ADS7844EB/2K5 datasheet by Texas Instruments

ADS7844EB/2K5 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 AVCC, and then the analog input voltage. This ensures proper operation and prevents latch-up.
• How do I optimize the ADC's performance for my specific application?
  To optimize performance, ensure proper PCB layout, use a low-noise power supply, and minimize digital noise coupling. Also, adjust the ADC's clock frequency, gain, and sampling rate according to your application's requirements.
• What is the maximum sampling rate I can achieve with the ADS7844?
  The maximum sampling rate of the ADS7844 is 200 kHz. However, the actual achievable sampling rate depends on the system clock frequency, conversion mode, and other factors.
• How do I handle the ADS7844's digital output data?
  The ADS7844 outputs 14-bit data in a serial format. You can use a microcontroller or FPGA to receive and process the data. Ensure proper synchronization and data formatting according to your system's requirements.
• What is the purpose of the ADS7844's internal reference voltage?
  The internal reference voltage (VREF) is used to set the full-scale range of the ADC. It can be bypassed using an external reference voltage if required. The internal VREF is 2.5 V, but it can be adjusted using external resistors.