Datasheet

ADP1053 Data Sheet
Rev. A | Page 76 of 84
RTD TRIM REGISTERS
Table 117. Register 0xFE7C—RTD1 Offset Trim (MSB)
Bits Bit Name R/W Description
[7:2] Reserved R/W Reserved.
1 Trim polarity R/W 1 = negative gain is introduced.
0 = positive gain is introduced.
0
RTD1 offset trim
(MSB)
R/W
This bit, together with Register 0xFE7D, sets the amount of offset trim that is applied to the
RTD1 ADC reading.
Table 118. Register 0xFE7D—RTD1 Offset Trim (LSBs)
Bits Bit Name R/W Description
[7:0]
RTD1 offset trim
(LSBs)
R/W
These eight bits, together with Bit 0 of Register 0xFE7C, sets the amount of offset trim that is
applied to the RTD1 ADC reading.
Table 119. Register 0xFE7E—RTD2 Offset Trim (MSB)
Bits Bit Name R/W Description
[7:2] Reserved R/W Reserved.
1 Trim polarity R/W 1 = negative gain is introduced.
0 = positive gain is introduced.
0
RTD2 offset trim
(MSB)
R/W
This bit, together with Register 0xFE7F, sets the amount of offset trim that is applied to the RTD2
ADC reading.
Table 120. Register 0xFE7F—RTD2 Offset Trim (LSBs)
Bits Bit Name R/W Description
[7:0]
RTD2 offset trim
(LSBs)
R/W
These eight bits, together with Bit 0 of Register 0xFE7E, sets the amount of offset trim that is
applied to the RTD2 ADC reading.
Table 121. Register 0xFE80—RTD1 Current Source Settings
Bits Bit Name R/W Description
[7:6] RTD1 current setting R/W These bits set the size of the current source on the RTD1 pin. The factory default setting is 10 µA.
Bit 7 Bit 6 Current Source (μA)
0 0 10
0 1 20
1 0 30
1 1 40
[5:0]
RTD1 current fine
adjust
R/W
These bits are used to adjust the current source on the RTD1 pin. Each LSB corresponds to
156.25 nA, independent of the RTD1 current source setting specified by Bits[7:6].
Table 122. Register 0xFE81—RTD2 Current Source Settings
Bits Bit Name R/W Description
[7:6] RTD2 current setting R/W These bits set the size of the current source on the RTD2 pin. The factory default setting is 10 µA.
Bit 7 Bit 6 Current Source (μA)
0 0 10
0 1 20
1 0 30
1 1 40
[5:0]
RTD2 current fine
adjust
R/W
These bits are used to adjust the current source on the RTD2 pin. Each LSB corresponds to
156.25 nA, independent of the RTD2 current source setting specified by Bits[7:6].