Datasheet

ADS1146
ADS1147
ADS1148
www.ti.com SBAS453F –JULY 2009–REVISED APRIL 2012
ADS1147 AND ADS1148 DETAILED REGISTER DEFINITIONS (continued)
FSC[23:0]
These bits make up the full-scale calibration coefficient register.
FSC0—Full-Scale Calibration Coefficient Register 0
FSC0 - ADDRESS 07h RESET VALUE IS PGA DEPENDENT
(1)
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
FSC7 FSC6 FSC5 FSC4 FSC3 FSC2 FSC1 FSC0
(1) The reset value for FSC is factory-trimmed for each PGA setting. Note that the factory-trimmed FSC reset value is automatically loaded
whenever the PGA setting is changed.
FSC1—Full-Scale Calibration Coefficient Register 1
FSC1 - ADDRESS 08h RESET VALUE IS PGA DEPENDENT
(1)
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
FSC15 FSC14 FSC13 FSC12 FSC11 FSC10 FSC9 FSC8
(1) The reset value for FSC is factory-trimmed for each PGA setting. Note that the factory-trimmed FSC reset value is automatically loaded
whenever the PGA setting is changed.
FSC2—Full-Scale Calibration Coefficient Register 2
FSC2 - ADDRESS 09h RESET VALUE IS PGA DEPENDENT
(1)
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
FSC23 FSC22 FSC21 FSC20 FSC19 FSC18 FSC17 FSC16
(1) The reset value for FSC is factory-trimmed for each PGA setting. Note that the factory-trimmed FSC reset value is automatically loaded
whenever the PGA setting is changed.
IDAC0—IDAC Control Register 0
IDAC0 - ADDRESS 0Ah RESET VALUE = x0h
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
ID3 ID2 ID1 ID0 DRDY MODE IMAG2 IMAG1 IMAG0
Bits[7:4] ID[3:0]
Read-only, factory-programmed bits; used for revision identification.
Bit 3 DRDY MODE
This bit sets the DOUT/DRDY pin functionality. In either setting of the DRDY MODE bit, the DRDY
pin continues to indicate data ready, active low.
0 = DOUT/DRDY pin functions only as Data Out (default)
1 = DOUT/DRDY pin functions both as Data Out and Data Ready, active low
Bits[2:0] IMAG[2:0]
The ADS1147 and ADS1148 have two programmable current source DACs that can be used for
sensor excitation. The IMAG bits control the magnitude of the excitation current. The IDACs require
the internal reference to be on.
000 = off (default)
001 = 50μA
010 = 100μA
011 = 250μA
100 = 500μA
101 = 750μA
110 = 1000μA
111 = 1500μA
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