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…

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

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…

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?