The recommended power-on sequence is to apply VCC first, followed by VREF, and then the clock signal. This ensures proper device operation and prevents latch-up.
To enter power-down mode, set the PD pin low. In this mode, the device consumes minimal power, but the internal reference and oscillator are disabled. To exit power-down mode, set the PD pin high and wait for the t_WAKEUP time (typically 10 μs) before initiating conversions.
The REFOUT pin provides an output voltage reference (VREF) that can be used as an external reference for other devices. To use it, connect a 0.1 μF capacitor between REFOUT and GND, and then connect the output to the desired device. Ensure that the total load current does not exceed 0.5 mA.
To optimize for low-power operation, use the lowest possible clock frequency, reduce the conversion rate, and use the power-down mode when not converting. Additionally, consider using a lower VCC voltage (e.g., 2.7 V) and reducing the internal reference voltage (VREF) to minimize power consumption.
To minimize noise and ensure proper operation, follow these layout and routing guidelines: keep the analog and digital signals separate, use a solid ground plane, and place the device close to the analog signal sources. Additionally, use short, direct traces for the clock and data lines, and avoid running them near noisy signals or power traces.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
