vi 相对 SIGREG 的输出为 0-5v。系统电压为24v,如果要实现对地电压为0-5V的缓冲输出,是必须用高电压运放来实现么
Hi Julien,
I concur with you that something strange is going on with the AD8561 Latch functionality. I also see the latch giving up after a certain amount of time!
Here are my simulation files for reference:
AD8651 Latch issue EZ 3_22_22.zip
I saw your…
I got it, thanks. Ad8651 seems to be proper. I need to use high resistance value resistors with the opamp and ad8651 seems to be a fit for that too.
Hi Sampath,
I suggest you can use the AD8651/AD8652 part. AD8651/AD8652 has a bandwidth of 50 MHz at 5V supply, has low noise density of 4.5 nV/√Hz at 100 kHz, has a typical offset voltage of 100 uV and slew rate of 41 V/μs. You can download its datasheet…
Hi Harry ,
Thank you for the information with regards to this issue .
AD8651 has a simulation model have taken this as a reference .
Thanking you
With best regards and wishes
Hi,
My name is charles.
I'd already used the the high speed video amp(AD811 and AD8057)and ultra low input current offset amp(AD549) respectively in my simple I-V converter circuit to get a singnal from PMT(2uA max) with Rf(100Mohm).
Although…
Hi Alexey,
Here are some of FULLY CMOS designed Amplifiers in ADI portfolio.
1. AD8651/AD8652 (50 MHz, Precision, Low Distortion, Low Noise CMOS Amplifiers)
a. 2.7 V to 5.5 V Supply Operation
b. -0.1 V to (+Vs + 0.1 V) Input Voltage Range
c. 30mV…
Jason,
为了获得增益10,乘以400kHz,乘以10-20裕量,我会挑选一个增益带宽为40-80 MHz的运算放大器。
关于噪声,查看AN-940可获取低电压噪声运算放大器表以及低电流噪声
运算放大器表。 由于在大于五的噪声增益下运行,也可以使用非完全补偿放大器
。 因此ADA4637-1、ADA4898-1、AD8651、OP37、AD8022或ADA4897-1将都是不错的选择。
关于您提到的源阻抗,我会关注低电压噪声。
Harry