Hi Daram,
I posted a reply to your other similar post here:
e2e.ti.com/.../1887014
May be other people can also contribute if they have any ideas?
Regards,
Hooman
Hi Daram,
The LMH7324 offset voltage is +/-9.5mV maximum, which seems to exceed the low values (2.5mV minimum) that you are trying to "digitize". Is that ok in your application?
I'd think that some amplification would be required for your photodiode…
Hi Zhaofei,
Sorry, I did not see your post till now!
The LMH6518 inputs do not generate their own biasing. So, you are correct in that you need to provide the biasing externally.
For the circuit you've shown, you need to add the proper biasing (using…
Hi Abhay,
I forgot to mention.
The Absolute Maximum Ratings table you have shown should not be used to make a determination about operation of the part and the voltage ranges! The entries in that table "indicate limits beyond which damage to the device…
Hi Jacky,
My apologies!
I had an error in my spreadsheet (I had ignored the current flow through R1 when I computed the Vin trip point). I've corrected it below:
LMV7271 Hysterisis Corrected 5_27_16.xlsx
I've confirmed the trip points with TINA…
Hello,
I see the problem with your TINA-TI simulation file that causes the upper circuit waveform to change with whether or not you have the lower circuit on the same simulation file.
You had labelled a node "VG1", which when you copied, and pasted…
Hi,
This application note briefly discusses the difference between the Voltage Feedback (VFB) and Current Feedback (CFB) type Fully Differential Amplifiers (FDA) in terms of their differential input impedances, on pages 3-4 . The LMH6552 is of the CFB…
Hi Markus,
From an operation point of view, only connect power and ground (VCCI, VCCO, VEE) to the channel you are using, and leave the unused channel pins (input, output, power, ground) unconnected. The unused channels will not draw any current and…
Hello Pablo and Lothar,
I see that you are running the LM6171 from 9V single supply (VEE tied to ground). The input common voltage range of the LM6171 (VCM) does not include the VEE (or V-) rail. VCM requires at least 1.3V headroom to V- and to V+. …
Hi Harold,
The LMV793 input capacitance (Figure 40 showing > 15pF) is too high to use that Transimpedance circuit you have identified. Assuming your current source is a photodiode, the input capacitance will be even higher due to the photodiode capacitance…
