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…
I have been trying to configure and use the AD7172-4 for about a week now and am not having much luck.
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…
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。
I will answer myself here since I found the issue by a fluke. The problem was that my microcontroller ISP is interfaced on the same SPI lines. When running in debug mode it messed up the communication.
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…
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…
I'm a bit confused about the AD7172 sample rate in the datasheet. It says "The output data rates range from 1.25 SPS to 31.25 kSPS" and also says "has a maximum channel scan rate of 6.21 kSPS (161 µs) for fully settled data". I don't quite understand…