### Q

I don't find any statement about the input protection of the AD8541/2/4 opamp,
but in the datasheet of the AD8603 it is mentioned that the
inputs should be protected by resistors that keep input currents below 5 mA if
the input voltage…

Hello. It is possible to use AD8541/2/4 if the input voltage greater than the supply voltage with external clamping diodes and a current limiting resistor?

I want to use it for EEG/ECG amplifier: exactly AD8542 - one op-amp for getting reference voltage (Vmid)- for a voltage follower in…

• ### AD8541 Large Signal Voltage Gain 's Vs dependency

Hi

Regarding about Large Signal Voltage Gain

Avo= 100V/mV @ Vs=2.7V, 3.0V

but Avo=20V/mV @ Vs=5.0V

Load is 100Kohm, so these are not a big difference, I think.

Could I see the "Avo vs Vs" feature?

Regard…

PS：本帖讨论中如果有一些错误和模棱两可的地方，还请大侠们指正。小弟虚心接受，一起讨论。

1、运放供电。

single-supply Operation：2.7V to 5.5V，根据自己所需要的电路供电电压和输出电压…

1. I-V放大器的放大倍数是如何计算的，倍数就等于Rf的值吗？等同这里的10M  ？

2. 如果是这样，那么设计的带宽范围很窄了，一般OP的单位增益带宽是10M的很大了，这样带宽几乎就1HZ了< 根据  f = 1/ (2pi R C)  >，如果是？ 有什么方法可以改善带宽问题，谢谢

3. 在互阻放大器中，PIN二极管的有多种，一种正极接地，一种是负极接电源，如图中。这两者有什么区别？

Hi ,

Does anyone know if there is any Evaluation Board that has AD8541 + AD1972 on board?

• ### RE: Transimpedance Amplifier (Photodiode interface)

Rookie,

There is nothing "wrong" with the AD8541 family.  We split op amps into a precision group,

(less than 1 mV Vos, and less than 50 MHz) and a high speed group. (greater than 50 MHz).

The AD8541 family has some historical reasons why…

• ### RE: Can OPAMP unused pins left open?

My understanding was input offset voltage was too low like 0.1mV

Where did you get this value from? In datasheet of AD8541/8542/8544  says that offset voltage equal 1mV typically

I have already said what needs to be done. You should limit…