Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital signals separate. The analog input traces should be short and direct, and the digital output traces should be routed away from the analog inputs. Additionally, decoupling capacitors should be placed close to the device to filter out noise.
The ADS7043IDCUR does not require calibration, as it is a ratiometric ADC that uses an internal reference voltage. However, it is recommended to perform a system-level calibration to account for any system-level errors or offsets. This can be done by taking readings at multiple input voltages and adjusting the output values accordingly.
The maximum sampling rate of the ADS7043IDCUR is 1 MSPS. To achieve this rate, the device must be operated in the 'Fast' mode, and the clock frequency must be set to 4 MHz or higher. Additionally, the input signals must be properly filtered and settled before taking a reading.
The ADS7043IDCUR has internal overvoltage protection on the analog input pins, which can withstand up to 6 V. However, it is still recommended to add external protection circuitry, such as voltage dividers or clamping diodes, to prevent damage from excessive voltage levels.
Yes, the ADS7043IDCUR can be used in a multi-channel application. To multiplex the inputs, an external multiplexer can be used to switch between the different input channels. The ADS7043IDCUR has a 'Channel Select' pin that can be used to select the input channel, and the device can be operated in a 'Scan' mode to automatically sequence through the input channels.
ADS7043IDCUR datasheet
by Texas Instruments
