COMBOSMARTMETER datasheet(40/60 Pages) TI1

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ADS131E04

ADS131E06

ADS131E08

SBAS561A – JUNE 2012 – REVISED APRIL 2013

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CONFIG3: Configuration Register 3

Address = 03h

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

PDB_REFBUF

VREF_4V

OPAMP_REF

PDB_OPAMP

This register configures the multireference operation.

Bit 7

PDB_REFBUF: Power-down reference buffer

This bit determines the power-down reference buffer state.

0 = Power-down internal reference buffer (default)

1 = Enable internal reference buffer

Bit 6

Must be set to '1'

Default is '1' at power-up.

Bit 5

VREF_4V: Reference voltage

This bit determines the reference voltage, VREFP.

0 = VREFP is set to 2.4 V (default)

1 = VREFP is set to 4 V (use only with a 5-V analog supply)

Bit 4

Must be set to '0'

Bit 3

OPAMP_REF: Op amp reference

This bit determines whether the op amp noninverting input connects to the OPAMPP pin or to the internally-derived 1/2

supply (AVDD + AVSS) / 2.

0 = Noninverting input connected to the OPAMPP pin (default)

1 = Noninverting input connected to (AVDD + AVSS) / 2

Bit 2

PDB_OPAMP: Op amp power down

This bit determines the power-down reference buffer state.

0 = Power-down op amp (default)

1 = Enable op amp

Bits[1:0]

Must be set to '0'

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COMBOSMARTMETER Datasheet(PDF) 40 Page - Texas Instruments

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