ADS1299
SBAS499A –JULY 2012–REVISED AUGUST 2012
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When using multiple devices, the devices can be synchronized with the START signal. The delay from START to
the DRDY signal is fixed for a fixed data rate (see the START subsection of the SPI Interface section for more
details on the settling times). Figure 39 shows the behavior of two devices when synchronized with the START
signal.
There are two ways to connect multiple devices with a optimal number of interface pins: cascade mode and
daisy-chain mode.
Device 1
START
CLK
START1
CLK
DRDY1
DRDY
Device 2
START2
CLK
DRDY2
DRDY
CLK
START
DRDY1
DRDY2
Figure 39. Synchronizing Multiple Converters
32
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