Texas Instruments provides a layout and routing guide in the application note SLAA523, which recommends keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the analog input traces.
The ADS7861EB/2K5 has an internal calibration circuit that can be used to calibrate the device. The calibration process involves writing specific values to the calibration registers, and then performing a self-calibration sequence. The details of the calibration process are provided in the datasheet and the application note SLAA524.
The maximum sampling rate of the ADS7861EB/2K5 is 250 kSPS. The power consumption of the device increases with the sampling rate, and can be estimated using the power consumption formula provided in the datasheet. At the maximum sampling rate, the power consumption is approximately 15 mW.
The ADS7861EB/2K5 can be interfaced with a microcontroller using the SPI interface. Key considerations for the interface design include ensuring that the microcontroller can handle the high-speed data transfer, using a suitable clock frequency, and implementing a proper synchronization mechanism to ensure that the data is transferred correctly.
The ADS7861EB/2K5 and ADS7862 are both 12-bit, 250 kSPS ADCs, but they have some key differences. The ADS7862 has a higher signal-to-noise ratio (SNR) and a lower total harmonic distortion (THD), making it more suitable for high-precision applications. The ADS7861EB/2K5, on the other hand, has a lower power consumption and a smaller package size, making it more suitable for battery-powered and space-constrained applications.
ADS7861EB/2K5 datasheet
by Texas Instruments
