Datasheet

20
ADCS7476 , ADCS7477 , ADCS7478
SNAS192G –APRIL 2003–REVISED MAY 2016 www.ti.com
Product Folder Links: ADCS7476 ADCS7477 ADCS7478
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Device Functional Modes (continued)
Figure 30. Entering Normal Mode
To exit shutdown mode, bring CS back low. Upon bringing CS low, the ADCS747x begins powering up. Power
up typically takes 1 µs. This microsecond of power-up delay results in the first conversion result being unusable.
The second conversion performed after power-up, however, is valid, as shown in Figure 30.
If CS is brought back high before the 10th falling edge of SCLK, the device returns to shutdown mode. This is
done to avoid accidentally entering normal mode as a result of noise on the CS line. To exit shutdown mode and
remain in normal mode, CS must be kept low until after the 10th falling edge of SCLK. The ADCS747x is fully
powered up after 16 SCLK cycles.