ADC121S625CIMMX/NOPB datasheet by Texas Instruments

ADC121S625CIMMX/NOPB Frequently Asked Questions (FAQs)

• What is the recommended input impedance for the ADC121S625?
  The recommended input impedance for the ADC121S625 is 1 kΩ to 10 kΩ. This ensures proper signal attenuation and prevents signal reflections.
• How do I optimize the ADC121S625's performance for low-frequency signals?
  To optimize the ADC121S625's performance for low-frequency signals, use a higher gain setting (e.g., GAIN = 1 or 2) and a slower sampling rate (e.g., 100 kSPS or 200 kSPS). This will improve the ADC's sensitivity and accuracy for low-frequency signals.
• What is the purpose of the ADC121S625's internal reference voltage?
  The internal reference voltage (VREF) of the ADC121S625 is used to set the full-scale input range of the ADC. It can be used as a reference voltage for external circuitry or as a voltage source for other components in the system.
• Can I use the ADC121S625 with a single-ended input signal?
  Yes, the ADC121S625 can be used with a single-ended input signal. However, the input signal should be biased to the mid-point of the supply voltage (VCC/2) to ensure proper operation. Additionally, the input signal should be AC-coupled to the ADC input to prevent DC offset errors.
• How do I handle the ADC121S625's digital output data?
  The ADC121S625's digital output data is presented in a 12-bit, two's complement format. The data should be read from the ADC's output registers and processed accordingly. The ADC also provides an optional CRC (Cyclic Redundancy Check) feature to ensure data integrity.