Part Number: OPA3S2859-EP
Hello,
This is my first time posting in this forum. I am attempting to design a high-speed transimpedance amplifier circuit using the schematic provided in the datasheet. However, after assembling all the components, the circuit…
Part Number: OPA3S2859-EP Other Parts Discussed in Thread: OPA3S2859 , OPA859 Hello, What is the input current-noise specification for the OPA3S2859? We were unable to locate it in the datasheet and want to understand it's contribution to the overall system…
Hello Peter,
Great timing on your end! I actually just had my last discussion with the team members I have been working with.
There are two conclusive points of interest for you:
1) You can leave the highest gain setting path un-terminated/no-connect…
Part Number: OPA3S2859-EP Other Parts Discussed in Thread: ADS52J65 , OPA855-Q1 , OPA3S2859 Dear Support team,
While reading through the OPA3S2859-EP datasheet, I did not see specs included for second and third order harmonic distortion (HD2/HD3) and was…
Part Number: OPA3S2859-EP Page 1 of the datasheet shows the OPA3S2850 used as transimpedance amplifier with a photo diode connected at the COM_A input and hence allowing the selection of LO, MID and HI gain by programming the internal switches. So far…
Part Number: OPA3S2859-EP Other Parts Discussed in Thread: OPA3S2859 , TINA-TI Hi,
I have built the board according ref design. 10k, 100k branches work as expected but 1k branch oscillates at 80 MHz.
If I input 500 kHz current I have this signal
thanks…
Part Number: OPA3S2859-EP
Hi,
I have a problem with the OPA3S2859-EP (Programmable Gain Transimpedance Amplifier) device.
The configuration used is the one shown in the figure where: Vin=+5V -Vbias=-5V Supply voltage (VS+ - VS-)= 5V - 0V Output at 50 ohms…
Part Number: OPA3S2859-EP Other Parts Discussed in Thread: TINA-TI Hi
I checked three boards and all behave the same wave:
SEL0 SEL1
0 0 high gain Rfb 100k
0 1 lower gain Rfb 10k
1 0 oscillation Rfb 1k
This is the picture of the output…
Part Number: OPA3S2859-EP Hi, I just got a new board with OPA3S2859-EP. I do not see output on VOUT_A p19 when I put 20mV from 50 Ohm signal generator at 500 kHz I use single pole power supply of 5V. INA+ and INB+ connected to 2.5V with bypass cap. There…
Hi Kuwahara-san,
I have attached a similar query below, where difference between the 3 channels is explained in detail.
https://e2e.ti.com/support/amplifiers-group/amplifiers-internal/f/amplifiers-internal-forum/1429305/opa3s2859-fiberhome-feedback-resistor…
