前段时间在得捷上购买了AD8253ARMZ仪表放大器，并按照“AD8253-EVALZ-UG-928”板，搭建了测试电路，并进行了测试发现结果与手册中描述有些不一致。

测试条件：

1、信号源：福禄克5720A

2、采集系统：NI PXIe-1065

3、采集卡：NI PXI6123

4、测试信号：10Hz~20KHz  4.5mvpp~4.5Vpp

测试结果发现增益与频率的关系趋势与数据手册中图23一致，但是带宽达不到图中给的效果，特别是在信号频率为20KHz时，每个增益下都会比图中给的下降点提前衰减…

Dear Sir, please help me

I'd like to work with AD8253 in LTspice simulator.

I uploaded "cir" file and I can open this text file in the program  LTspice. But I don’t understand what to do next with this text file. I'd like to draw…

How fast does the AD8253 settle after it is overdriven?

I use the AD8253 in a system that switches between small signals // high gain and large signals // small gain.  If I accidentally have a large signal // large gain, for example, 10V input while…

hi,

I used ad8253 instrumentation amplifier.I require following points are about ad8253

1.output voltage formula of ad8253 with using ref terminal

2.here "ref terminal " purpose

Hi, 

I use ADIsimPE to simulate AD8253. From the datasheet, the input current should be <50nA. However, from simulation I see ~8uA current goes into the amplifier. I'm wondering is it realistic? How come a CMOS opmap has such large input current?…

Hi,

I am attempting to use the AD825x devices as current sense and voltage sense instrumentation amplifiers in an analog control loop. I was unable to get the SPICE models for the AD825x to work with PSpice and LTSpice. While the circuit simulation was…

I am currently designing a breakout board for this amp and would like some suggestions on input protection.

My input is a piezo sensor(reverse speaker, home made, non powered) that puts out about 70mV full swing and no clue on the amps.

The data sheet…

麻烦问一下，我的两个AD8253出现增益控制不准确问题。

第一路的问题是：1、10、100都可以，但是1000时和1一样了？

第二路的问题是：1和100增益一样，增益为1倍。10和1000增益一样，增益为10倍

两路的电路一样，两路差分信号直接输入，直接输出。。。。。。求救C_imustanalogchina-adminhdx2FormerMemberAnalog1

This is the reference circuit about the AD8253 and AD7985.

There are differencial input ports in the AD8253 and I want to use this device for single input.

Then how can I connet the other input pin?

Hi,

I wonder if it's enough for AD8253/AD8251/AD8250 to output ±10V when it is supplied with a power of ±12V ?

Thanks.