Part Number: LMP7718 Other Parts Discussed in Thread: THS4032
Hi There,
I am trying to amplify a sine wave signal of order of 40mv peak to peak. The signal oscillates from 1.57V to 1.61V so its not at absolute zero potential when going down. The gain…
Part Number: LMP7718 Other Parts Discussed in Thread: OPA320 , LMP7717 I need something close to a 1 Mhz TIA for interfacing to a photodiode. It has to work indoors and outdoors, so I'm looking at DC coupled, but including an additional op amp that will…
Part Number: LMP7718 Other Parts Discussed in Thread: TINA-TI Hi everybody, I am currently designing a high gain transimpedance amplifier to amplify the signal of a pyroelectric sensor. Already read stuff like tidu535. I chose the LMP7718 mainly because…
Part Number: LMP7721 Other Parts Discussed in Thread: TINA-TI , LMP7718 I could find some model like TINA spice model for this LMP7721, but I could not find anything compatible with HSPICE.
How can I find HSPICE compatible model (subcircuit) for this…
Another way to think about your required BW is how many spectral components of the Input fourier series do you want to pass. The input here is 50kHz, it mainly has odd harmonics, so if you want to pass the first 4 odd harmonics you need have a flat response…
Thanks, that is good info.
To create this "50kohm" gain, it is still perplexing how do deal with your voltage source through an R source. Not really a current source, is the voltage unknown or the R unknown, and that is what you are trying measure?…
Well Kwok,
1. Normally for transimpedance, you choose a decomp device 1st of all to get an input noise voltage advantage since you are going to comp the ckt to higher noise gain at unity gain LG crossover anyway.
2. Your total input noise current…
Thank you Michael. I am concerned about the limited slew rate of LMP7718; if I'm targeting a 1Vp-p output, the 11.5V/us would limit transitions to 87ns (11.5MHz).
Regarding the VFA, this is interesting. The ADC dev board I'm using has an analog input…
Other Parts Discussed in Thread: TPS54620 , LMP7718 I have an adjustable constant current LED driver design based on the TPS54620 DC-DC switcher. I've prototyped the circuit, and I'm finding it to be unstable at low output currents and when the input…
