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 prevent EMI, it is recommended to use a low-inductance path for the digital outputs, such as a microstrip or stripline. Additionally, a series termination resistor can be used to reduce the output signal swing and minimize EMI. It is also recommended to use a shielded cable or a twisted pair for the digital output signals.
The recommended power-up sequence is to first apply the analog power supply (AVDD) and then the digital power supply (DVDD). The digital power supply should be powered up after the analog power supply has reached its nominal value. Additionally, the clock signal should be applied after the power supplies have been powered up.
The ADS7861IRHBT 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 gain and offset errors can be calculated and then used to correct the output data. Texas Instruments also provides a calibration routine in their data acquisition software.
The maximum sampling rate of the ADS7861IRHBT is 1.5 MSPS (mega-samples per second). However, the actual sampling rate may be limited by the system clock frequency, the analog input bandwidth, and the digital output data rate.
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ADS7861IRHBT Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
