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's power pins.
The ADS8321E/2K5G4 has a built-in POR circuit that resets the device when the power supply voltage rises above 1.5V. To ensure proper operation, the power supply voltage should be ramped up slowly (less than 10ms) and the digital interface should be held in a reset state until the power supply is stable.
The maximum sampling rate of the ADS8321E/2K5G4 is 250kSPS. However, the device's power consumption increases with the sampling rate. At 250kSPS, the device consumes around 15mW, while at lower sampling rates (e.g. 100kSPS), the power consumption is around 10mW.
The ADS8321E/2K5G4 has an internal calibration circuit that can be used to calibrate the device. The recommended calibration procedure involves applying a known input voltage and reading the output code, then adjusting the internal calibration registers to achieve the desired accuracy. Texas Instruments provides a calibration procedure in the device's datasheet and application notes.
The ADS8321E/2K5G4's performance is affected by temperature, with the device's offset and gain errors increasing with temperature. To compensate for temperature-related errors, the device can be calibrated at multiple temperatures, and the calibration data can be stored in external memory. Additionally, temperature sensors can be used to monitor the device's temperature and adjust the calibration data accordingly.
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ADS8321E/2K5G4 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.
