• RE: AD7779 MEMMAP_CRC_ERR Error

    Hi Lluis

    Thank you for your reply.

    I verify that the ODR properly set. The frequency of DRDY signal is 500 Hz.

    The SRC_LOAD_UPDATE bit has been cleared, but MEMMAP_CRC_ERR still occurs.

    All other functions except MEMMAP_CRC_ERR seem normal.

    The output…

  • RE: AD7779 performance evaluation

    Hi, 

    I was wondering the reason for the asked, are you trying to measure it and came up with different results? Or you are just really wanted to know the equations behind THD and SFDR? 

    I think the spec is based on the actual test/eval performance results…

  • RE: AD7779 MEMMAP_CRC_ERR Error abnormal occurrence

    Hi.

    Did you solve this problem?

    I have a same question too.

    Please give me a clue...

    Regards,

    Jack

  • ad7779 Gain Drift

    ad7779 的Gain Drift是多少?中文手册与英文不一样。 

  • AD7779

    AD7779有两种不同接口:SPI和数据输出接口。问题1:数据输出接口和单片机该怎样连接,到底采用哪种通信协议来接收数据?I/O口?USART?SPI?或者说是并口协议。还是说主控芯片必须采用DSP或FPGA,而不能用单片机。

    问题2:多片AD7779的级联,数据手册给出了菊花链模式,只说明了DOUTx模式,换言之必须使用数据输出接口,此时能用SPI接口接收数据吗?

    核心问题:我想用多片AD7779级联+STM32单片机设计EEG采集系统,请问采用菊花链模式下的AD7779通过单片机利用SPI配置AD7779芯片后…

  • RE: AD7779 power supply sequencing

    Hi,

    Apologies. I know this is long overdue. However if in case still necessary or someone may have similar issue. I recommend to check this similar thread.

    https://ez.analog.com/data_converters/precision_adcs/f/q-a/535489/ad7779-input-current-limit-and…

  • AD7779, SPI control and Dout

    Hi,

    I'm using multiple AD7779s in a measurement system. Currently I'm using Pin Config mode but need to use SPI mode in order to access some of the deeper configuration parameters. Ideally I want to use SPI to configure the device(s) and then collect…

  • AD7779 internal reference

    While planning to use the internal reference of the AD7779, I left unconnected the REFx+ and REFOUT pins (and connected the REFx- to AVSS). Tha ADC looks to works fine, but i experience a very large level of input refered noise.

    Looking back to the datasheet…

  • AD7779

    Please show me step by step how to calculate the temperature ADC7779 in celsius degrees.

  • AD7779

    When i read register CH0_ERR_REG,i found that:

    a、CH0-AINP undervoltage error,CH0-AINM undervoltage error,how can i deal these errors?

    thanks!