Datasheet

SCLK
DIN
DRDY
1 8
t
CAL
Calibration
Command
Calibration
Starts
Calibration
Complete
ADS1146
ADS1147
ADS1148
www.ti.com SBAS453F –JULY 2009–REVISED APRIL 2012
CALIBRATION COMMANDS
The ADS1146/7/8 provide system and offset calibration commands and a system gain calibration command.
SYSOCAL—Offset system calibration.
This command initiates a system offset calibration. For a system offset calibration, the input should be
externally set to zero. The OFC register is updated when this operation completes.
SYSGCAL—System gain calibration.
This command initiates the system gain calibration. For a system gain calibration, the input should be set to
full-scale. The FSC register is updated after this operation.
SELFOCAL—Self offset calibration.
This command initiates a self-calibration for offset. The device internally shorts the inputs and performs the
calibration. The OFC register is updated after this operation.
Figure 50. Calibration Command
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Product Folder Link(s): ADS1146 ADS1147 ADS1148