Texas Instruments provides a layout and routing guide in the application note 'ADS7956 Layout and Routing Guidelines' (SLAA544). It recommends keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the analog input traces.
The ADS7956SRHBT has an internal calibration circuit that can be used to calibrate the device. The calibration process involves applying a known input voltage and then reading the output code. The device can then be calibrated by adjusting the internal offset and gain registers. Texas Instruments provides a calibration procedure in the application note 'ADS7956 Calibration Procedure' (SLAA545).
The maximum sampling rate of the ADS7956SRHBT is 2.2 MSPS (million samples per second). However, the actual sampling rate may be limited by the system's clock frequency, the conversion time, and the settling time of the analog input signal.
Yes, the ADS7956SRHBT can be used in a multi-channel application. The device has a channel select input (CHSEL) that allows the user to select one of four analog input channels. The user can connect multiple ADS7956SRHBT devices to a single microcontroller or FPGA, and then use the CHSEL input to select the desired channel.
The power consumption of the ADS7956SRHBT is typically 35 mW at 2.7 V and 10 MSPS. The power consumption can be reduced by reducing the clock frequency, using the power-down mode, and minimizing the number of conversions. Additionally, the device has a low-power mode that can be enabled by setting the PDWN pin low.
ADS7956SRHBT datasheet
by Texas Instruments
