CS5464 datasheet(29/46 Pages) CIRRUS

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CS5464

DS682F3

8.2.2 Instantaneous Current (I1, I2), Voltage (V1, V2), and Power (P1, P2)

Address: 1 (I1), 2 (V1), 3 (P2), 7 (I2), 8 (V2), 9 (P2)

(I2) and V1 (V2) contain instantaneous current and voltage, respectively, which are multiplied to yield in-

stantaneous power, P1 (P2). These are two's complement values in the range of -1.0

 value  1.0, with the

binary point to the right of the MSB.

8.2.3 Active Power (P1AVG , P2AVG )

Address: 4 (P1AVG), 10 (P2AVG)

Instantaneous power is averaged over each low-rate interval (N samples) to compute active power, P1AVG

(P2AVG). These are two's complement values in the range of -1.0  value  1.0, with the binary point to the

right of the MSB.

8.2.4 RMS Current (I1RMS, I2RMS ) and Voltage (V1RMS, V2RMS )

Address: 5 (I1RMS), 6 (V1RMS), 11 (I2RMS), 12 (V2RMS)

I1RMS (I2RMS) and V1RMS (V2RMS) contain the root mean square (RMS) values of I1 (I2) and V1 (V2), calcu-

lated each low-rate interval. These are unsigned values in the range of 0

 value  1.0, with the binary point

to the left of the MSB.

8.2.5 Instantaneous Quadrature Power (Q1, Q2)

Address: 14 (Q1), 17 (Q2)

Instantaneous quadrature power, Q1 (Q2), the product of voltage1 (voltage2) shifted 90 degrees and current1

(current2). These are two's complement values in the range of -1.0

 value  1.0, with the binary point to the

right of the MSB.

8.2.6 Reactive Power (Q1AVG, Q2AVG )

Address: 13 (Q1AVG), 16 (Q2AVG)

Reactive power Q1AVG (Q2AVG) is Q1 (Q2) averaged over every N samples. These are two's complement

values in the range of -1.0

 value  1.0, with the binary point to the right of the MSB.

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

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

MSB

LSB

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

.....

2-18

2-19

2-20

2-21

2-22

2-23

2-24

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

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

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