ADS1243IPWT datasheet(20/25 Pages) TI

20 / 25 page

ADS1242, 1243

SBAS235B

www.ti.com

SYSOCAL–System Offset Calibration

Description: Initiates a system offset calibration. The input

should be set to 0V, and the ADS1242 and ADS1243 compute

the OCR value that compensates for offset errors. The Offset

Calibration Register (OCR) is updated after this operation. The

user must apply a zero input signal to the appropriate analog

inputs. The OCR register is automatically updated afterwards.

Operands:

None

Bytes:

Encoding:

1111 0011

Data Transfer Sequence:

SYSGCAL–System Gain Calibration

Description: Starts the system gain calibration process. For

a system gain calibration, the input should be set to the

reference voltage and the ADS1242 and ADS1243 compute

the FSR value that will compensate for gain errors. The FSR

is updated after this operation. To initiate a system gain

calibration, the user must apply a full-scale input signal to the

appropriate analog inputs. FCR register is updated automati-

cally.

Operands:

None

Bytes:

Encoding:

1111 0100

Data Transfer Sequence:

DSYNC–Sync DRDY

Description: Synchronizes the ADS1242 and ADS1243 to an

external event.

Operands:

None

Bytes:

Encoding:

1111 1100

Data Transfer Sequence:

SLEEP–Sleep Mode

Description: Puts the ADS1242 and ADS1243 into a low

power sleep mode. To exit sleep mode, issue the WAKEUP

command.

Operands:

None

Bytes:

Encoding:

1111 1101

Data Transfer Sequence:

RESET–Reset to Default Values

Description: Restore the registers to their power-up values.

This command stops the Read Continuous mode.

Operands:

None

Bytes:

Encoding:

1111 1110

Data Transfer Sequence:

WAKEUP

Description: Wakes the ADS1242 and ADS1243 from SLEEP

mode.

Operands:

None

Bytes:

Encoding:

1111 1011

Data Transfer Sequence:

1111 0011

1111 0100

1111 1011

1111 1100

1111 1101

1111 1110

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