Part Number: LMP7721 Also very low bias current.
Goal to measure voltage across a sensing capacitor, displacement of charge.
1 pA bias current or less
Cin 1 pF differential
very low noise
We wish to use this methodology to reduce the Cin
https:…
Other Parts Discussed in Thread: OPA659 Hi!
I have a problem importing the OPA659 spice model into the Multisim part library. When I start a simulation using this part I get the error message "not enough operands for mathematical operator '*'. Expected…
Part Number: LM6172 Other Parts Discussed in Thread: TINA-TI , , OPA659 Team,
Could you please help with LM6172/OPA659 TINA-TI transient output simulation?
I can send the simulation files off-line.
Thanks in advance!
A.
Hello Enrico,
Yes, you are correct. For that input signal, the part will be slew limited, and the output voltage will start looking like a triangular waveform. For a sinusoidal 6VPP signal at 15MHz, you would need an amplifier with a slew rate of around…
Hi Tony,
Pairing the LMH5401 with the OPA659 will work to get you the 4 Vpp output swing that you want. However it was mentioned that the -3 dB BW will be limited to 450MHz because of the OPA659. To terminate the unused output you would use a 100 ohm…
Part Number: OPA659EVM Other Parts Discussed in Thread: OPA659 Due to unstable power supply, PCB (OPA659EVM) overvoltage was applied. I want to test whether the OPA659 and OPA659EVM are normal, and if the PCB is fine but the OP amp (OP659) is broken,…
Part Number: OPA659EVM Other Parts Discussed in Thread: THS4513EVM , OPA659 Hi,
We got project files for OPA659EVM and THS4513EVM from you in our previous post - https://e2e.ti.com/support/amplifiers/f/14/t/884994 . Thank you for your support.
But, the project…
Hello , as the input impedance required is 1Mohm , i would recommend using a CMOS/FET input amplifier like the OPA659,
As i can see you are interested in the 60Mhz for an amplitude of 1Vp i would recommend to look at the large signal BW of the opamp…