SBAS683B August 2014 – May 2020 ADS1120-Q1
PRODUCTION DATA.
Chip select (CS) is an active-low input that selects the device for SPI communication. This feature is useful when multiple devices share the same serial bus. CS must remain low for the duration of the serial communication. When CS is taken high, the serial interface is reset, SCLK is ignored, and DOUT/DRDY enters a high-impedance state; as such, DOUT/DRDY cannot indicate when data are ready. In situations where multiple devices are present on the bus, the dedicated DRDY pin can provide an uninterrupted monitor of the conversion status. If the serial bus is not shared with another peripheral, CS can be tied low.