I am trying to make a transimpedance amplifier using the LMH6629 Opamp. I use a Universal Precision Op Amp Evaluation Board in SOT-23 Package. Its manufacturer number is EVAL-PRAOPAMP-1RJZ. The transimpedance amplifier is to amplify a laser signal with 10MHz Frequency modulation. However; in the data **** it is said that the board is not suitable for high speed amplifiers and high frequency components. I am not sure if 10MHz is a high speed for this board because it seems that the frequency response is OK for 1MHz. Can someone help me with that?
I try to use this Opamp to make a inverting amplifier first. However, when I just connect the Vee, Vcc and the output(without the input), I saw strong oscillation on the oscilloscope. I have tried 2200 microF and 0.1 microF by bypass capacitors. The 2200 microF capacitors can kind of reduce the oscillation ; however, it is still quite an amount of oscillation there. Can someone tell me if that is the problem of the evaluation board?
1. The UG-755 is the user guide for generic board for some of our High Speed Amplifier products. Actually, the board in UG-755 has a part number EVAL-HSOPAMP-1RZ, it caters HS products such as AD8099, AD8010, AD8011, etc. Please see the link provided for more information. I ordered that board a month ago and successfully got one, but it has to come from Singapore. You can coordinate with your local distributor to help you acquire this board faster. It's a bare board and the good thing is that you can play with the part anyway you like to function as well as you can use it for other High Speed Amplifiers.
2. If you are going to purchase for AD8099 boards that cater LFCSP package, the boards are built to cater specific configurations. AD8099ACPI-EBZ for inverting and AD8099ACPN-EBZ for non-inverting. Now, it's up to you on which board to order as long as it suits your need.
I hope this helps.