Datasheet

ADS1246

ADS1247

ADS1248

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SBAS426G –AUGUST 2008–REVISED OCTOBER 2011

ADS1247 and ADS1248 DETAILED REGISTER DEFINITIONS (continued)

IDAC1—IDAC Control Register 1

IDAC1 - ADDRESS 0Bh RESET VALUE = FFh

DEVICE BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

ADS1248 I1DIR3 I1DIR2 I1DIR1 I1DIR0 I2DIR3 I2DIR2 I2DIR1 I2DIR0

ADS1247 0 0 I1DIR1 I1DIR0 0 0 I2DIR1 I2DIR0

The two IDACs on the ADS1247/8 can be routed to either the IEXC1 and IEXC2 output pins or directly to the

analog inputs.

Bits 7:4 I1DIR3:0

These bits select the output pin for the first current source DAC.

0000 = AIN0

0001 = AIN1

0010 = AIN2

0011 = AIN3

0100 = AIN4 (ADS1248 only)

0101 = AIN5 (ADS1248 only)

0110 = AIN6 (ADS1248 only)

0111 = AIN7 (ADS1248 only)

10x0 = IEXT1 (ADS1248 only)

10x1 = IEXT2 (ADS1248 only)

11xx = Disconnected (default)

Bits 3:0 I2DIR3:0

These bits select the output pin for the second current source DAC.