• AD7888 interfacing

    Hi team,

    I am working on a project where I need to interface AD7888 with a micro-controller (I am using MSP430F6736). The MCU has a SPI interface. Could anyone help me out with the steps from where I need to start and what steps do I need to follow?

  • AD7888 interfacing

    Hi team,

    I am working on a project where I need to interface AD7888 with a micro-controller (I am using MSP430F6736).

    The MCU has a SPI interface. Could anyone help me out with the steps from where I need to start and what steps do I need to follow…

  • AD7888: FAQs

    1. What  is the minimum frequency required for for SCLK ? the data sheet specs
    tell me the maximum fsclk = 2 MHz, but I cannot find a spec for minimum fsclk.

    2. What secret is behind the minimum spec for SCLK High Pulse width = 0.4 tsclk
    and for…

  • AD7888 spike problem

    Hi,

    I have a problem using AD7888 with ATmega324PA.

    I am measuring sine voltages f=50Hz, so T= 20ms on 6 channels, 7 and 8 AIN are connected to GND

    SPI frequency is 125kHz and SPI mode is 3.

    What happens is that from time to time I get one spike…

  • Linux driver for ad7888

    I see there is linux kernel driver support for the ad7887, but the very similar ad7888 does not seem to have a driver anywhere.  Can I use the same driver?  Can I read all 8 channels using this driver, since the 7887 is only a 2 channel device?

  • AD7888: Using two 8 bit reads for the SCLK

    How I can read ADC ad7888 data, if I use 8-bit SPI data register
    (microcontroller AVR)?
    May I read data for two 8-bit cycles?

     

    The SCLK for the AD7888 is also used for the internal bit comparisons...
    In order to avoid capacitor droop…
  • 各位工程师,请帮我看看AD7888怎么通道1怎么老是没有数据

    各位工程师,我在做AD7888实验时使用的是单片机控制AD7888的转换。端口定义在P0.0-P0.3。Measure函数就是AD7888的输入和输出函数,函数简单。Main函数就是把转换出来的值给发出来。很简单的测试程序就是出不来。请各位工程师帮忙看下。

    附上程序:

    #include<reg51.h>                   

    #include<intrins.h>

    #define uint unsigned int

    #define uchar unsigned char

    sbit…

  • AD7888采样几路电压(0.8-24V),想用电阻分压,请问多大电阻合适,还需要加跟随器吗?

    想用D7888采样几路电源电压,这几路电压分别为,1.8V,3.3V,24V,想用电阻分压,不知多大电阻合适。原来设计的是1M,实际来看,很不理想。想知道AD7888的输入阻抗有多大?自身是否带跟随器?

  • RE: AD7887 ADC数据采集

    可以参考一下AD7888的示例代码,AD7888与AD7887结构类似

    www.analog.com/media/cn/example-code/ADC/ExampleCode_ADC_AD7888.zip

  • RE: AD7888ARUZ generating spikes on digital output

    Hi Wouter,

         I can see that there is a 100nf capacitor on the ref pin. Can you try changing to larger capacitor value, like 10uf. From your reference circuit, the ADR3440 is the source for the 4.096V and 2.418V reference. right? so the 47k and 82k and…