Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep analog and digital signals separate. Use short, direct traces for the analog inputs and outputs, and avoid crossing digital signals over analog signals. Also, use a common mode filter capacitor (e.g., 10nF) between the analog input pins and the analog ground pin.
Calibration involves adjusting the internal offset and gain of the ADC. Use the CAL pin to initiate calibration, and then use the CAL_OUT pin to monitor the calibration process. The device will automatically adjust its internal offset and gain to achieve optimal performance. Refer to the datasheet for specific calibration procedures.
The maximum sampling rate of the ADS8695IPWR is 250 kSPS. As the sampling rate increases, the power consumption also increases. At 250 kSPS, the typical power consumption is around 35 mW. However, at lower sampling rates, the power consumption can be reduced to as low as 10 mW.
The ADS8695IPWR outputs 16-bit digital data in a serial format. The data is transmitted MSB-first, with the most significant bit (MSB) sent first. The output data is in two's complement format, with the sign bit (MSB) indicating the polarity of the input signal.
Texas Instruments recommends using a 10 μF ceramic capacitor and a 1 μF ceramic capacitor in parallel, connected between the AVDD pin and the AGND pin. This decoupling scheme helps to reduce noise and ensure optimal performance. A well-decoupled power supply is critical for achieving the specified performance of the ADS8695IPWR.
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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.
