Part Number: OPA818 Hi I'm trying to simulate the OPA818 and compare to some ADI Opamps to see which is the best fit for my application. As there are o easily downloadable Pspice models I tried to open in Tina with the plan to export to Pspice. However…
Dear Nick Nauman,
I appreciate your circuit drawing and simulation.
I have something to be concerned as below.
On the first stage with OPA818, the 500f capacitor(C1) was used.
the capacitor I have found is too big to use. it size is 83mm which is not…
Part Number: OPA818 Other Parts Discussed in Thread: LMP7717 , TINA-TI
Dear Engineers,
We want to design a transimpedance amplifier with a gain over 1G V/A, and we also want its bandwidth to be as high as possible. We already know the impact of input capacitance…
Part Number: OPA818 Other Parts Discussed in Thread: TINA-TI , OPA858 Hi ,
I am new to the transimpedance amplifiers. I have a constant current source(1mA) with speed upto 50Mhz. can i use this OPA818 as voltage translation to about 3V, by forcing 3V at…
Part Number: OPA818 Hi Team,
A customer is using the spice model of this device and found something interesting:
As per the image above, the C_C34 has a value of 1F which seems unrealistically large. Could you please check whether this is indeed the correct…
Part Number: OPA818 Other Parts Discussed in Thread: OPA656 , , OPA657 Hi,
I'm trying to understand the principle of the TIA OPAmp selection.
I used tha TIA_Claculator and input the requirements:
( TIA output bandwitdh = 1MHz, Gain resistor = 1.5Mohm…
Hello CSC,
Thank you for bringing this to our attention. I agree with discussion above. Kai pointed out that this value is at 200kHz, but datasheet doesn't explicitly state this for input current noise. This was a mistake; it should say f = 200kHz as…
Part Number: OPA818 During the debugging of OPA818, it was found that the bandwidth could not meet the design specifications, and it was suspected that it was the influence of parasitic capacitance, but I did not know how to eliminate it.
Design the circuit…
Part Number: OPA818 The PSPICE model of the OPA818 appears to be bogus - it does not even have the correct pinout:
I have just recompiled my PSPICE library and it comes up with same incorrect model. This model draws ludicrous quiescent current, has…
Part Number: OPA818 Hi,
We are building a transimpedance amplifier using OP818. The schematics is as following. We don't know how to measure input current noise density. Could you help on it?
Regards,
HL Chen
