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Hello Kai/Aec,
Thanks for sharing your insights.
Upon removing the capacitors as you indicated, the opamp still running but in extremely hot (measured at 60 degrees C).
Changing opamp to LMH6609, while the power consumption and heat are way down, this…
Hi，Michael,
Thank you for your response.
Use VCA810 to control the waveform amplitude，then drive an high pass filter in the LMH6609（filter cutoff is 300kHz）， then drive an low pass filter in the LMH6609（filter cutoff is 30MHz）.
When VCA810 is at a fixed…
Hi Michael, for the location in the circuit where I intend to replace the EL5131 with the LMH6609 the noise performance is not critical as the signal has been sufficiently amplified. I have tested the LMH6609 in circuit and it does not impact the performance…
Other Parts Discussed in Thread: THS4601 , THS4131 , TIDA-00976 , THS3217 , OPA690 , OPA659 , LMH6609 , TINA-TI Hi all, I am designing a system to sense the current in a loop. The current signal is sinusoidal and has 15MHz frequency. Because the ground noise, I…
Part Number: THS4502 Other Parts Discussed in Thread: LMH6551 , LMH6552 , THS3215 , VCA824 , THS3217 , VCA821 , OPA820 , LMH6609 , OPA690 , OPA847 Hello, I'm using the THS4502 as a Differential Line Driver. Can anyone recommend a Difference Line Receiver that…
I think a voltgage feedback, low noise op amp is better suited for this application. The LMH6629 is very low noise and could be used for the first gain stage. I would try using a gain of 32V/V. After this stage you will have ~160mV of signal. The next…
Other Parts Discussed in Thread: LMH6702 , LMH6609 , LMH6629 Hi,I am confused about the bode plot of the chip LMH6702,why the Y-axis is 1,0,-1,-2,...while the curves have been marked with Av=1,2,4,10? And how to see the bode plot? could you please help explain…
Hello Olivier,
I suspect that your noise is dominated by the inverting input noise current (18.5pA/RtHz for the LMH6702 vs. 2.5pA/RtHz for the OPA847) flowing through your 2.5kohm eq. feedback resistance.
Here is a list of devices with low input noise…
Other Parts Discussed in Thread: LMH6609 , TINA-TI Hi:
I refer to the 2005 App Note "Design of op amp sine wave oscillators" by Ron Mancini and the discussion there on the Bubba oscillator (Fig 9).
Q1: By using a high-speed opamp with sufficiently…
