CS5490 Datasheet, PDF (49/57 Pages) Cirrus Logic – Two Channel Energy Measurement IC

CS5490
6.6.45 Total Reactive Power (Q_SUM) – Page 16, Address 31
MSB
LSB
-(2⁰) 2^-1
2^-2
2^-3
2^-4
2^-5
2^-6
2^-7
..... ₂^-17 ₂^-18 ₂^-19 ₂^-20 ₂^-21 ₂^-22 ₂^-23
Default = 0
Q_SUM = Q_AVG
This is a two's complement value in the range of -1.0  value  1.0, with the binary point to the right of the
MSB.
6.6.46 DC Offset for Current (I_DCOFF) – Page 16, Address 32
MSB
LSB
-(2⁰) 2^-1
2^-2
2^-3
2^-4
2^-5
2^-6
2^-7
..... ₂^-17 ₂^-18 ₂^-19 ₂^-20 ₂^-21 ₂^-22 ₂^-23
Default = 0
DC offset registers I_DCOFF are initialized to zero on reset. During DC offset calibration, selected registers are
written with the inverse of the DC offset measured. The application program can also write the DC offset reg-
ister values. This is a two's complement value in the range of -1.0  value  1.0, with the binary point to the
right of the MSB.
6.6.47 DC Offset for Voltage (V_DCOFF) – Page 16, Address 34
MSB
LSB
-(2⁰) 2^-1
2^-2
2^-3
2^-4
2^-5
2^-6
2^-7
..... ₂^-17 ₂^-18 ₂^-19 ₂^-20 ₂^-21 ₂^-22 ₂^-23
Default = 0
DC offset registers V_DCOFF are initialized to zero on reset. During DC offset calibration, selected registers are
written with the inverse of the DC offset measured. The application program can also write the DC offset reg-
ister values. It is a two's complement value in the range of -1.0  value  1.0, with the binary point to the right
of the MSB.
6.6.48 Gain for Current (I_GAIN) – Page 16, Address 33
MSB
LSB
2¹
2⁰
2^-1
2^-2
2^-3
2^-4
2^-5
2^-6
..... ₂^-16 ₂^-17 ₂^-18 ₂^-19 ₂^-20 ₂^-21 ₂^-22
Default = 1.0
Gain register I_GAIN is initialized to 1.0 on reset. During gain calibration, the I_GAIN register is written with the
multiplicative inverse of the gain measured. This is an unsigned fixed-point value in the range of
0  value  4.0, with the binary point to the right of the second MSB.
DS982F3
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