Hello everone.
I have connected the EVAL-AD7172-4SDZ board to the SPI interface on a STM32F405 board. Writing to registers in the ADC seems to work fine, e.g. I can start a conversion in single conversion mode, set the ADC into standby mode or turn on…
Hi All
I have been trying to configure and use the AD7172-4 for about a week now and am not having much luck.
My Setup
各位好:
我使用AD7172-4芯片，REF+=3.3V，REF-=GND，采用Sinc5 + sinc1滤波，输出数据速度ODR=10次，参考寄存器选择REF_SEL0=00即参考为REF+和REF-，配置为差分采样模式。并且是连续采样模式。配置为24位。
当我在AIN0和AIN1上都接3.3V时，采样的输出的值为0x00FFFFFF，并且很稳定，不会发生变化
当我在AIN0和AIN1上都接1.8V时，采样的输出的值为0x00C1973X，其中X是一个变化值，变化范围很小，一般前后两次采样的值相差不过3…
Hi All
After finally getting the above device to behave sensibly, I have come across another issue. While it does not completely stop me using the chip, I would like to get to the bottom of the issue.
From what I am aware, this device allows any of…
Hi,
May I know how you you connected the EVB to the MCU board? Are they using the same IOVDD and their GNDs are also connected?
So for example if the EVB is powered up alone and probe the REGCAPA and REGCAPD are they both around 1.8V? or does the voltage…
Hi,
The Absolute Maximum Ratings of the AD7172-4 (p. 8) show two specifications for AIN pins: 10 mA and -0.3 V--AVDD+0.3 V.
Can I assume the DAC is safe as long as I ensure one of these conditions is met? For instance, I measure about 100 uA at -0.4…
Hi Winio,
The analog and digital supplies to the AD7172 are independent and connected to separate pins to minimize coupling between the analog and digital sections of the device. As indicated on the datasheet, the PCB designed must have analog and digital…
Hi,
Apologies, I would re-direct you the community shown below.
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