FAQ

Hello,

I am trying to simulate a DAC interfacing with the AD8138 differential amplifier in LTSpice.

The circuit is based on Figure 7 of MT-019

The model used is the one available from the AD8138 product page and the simulation is the following:

Newbie designer here. I'm trying to design a circuit to interface a 1 Vpp (into 75 ohm) video signal DC-coupled via a AD8138 to a AD9283. I used DiffAmpCalc to design an input stage around the AD8138 (see screenshot). The AD8138 is powered by a +3.3V…

### Q

I download the new version from website and have a try. Seems the value of Rf
is double of the value it should be.
For example, I designed buffer using AD8138, I set gain=1, Rg=200, Rf should be
200, too, but it showed to be 422. Please refer to…

1.单电源VS=5V时，差模失调电压定义为VOS,dm=Vout,dm/2；条件VDIN+=VDIN-=VOCM=0V是否应为2.5V？

2.单电源VS=5V时，共模失调电压定义为VOS,cm=Vout,cm；条件VDIN+=VDIN-=VOCM=0V是否应为2.5V？

3.单电源VS=5V时，VOCM共模抑制比测试条件ΔVOCM=2.5V±1V是否指的是VOCM=1.5V~3.5V？

4.单电源VS=5V时，增益GAIN的测试条件ΔVOCM=2.5V±1V是否指的是VOCM…

• ### AD8138S and output protection diodes

In our instrument we use AD8138S in configuration as depicted below. Unit A is separated from Unit B and the AD8138S are powered from separate power supplies VP_A, VN_A (unit A) and VP_B, VN_B (unit B). The analogue signal is transmitter over the harness…

### A

The diff amps have a propagation delay, which adds a slight negative tilt to
their open-loop phase responses.  To put this in perspective, one nanosecond is
90 degrees…

# Dear Support,

I'm looking for the SEE (Single Event Effects, like SEL, SEU, SET, etc.) values for AD8138S in MeV/mg/cm².

Can you provide these parameters? TID vlaue in krad is not sufficient for analysing within our project.

Thank you,

Best…