We have LTC6269-10 IC as TIA in one of our electro optic circuits followed by a high speed LTC6754 comparator we want to do Signal integrity analysis on the design but unable to because of un availability of spice and ibis models of mentioned ICs
Re…
LTC6269 should now be back. Let me know if you run into any issues.
Hi Vilashini,
It appears from the LTC6269 datasheet front page that two parallel 40k feedback resistors get you into the vicinity of the femto-Farad compensation capacitance you need:
From the front page datasheet: "*TWO 40.2kΩ 0603 PACKAGE RESISTORS IN…
输入端的失调电压和噪声，都会随着增益倍数而放大，所以需要重点关注运放输入端的误差，同时降低比例电阻的阻值，在反馈电阻下面铺地，以降低寄生电容。
另外就是你需要关注输入信号的源阻抗，源阻抗决定了你可以选择同相放大或者反相放大器，如果是反相放大器，可以通过在外部接入超低失调电压的运放做积分器来屏蔽掉LTC6269的失调电压。
Hi Chris,
As checked, you have used +/-12V supply for the ADA4530.
This exceeds the Abs Max supply for this part. Any result is not guaranteed and may permanently damaged your amplifier.
Please try to lessen the supply first and let's check the response…
thank you. I used LTSPICE XVII to try different filter arrangements, and can try LT1568 as suggested. Is "8th order" referring to 8 identical sections in the context of a filter chain? I ask as I just studied a sample schematic, and duplicated…
I acquired a neat pulse now by adding matching Cf, but how can explore my LTC6269-10, because all my sensor boards are equipped with them i need to change all ICs on the board to LTC6269
but if this kind of problems are there with these opamps in saturation…
One of our application circuit involves below stages
Photo diode > TIA(LTC6269)>OPA699(Inverter with G=10)>LTC6754(LVDS Out)
I want the soution to be arround complete Analog/LT ICs,i am also finding heat problems with OPA699
Kindly suggest…
Hi,
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…
