Part Number: OPA657 Other Parts Discussed in Thread: OPA818
Hi, I'm using the OPA657 as transimpedance amplifier(TIA), and also reading datasheet of OPA657.
I find it states 'OPA657 has 1.6GHz Gain-Bandwidth Product(GBWP)' and also figures open loop…
Part Number: OPA657 Other Parts Discussed in Thread: OPA357 Hi TIer
My customer want to find a chip which performance like OPA657U and rail to rail because OPA657U is not rail to rail.
Could you give me some suggestion?
Hi Seongjin,
The OPA847 is not intended for a gain that high. However, the OPA818 is a good substitute for the OPA657 because it has a similar performance but just a different pinout. I have attached a TINA schematic so you can compare the output of…
Hi Varun,
Thank you for your interest in the OPA657. Currently the OPA657 in the SOT23 package is out of stock however we are working to restock it soon.
As Michael mentioned, we do have the new generation device OPA818. It is not a drop in replacement…
Hi Follin,
Follin Ju said: - I used Susumu RG2012P-155-B-T5 , it's 0805 footprint. I read somewhere that using 0805 which has smaller terminal parasitic capacitor compared with 0402/0603 to avoid bandwitdh degration. Is it too large? It affect a bit the…
Part Number: OPA657 Other Parts Discussed in Thread: OPA858 Hi,
I'm testing following circuit using OPA657 as TIA.
And I found when detecting small light pulse (gaussian wave), it works well.
But when detecting large pulse, when the OPA657 get saturated…
Part Number: OPA657 I've both simulated and tested a TIA cuicuit using OPA657. this circuit is made for a 30pF PD
simulated result is here
2layer TIA circuit is made ,layout is close to the evaluation board. I make a interface circuit (C1=4.7nF,C2=30pF…
Part Number: OPA657 Hi
I'm considering the TIA design with a feedback T network.
Target gain is around 120dB and BW shall be larger than 1MHz.
I've almost finished it and hope that you will take a review.
BW:
Stability:
And what I want to get…
Part Number: OPA657 Other Parts Discussed in Thread: OPA857 Hi, support team
My customer has the questions as follow:
1. Could you provide OPA657 gain's temperature characteristic (0℃~40℃) ? (drift value across the temperature or graph vs temperature…