Offset Register; Full-Scale Register - Analog Devices AD7195 Manual

AD7195

OFFSET REGISTER

(RS2, RS1, RS0 = 1, 1, 0; Power-On/Reset = 0x800000)
The offset register holds the offset calibration coefficient for the
ADC. The power-on reset value of the offset register is
0x800000. The AD7195 has four offset registers; therefore, each
channel has a dedicated offset register (see Table 25). Each of
these registers is a 24-bit read/write register. This register is
used in conjunction with its associated full-scale register to
form a register pair. The power-on reset value is automatically
overwritten if an internal or system zero-scale calibration is
initiated by the user. The AD7195 must be placed in power-
down mode or idle mode when writing to the offset register.
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FULL-SCALE REGISTER

(RS2, RS1, RS0 = 1, 1, 1; Power-On/Reset = 0x5XXXX0)
The full-scale register is a 24-bit register that holds the full-scale
calibration coefficient for the ADC. The AD7195 has four full-
scale registers; therefore, each channel has a dedicated full-scale
register (see Table 25). The full-scale registers are read/write
registers. However, when writing to the full-scale registers, the
ADC must be placed in power-down mode or idle mode. These
registers are configured at power-on with factory-calibrated
full-scale calibration coefficients, the calibration being performed
at gain = 1. Therefore, every device has different default coeffic-
ients. The default value is automatically overwritten if an
internal or system full-scale calibration is initiated by the user
or if the full-scale register is written to.
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