Part Number: INA103 Tool/software: Dear TI_Forum,
I’ve got a problem with a circuit using a INA103KU.
I want to use the INA to measure current from 0 to 50mA in both directions (current from INAs Input+ to Input- and the other way around). The supply…
Part Number: INA103
Tool/software:
Hi,
I am designing an amplifier which get input of 0 to 20V (peak voltage can varry from 2V to 20V) with 2 to 3 MHZ frequency. I want to amplify the input signal to gain of 7.5. so the maximum output on 20V need…
Part Number: INA103 Hi,
I'm trying to build an instrument to measure small inductances as part of a school project. The circuit drives a sine wave through a sense resistor and an unknown inductor. The INA103 amplifiers are used to convert the differential…
Dimitris,
This model was developed a long time ago and it looks like the circuit was created assuming a fixed gain. We are reviewing the model itself to see if it contains necessary information that'll allow gain setting by the user.
Thanks,
J…
Hi Dave,
I think the chip was damaged during the experimenting with it. Take a fresh INA103.
Use allways power supply decoupling caps, experiment only with both supplies permanently connected to the INA103. And insert a 100R resistor in the output…
Part Number: INA103 Other Parts Discussed in Thread: INA110 , INA116 , INA826 , INA111 , , INA217 , INA128 Hello, I am looking for advice for choosing the best amplifier that is to be connected to a Wheatstone Bridge that is supplied with an AC source…
Part Number: INA103 I'm looking to understand how to read the noise spec of the INA103 (and others). It's expressed as e.g. 1 nV/√Hz. Does this signify that at 1MHz, I would expect as much as 1uV (1nV * √1000000) of noise? If so, I'd appreciate recommendations…
Hello Zachary,
To the best of my knowledge, the standard PSpice-based simulators (Cadence, TINA-TI, LTSpice, etc.) require a netlist with its subcircuits defined in unique, contained instances. The first .subckt is understood to be the top level with…
Part Number: INA103 Hello, We've been using the INA103 for 25 years as current sense amplifiers in circuits similar to yours. Assuming you have the reference pin (7) tied to the common ground of your floating power supply and INA103 supply then a suggestion…
Hello Thomas,
Thank you for looking into the problem and making a suggestion. After looking at the data sheet for this unit I have another question. Is there a significant difference between the INA111AP, AU and the INA111BP, BU? If so, which of the…
