• AD8428 AD8275 SPICE model ?

    Pls send the AD8428 & AD8275 SPICE model to me.

    Thanks.

    Message was edited by: Andy Rose - Removed personal email address.

  • AD8275 vs. common voltage divider for signal attenuation?

    Hi guys.  This is a question from rookie-ville, so pardon me if I'm posting a seemingly obvious question.

    I'm working on a circuit that will consist of multiple, identical channels, with each using the AD8250 as a front end.  Directly after the…

  • AD7091R-4BCPZ设计问题

    使用AD8275AD7091R-4BCPZ-RL7设计4ADC采集电路上报给CPLD

    1.在测量0~10V输入时,AD8275ref1ref2GNDAD7091Rref2.048V

    2.在测量-12V~+12V输入时,AD8275ref1ref22.5VAD7091Rref5Vref191更换为ref195

    问题:

    1.使用1ref192是否可以满足4AD8275的参考电压的电流需求?

    2.AD7091Rmuxout直连ADCinPCB布线上是否有屏蔽要求…

  • RE: Current shunt negative voltage and negative low current

    Hi F. Buonomo,

    Please check this great article for the different current sense topologies and some information on the consideration and how to use them. I think the one shown on Figure 1 d is a good approach.

    With regards to the parts, please have a look…

  • RE: 寻找单端输入±15V的ADC驱动器

    使用简单方法,还使用AD8275方案,在AD8275的输入端2、3脚,各串一个25k电阻,可以把±15V的电压转换为单端输出给后级的ADC

    当然可能25k电阻不好找,那就找个24.9k的电阻吧,这两个电阻一定要匹配哦

    这个方法不一定可行,那位大神给说一下,这样可行吗?

    安全的方法:

    输入信号采用电阻分压,使用三个电阻串联,AD8275从中间电阻取样,阻值分配如:2.49k  10k  2.49k

  • AD7091R使用咨询

    使用AD8275和AD7091R-4BCPZ-RL7设计4路ADC采集电路上报给CPLD

    1.在测量0~10V输入时,AD8275的ref1和ref2接GND,AD7091R的ref接2.048V

    2.在测量-12V~+12V输入时,AD8275的ref1和ref2接2.5V,AD7091R的ref接5V(ref191更换为ref195)

    问题:

    1.使用1片ref192是否可以满足4片AD8275的参考电压的电流需求?

    2.AD7091R的muxout直连ADCin在PCB布线上是否有屏蔽要求…

  • Composite amplifier using ADA4637-1 and ADA4870-1

    I want to build a composite amplifier using the Figure 77 of the datasheet ADA4870-1. It says that the voltage offset is less than 500 uV. I simulate this circuit using LTSpice, when driving ada4637-1 with 0V and monitor the output of ADA4870-1, it is…

  • RE: 仪表放大器选型:输入差分电压+-30V,单电源运放3.3V,请推荐一款仪表放大器

    可以先用漏斗放大器做衰减,将+/-30V信号压缩至ADC可以处理的范围(0, Vref) or (-Vref, +Vref).

    http://www.analog.com/cn/products/ad8275.html

    然后可以参考下CN0225之类实验室电路

    CN0225 参考电路 | 亚德诺半导体

    cn0225-00-1024.gif?h=500&thn=1&hash=B71C6E650D2CF5071501A788A99548B9D0CDD786

  • RE: cn0209 bipolar unipolar

    Hi Francis,

    The CN0209 can accept up to ±10V signals, there is no need to change any settings in the AD7193 for different ranges.

    The output of the AD8275 should be 4.5V/2 = 2.25V for a 0V input. For a -10V input the gain of the AD8275 is 0.2, so the…

  • RE: 放大器当衰减器的使用设计

    AD8475, AD8275是增益小于1的,前者为差分输出,后者为单端输出。或者可以用运放搭反向电路,增益可以小于1.