ADS7844NBG4 datasheet by Texas Instruments

ADS7844NBG4 Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the ADS7844?
  The recommended power-up sequence is to apply VCC first, followed by VREF, and then the clock signal. This ensures proper initialization of the device.
• How do I handle the busy signal (BUSY) during conversion?
  The BUSY signal goes high during conversion and remains high until the conversion is complete. The host should wait for BUSY to go low before accessing the data.
• What is the maximum frequency of the clock signal (CLK) that can be used?
  The maximum frequency of the clock signal is 3.25 MHz. Exceeding this frequency may result in incorrect conversions or device malfunction.
• How do I configure the gain of the ADC?
  The gain of the ADC can be configured using the GAIN[1:0] pins. The gain settings are: 00 = 1x, 01 = 2x, 10 = 4x, and 11 = 8x.
• What is the purpose of the CAL pin?
  The CAL pin is used to initiate a self-calibration sequence. When CAL is pulled low, the device performs a self-calibration and adjusts its internal offset and gain settings.