LTC6268
Recommended for New Designs
The LTC6268/LTC6269 is a single/dual 500MHz FET-input operational amplifier with extremely low input bias current and low input capacitance. It also features...
Datasheet
LTC6268 on Analog.com
LTC6268-10
Recommended for New Designs
The LTC6268-10/LTC6269-10 is a single/dual 4GHz FET-input operational amplifier with extremely low input bias current and low input capacitance. It also...
Datasheet
LTC6268-10 on Analog.com
Hi,
I want to implement a simple peak detector with a precision diode. I am using the LTC6268-10 to implement the >10 MHz precision diode due to its low input capacitance. However, I would like to increase the voltage supply to +-5V. Thus, I am looking for an amplifier with >100 MHz BW, >10 V/us SR, Vdd-Vss >= 10 V, and low input capacitance (comparable to LTC6268-10). Which one should I choose?
Thanks in advance.
Hi,
Thanks for your response.
For some reason, the circuit does not work with an AD8067. Seems pretty unreasonable to me, because the input capacitance of ~1.5 pF does not explain this behavior.
Results:
You can see that the AD8067 implementation does not the peak detection job because all the current flowing through the capacitor is flowing through the negative input of the AD8067. This does not happen with the LTC6268-10. Am I missing something?
Thanks again!
