Other Parts Discussed in Thread: LMH6504 , TINA-TI , LMH6505
To Whom It Concerns,
The LMH6504 output oscillated when the input is near threshold. I built a bread board with the LMH6504device and the supply rails are +vc at +5 and -vc at -5v and decoupled…
Hello Samir,
Something like :
Bias(150V)->Photodiode (Cd=15pF) -> Resistance of 50Ohm between photodiode_anode and GND. A OPA861 connected to the photodiode_anode and a R1/R2 on the OPA861 to be able to lower the current. R1/R2 is configurable. …
Otherwise I don't know of any VGAs that have almost zero gain as part of the range. Something like the LMH6502 has a pretty wide gain range (linear in dB). The LMH6503 is linear in V/V and the LMH6504 is another option.
http://www.national.com/ds…