Part Number: LMH32404 Tool/software: Hello, in our design LMH32404 drives 100 ohm diff inputs (AC coupled) of ADC AD9083.
Do we need serial resistors at the output lines to match 100 ohm input of the ADC? LMH32404 datasheet and Eval board manual give very…
Part Number: LMH32404 Tool/software: Hello,
I’m considering using the LMH32404 in my design, but there’s a small chance that the input might occasionally experience a high-current signal of up to 500 mA ( into the LMH32404 -direction), lasting…
Part Number: LMH32404 Tool/software: Hello,
What is the maximum capacitance the TIA inside the LMH32404 can tolerate before it becomes unstable? I have a photodiode with a large capacitance (>20pF) that needs to be connected directly to the LMH32404…
Hello Hanlin,
While the LMH32404 can work with photodiodes that source or sink current, the integrated TIA is optimized for photodiodes sinking current.
Please refer to section 7.3.3 about output swing, photodiode configuration, and the VOD pin.
Best…
Hello Ezira,
Sorry for the delay, we are still experimenting in the lab. This type of application probably would not be as simple as in-series capacitors at the input pin without affecting the signal fidelity of the input current. However, this e2e thread…
Hello Ezira,
I apologize for the very long delay in response. You are correct, there shouldn't be an issue with using your photodiode with this device.
The datasheet does show around 1.3pF if you apply a 5V reverse voltage, which is similar to the…
Part Number: LMH32404RHFEVM Other Parts Discussed in Thread: LMH32404 Tool/software: Could you please walk me through the design logic with the 1:1 balun on the output of this eval kit?
The LMH32404 has a differential output impedance of 21 ohms, and…
Part Number: LMH32404 Greetings,
I have conducted a noise simulation for the LMH32404 in LTspice. Please refer to the schematic and results provided below.
The noise results show a significant deviation from the input noise indicated in the datasheet…
Part Number: LMH32404
HI,
For the LMH32404 is it possible to connect VCC to zero volt and GND to -3.3V.
This is in order to amplify input currents that are sourced (not sinked) from the photodetector
Thanks,
Yuval Minster
Applied Materials
