
2stage tia
aewallin/Photodetector_2stage_OPA818
Measurement data overlaid with TIASim predictions show a parasitic feedback-capacitance of ca 0.15-0.17 pF when no Cf (C126 in shematic) capacitor is installed.

The OPA657U is an operational Amplifier made by Texas Instruments in a SOIC-8 package with 8 pins. -40℃~+85℃ -6V~6V 1 1.6GHz 12uV/℃ 14mA 250uV 2pA 4.8nV/√Hz@100kHz 5nA 700V/us 70mA 89dB 8V~12V Decompensated stable、ESD Protection SOIC-8 FET Input Amplifiers ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:OPA657U, from EasyEDA) and its footprint (Package_SO:SOIC-8_3.9x4.9mm_P1.27mm, from KiCad's library), ready for a KiCad board. 27 are in stock at JLCPCB (part C2878144). 6 open-source boards in 6 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | NC | Unspecified |
| 2 | VIN– | Unspecified |
| 3 | VIN+ | Unspecified |
| 4 | -VS | Unspecified |
| 5 | NC | Unspecified |
| 6 | VOUT | Unspecified |
| 7 | +VS | Unspecified |
| 8 | NC | Unspecified |

aewallin/Photodetector_2stage_OPA818
Measurement data overlaid with TIASim predictions show a parasitic feedback-capacitance of ca 0.15-0.17 pF when no Cf (C126 in shematic) capacitor is installed.

slactjohnson/l2si-mods-emeter-board
Repository for the L2SI Laser MODS system energy meter diagnostic PCB.


slactjohnson/l2si-mods-quadcell-board
Repository for design files related to the L2SI MODS quad cell PCB.

svenclawdbot-ai/acoustic-research
Multi-frequency shear wave elastography research

jayis1/hardware-design-lab
Full-cycle hardware device designs — each device in its own subfolder with architecture, schematics, PCB layout, and software stack
<iframe src="https://pcbkit.io/embed/parts/ti/OPA657U" title="OPA657U in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/ti/OPA657U.jpg" alt="OPA657U" width="1200" height="900">[](https://pcbkit.io/parts/ti/OPA657U)Yes. The symbol is EasyEDA_Cloud:OPA657U and the footprint Package_SO:SOIC-8_3.9x4.9mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOIC-8, with 8 pins. Its footprint is drawn on this page.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C2878144, with 27 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the TS922IDT by STMicroelectronics, the LMV358B-SR by 3PEAK, the MC33178D by onsemi and the BUF634AID by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
6 boards in 6 repositories on GitHub; the most starred are listed on this page, with their KiCad files.