The recommended power-up sequence is to apply VCC first, followed by VREF, and then the analog input signal. This ensures proper operation and prevents damage to the device.
To optimize the analog input signal range, ensure that the input signal is within the specified range of 0 to VREF. You can also adjust the gain of the input signal using an external amplifier or attenuator to match the full-scale range of the ADC.
The recommended clock frequency for the ADS7844E/2K5 is between 1 MHz and 3.25 MHz. Operating the device at frequencies outside this range may affect its performance and accuracy.
The ADS7844E/2K5 outputs 12-bit digital data in a serial format. You can use a microcontroller or FPGA to receive and process the data. Ensure that the receiving device is properly synchronized with the ADC's clock signal to avoid data errors.
The CAL pin is used for calibration purposes. When the CAL pin is pulled low, the ADC enters calibration mode, which allows for internal offset and gain calibration. This pin should be tied high during normal operation.
ADS7844E/2K5 datasheet
by Texas Instruments
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