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  • RE: AD7918 Latch Up

    EZAdministrator
    EZAdministrator
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …
    • over 3 years ago
    • Precision ADCs
    • Q&A
  • AD7918  读写问题,麻烦各位朋友指导一下,谢谢!

    amao
    amao

    最近用AD7918 和 ARM9 (linux平台)通信,通过SPI 接口,如下SPI写 0x93,0x30 配置寄存器选择AD转换的通道。但是通过read 函数读回来的数据并不是 对应通道的数据。(数据像是随机的)

    问题1 . 再写控制寄存器时,DOUT 上输出的是什么数据? 如下图 黄色 输入配置,蓝色DOUT输出。

    问题2.  输出的后端波形异常。上升沿很缓慢,电路上已经上拉到3.3V 。怎么会出现这个情况?

    麻烦知道朋友指导,谢谢!

    • Answered
    • over 4 years ago
    • 精密转换器专区
    • 问答
  • RE: ad7928读写控制问题

    ADIApproved
    ADIApproved

    您好!

    不能正常读到数据请先检查硬件设计,看硬件设计是否正确,硬件设计请参考附件内AD7928评估板原理图。确保硬件设计正确后,请检查焊接是否正常,通常虚焊或短路会导致芯片状态不正常。

    对于软件部分的检查,首先应保证初始化流程与数据手册中流程要求一致。在数字读写时,则应保证读写时序遵守数据手册中时序图。

    • 30978230EVAL_AD7908_AD7918_AD7928.pdf
    • over 8 years ago
    • 精密转换器专区
    • 问答
  • RE: How to choose Reference for ADC

    JakubS
    JakubS

    Hi Tarzan,

    The AD7918 device can be operated with 2.5 V +/-1% reference only. Such restriction is driven  by the internal comparator in the part which starts to operate outisde its normal operating region when the reference is not withing datasheet limits…

    • over 10 years ago
    • Precision ADCs
    • Q&A
  • TAGS LIST: Precision DACs

    lallison
    lallison
    AD7380
    AD7381
    AD4111
    AD4112
    AD7768-1
    AD4002
    AD4006
    AD4010
    AD5144A
    LTC2353-16
    AD4008
    LTC2357-16
    LTC2357-18
    AD4007
    AD4011
    AD4020
    AD7616-P
    …
    • over 1 year ago
    • Precision DACs
    • Documents
  • TAGS LIST: Precision ADCs

    emassa
    emassa
    AD7380
    AD7381
    AD4111
    AD4112
    AD7768-1
    AD4002
    AD4006
    AD4010
    LTC2353-16
    AD4008
    LTC2357-16
    LTC2357-18
    AD4007
    AD4011
    AD4020
    AD7616-P
    AD7617
    …
    • over 1 year ago
    • Precision ADCs
    • Documents
  • RE: AD7357 how to check the DC Accuracy in worst case condition

    jcolao
    jcolao

    Hi Kevin,

    I have attached some list of ADC that were Automotive Qualified. Do you have specific paramater that you are looking for an ADC? like Throughput rate, no. of channels, or Resolution.

    You can also visit the Analog Devices website and filter…

    • ADIParametricSearch.xls
    • over 8 years ago
    • Precision ADCs
    • Q&A
  • TAGS LIST: Data Converters

    karinasmith
    karinasmith
    AD693
    AD5410
    AD5412
    AD5420
    AD5422
    AD5735
    AD5755
    AD5755-1
    AD5737
    AD5757
    AD5421
    AD421
    AD5758
    AD7569
    AD7669
    AD7868
    AD7869
    AD5593R
    AD5592R
    AD5940
    AD5941
    AD7293
    AD7294-2
    AD7292
    AD5590
    AD7294
    L…
    • over 3 years ago
    • Data Converters
    • Documents
 
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