• AD7779 MEMMAP_CRC_ERR

    Writing to a register (for example register CH0_CONFIG (addr 0x000)) can cause the device to raise the ERROR flag in the data status header. Reading GEN_ERR_REG1 shows it’s a MEMMAP_CRC_ERR. After reading this register once, the error is cleared; also…

  • AD7779 gain seems off by x0.5

    Hi,

    I have a problem with the gain of the AD7779. It appears we always get about half the value I expect to get.

    My conditions:

    - Dual supply; AVDD = 1.65, AVSS = -1.65V, IOVDD = 3.3V
    - Vref- = AVSS (-1.65V), Vref+ = AVSS+2.5 (0.85V) --> Vref+ - Vref-…

  • 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…

  • ad7779 Gain Drift

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

  • 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…

  • RE: AD7779 MEMMAP_CRC_ERR Error abnormal occurrence

    Hi, 

    We can link this thread on this (+) AD7771 MEMMAP_CRC_ERR problem - Q&A - Precision ADCs - EngineerZone (analog.com) just in case others will have similar issues you can use a single thread for this. 

    Thanks,

    Jellenie

  • 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!

  • AD7779 MEMMAP_CRC_ERR Error

    Hello.

    I found  MEMMAP_CRC_ERR Error after checking the register of AD7779.

    So, I supplied the 100 ms reset pulse after the power supply.

    However, it is still in error.

    After clearing the MEMMAP_ CRC_TEST_EN bit, the error condition was disappeared.

    Can…

  • AD7779 vs AD7768

    I'm deciding between these two ADC's and would love some guidance/clarification.

    I am looking for a minimum 8-channel simultaneous sampling ADC for geophone sensors. I am leaning more towards AD7779 since it has one extra auxiliary differential…