Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.
Part Number: TIPD104 Other Parts Discussed in Thread: LOG114
Customer is asking if we have solution to measure the current with 100nA or less. The application is to sensing the leakage current in between the special materials.
If we have total solution …
Other Parts Discussed in Thread: INA190 , INA186 , INA240 , TIPD104 , INA326 , TIPD135 , PGA281 Hi,
I am looking for a current sensing amplifier design. TI found many solutions on the TI website. These are my requirement ,
Operating Voltage: 3.3V
Load Description…
Hello Javier,
That is a large range of currents, maybe a programmable/variable gain amplifier might be necessary. The complexity in a TIA design in this specific application stem from the wide range in changes of the capacitance from the FETs as you increase…
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…
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…
Hello Jose,
We do not have an evaluation board for the INA110. Here are 2 TI designs that might be useful for current shunt monitoring.
http://www.ti.com/tool/tipd104
http://www.ti.com/tool/TIPD135
One other possible solution would also be to build…
Hello Raul,
Thanks for posting to the E2E-Amplifiers Forum.
Let me start by saying that you are seeking to measure currents ranging from 1uA to 1A which is a dynamic range of 1 million-to-1. Most amplifiers will swing their output voltage from 50mV…
Hello Hari,
The maximum full-scale linear output ratio I calculated was a quick calculation of Vout_max/Vout_min = 5V/0.05V = 100. This is actually not techincally accurate, but just for comparison. Any voltage output amplifier will have a linear region…
Hey again,
I don't see a problem using the switch with our parts; although, I am not sure if the TPS22959 will be able to withstand the 55A current peaks though. As for the rest of the circuit it seems you have gone with one of the options I proposed…
Hi Ismail,
My appologies - I mis-read your initial post. You wrote micro amps but I read milli amps. As Gerhard suggested, you need some gain. The shunt resistor used with the AMC1200 would ideally be sub-ohms. Large shunts will cause offset and…
