Texas Instruments recommends a 4-layer PCB with a solid ground plane, and placing the ADC close to the analog signal sources. Decoupling capacitors should be placed as close as possible to the VCC and GND pins. A dedicated analog ground plane is also recommended.
The ADS7804PB outputs 16-bit data in a serial format. The digital output data should be captured on the rising edge of the clock signal. The data is output in a MSB-first format, and the output data rate is equal to the clock frequency.
The maximum sampling rate of the ADS7804PB is 100 kSPS. However, the actual sampling rate may be limited by the clock frequency, which should be between 1 MHz and 4 MHz.
The ADS7804PB does not require calibration. It has an internal calibration circuit that is performed at power-up. However, the user may need to perform an external calibration if the ADC is used in a system with a specific gain or offset requirement.
The power consumption of the ADS7804PB is typically 15 mW at a clock frequency of 2 MHz and a supply voltage of 5 V. However, the actual power consumption may vary depending on the clock frequency, supply voltage, and operating conditions.
ADS7804PB datasheet
by Texas Instruments
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