,
We do not have other isolation amplifiers with higher input impedances.
However, you can include an amplifier in front of the AMC1200; depending on your input offset requirements have a couple of options:
a) You could use a simple op…
Kuramochi-san, Have you solved your issue? The INA226-Q1 (10uA Ib typical) and INA220-Q1 (20uA Ib typical) would be your best options to satisfy your original requirements. You can additionally find low current measurement (10uA - 100mA) designs with…
Other Parts Discussed in Thread: OPA320 , LM7705 Hello,
I have a question about the this circuit: http://www.ti.com/tool/TIPD129 . We have designed it on our pcb, but due to recent changes our circuit changed from 5V to 3V. This means we have to adapt…
