We would like to use the LTC6268 or LTC6268-10 for a charge-sensitive amplifier application, essentially an integrator with a large resistor in parallel with the feedback cap.
The input signal is an approximately 100ns wide pulse of 10s to 100s of femtocoulombs…
Hi engineer ：
The scheme is as follows:
Then I test the J11 signal.The J10 is not connect anything.
But the waveform is like this.What are wrong.The input or the power?
Then can I use LT3092 to test the TIA circuit.
Connect J3 to TIA's J10.Looking…
I turned to Bandwidth simulation in LTSPICE to use the LTC6268-10, but the result was different from the datasheet.
We want to implement a circuit with a bandwidth of 100MHz or more in the form of a transimpedance amplifier.
The LTC6268-10 datasheet…
You would at least need an amplifier with a THD of -72 dBc at fin= 5 MHz, a much faster op amp would do so. Here are the possible choices: LTC6268/LTC6269, and ADA4857. Take note that ADA4857 runs at 5V and LTC6268/9 can run at 3.3 V. Also, reconsider…
What is the maximum achievable transimpedance gain with LTC6268. I wish to design a TIA to amplify a current pulse whose magnitude is around 100 pA and FWHM (full width half maximum) of the pulse is around 0.2 ms for which the rise time expectation…
Hi kazspore: If the APD has fairly low capacitance, then the LTC6268-10 can be used in applications up to about 400MHz.
We also have dedicated TIA's such as HMC799, with a 1GHz data rate, but the gain is 10k Ohms.
ADA4817 would work but it requires a minimum Vs=5V. The closest fit for your application is LTC6268. Let me know if this works. Also, could you share what your application is?
Unfortunately we only have the evaluation board for LTC6268 family. It is a bare unpopulated board, with 3 channels, all for transimpedance amplifiers, with different layouts for more or less feedback capacitance.
Evaluation board link.Regards,