Datasheet

SCLK
DIN CommandByte1 CommandByte2
DOUT Don'tCare RegisterData5 RegisterData6
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15
16 17 18 25 2619 20 21 22 23 24
Example:Readsixregisters,startingatregister05h(OFC0)
CommandByte1=00100101
CommandByte2=00000101
t
DLY
t
DLY
t
DLY
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 25 2619 20 21 22 23 24
SCLK
DIN CommandByte1 CommandByte2 RegisterData5 RegisterData6
Example:Writesixregisters,startingatregister05h(OFC0)
CommandByte1=01000101
CommandByte2=00000101
t
DLY
t
DLY
t
DLY
ADS1281
SBAS378D –AUGUST 2007–REVISED JUNE 2010 www.ti.com
OFSCAL: Offset Calibration GANCAL: Gain Calibration
Description: This command performs an offset Description: This command performs a gain
calibration. The inputs to the converter (or the inputs calibration. The inputs to the converter should have a
to the external pre-amplifier) should be zeroed and stable dc input (typically full-scale, but not to exceed
allowed to stabilize before sending this command. 103% full-scale). The full-scale calibration register
The offset calibration register updates after this updates after this operation. See the Calibration
operation. See the Calibration Commands section for Commands section for more details.
more details.
Figure 54. Read Register Data (Table 22 shows t
DLY
)
Figure 55. Write Register Data (Table 22 shows t
DLY
)
Table 22. t
DRY
Value
PARAMETER MIN
t
DLY
24/f
CLK
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