The recommended power-up sequence is to apply VDD (analog supply) first, followed by VIO (digital supply) and then the clock signal. This ensures proper initialization of the device.
To optimize the analog input impedance, use a low-impedance source, such as a buffer amplifier, and keep the input traces as short as possible. Additionally, use a capacitor in parallel with the input resistor to filter out high-frequency noise.
The ADS7865IPBS supports clock frequencies up to 20 MHz. However, the maximum clock frequency may vary depending on the specific application and system requirements.
The ADS7865IPBS outputs data in a 16-bit, two's complement format. The most significant bit (MSB) represents the sign bit, and the remaining 15 bits represent the magnitude. You can use a microcontroller or FPGA to process the output data.
The SYNC pin is used to synchronize the conversion process with an external clock or trigger signal. It allows the device to start a new conversion cycle on the rising edge of the SYNC signal.
ADS7865IPBS datasheet
by Texas Instruments
