• Is it possible to use voltage attenuator AD8275 for driving 24 bit ADC ADS1220, without adding input Op-amp buffer?

    I want to use AD8275 for attenuating the output from sensors varying from -10V to +10V, before giving to ADC.

    Is AD8275 meant to use only for driving 16 bit successive approximation ADC? Is it possible to use AD8275 for driving 24-bit ADS1220, which…

  • AD7685+AD8275 对标准模拟信号的采样,采样数据不稳定??

    尊敬的ADI 技术人员:

       你们好!最近参考电路笔记CN-0251,设计了一款对标准模拟信号0~10V,4~20ma 进行采样。

    发现采集数据不稳定。模拟前端信号,输入0~10V,通过AD8275缩小0.2倍,提供给AD7685进行采样。

    采集信号通过接口SPI 通过磁隔与MCU相接。采集电路,如附图如下:

        另外,如果在AD8275 与AD7691之间加一缓存器ADA4941-1,

    不知能否改善采样数据误差较大的问题?

    请问,引起数据不稳,是什么原因造成的???

    礼致,

    中国建…

  • 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: cn-0209

    Hi,

    I require an output less than or equal to 3.3V at the output of AD8275.Can I get help regarding the supply voltage and reference voltage that is to be given to AD8275 for this?If I change the reference for AD8275,then I would need to generate this…

  • 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…

  • 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: +/-10V driver for AD7190? differential or single-ended mode?

    Thanks,

    The low input impedance of the AD8275 is indeed worth noting.

    My latest design for this is now:

    1. +/-10V input to AD8221 instrumentation amplifier, G=1. Some other applications could benefit from gain here, set with one resistor.

    2. 3rd order…

  • RE: What is the best way to convert true bipolar inputs to unipolar inputs for ADC ?

    Hi,

    Apologies for the delayed response. We have the AD8275, an ADC driver with G=0.2, that can be used to translate +/-10V signals to a +4V level. The AD8275 datasheet contains ample information on how to drive either a single ended or differential ADC…

  • 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

  • RE: 签个到,送您好礼啦!(获奖名单已公布)

    北京,丰台科技园,我做ATE,关注AD7982、AD7984、AD8275、AD8475