I am using AD5726. On the datasheet there is reference input current (pag.3), for VREFN there is written -1mA (max).
My question is: should I consider 1mA going inside the chip or 1mA coming from the chip ? What does minus means ?

Thanks.
Lucio

Please refer to this document:

http://www.analog.com/media/en/technical-documentation/data-sheets/AD5726.pdf 

1. Table 3, bottom line (page 5) states that the glitch is typically 30 nV*s, under very different conditions:

AVDD = +5 V ± 5% or +15 V ± 5…

Hello support team,

1. The AD5726 datasheet says that the minimal negative reference voltage is -10V. On the other hand, typical application discussed throughout the datasheet utilizes +/-10V references. So it looks like the datasheet suggests working…

In AD5726 datasheet ,Figure25 have OP1177 voltage follower.

And OP1177 output have 0.2uF capacitor.

But voltage follower OP1177 with output 0.2uF have only a few phase margine  in ADIsim.

I think that this circuit is unstable.

Is this consideration…

Question:

我将AD5726写寄存器的函数（4通道一起次性完），通过双线SPI写进去的控制字只有1通道与4通道有效；

意思是AD5726_spi_write()一次性运行完就只有1通道与4通道有效；

但是我将AD5726_spi_write()用单步运行，等到程序运行完，4个通道都有效，DAC输出的值是对的。

我用示波器看了SDIN上面的数据，传输的数据是对的，为啥void AD5726_spi_write(void)一次性运行完就不对呢？

奇怪，希望得到指点！谢谢！

我SPI的CLK…