CS5464-IS【PDF 30/46 页】IC PWR/ENERGY METER 3CH 28-SSOP

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CS5464

8.2.7 Peak Current (I1 PEAK , I2 PEAK ) and Peak Voltage (V1 PEAK , V2 PEAK )

Address: 18 ( I1 PEAK ), 19 ( V1 PEAK ), 22 ( I2 PEAK ), 23 ( V2 PEAK )

MSB

LSB

-(2 0 )

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

Peak current, I1 PEAK ( I2 PEAK ) and peak voltage, V1 PEAK ( V2 PEAK ) are the instantaneous current and voltage

samples with the greatest magnitude detected during the last low-rate interval. 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.

8.2.8 Apparent Power (S1, S2)

Address: 20 (S1), 24 (S2)

MSB

LSB

-(2 0 )

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

Apparent power S1 ( S2 ) is the product of V1 RMS and I1 RMS ( V2 RMS and I2 RMS ), These are two's complement

values in the range of 0 ? value ? 1.0, with the binary point to the right of the MSB.

8.2.9 Power Factor (PF1, PF2)

Address: 21 ( PF1 ), 25 ( PF2 )

MSB

LSB

-(2 0 )

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

Power factor is calculated by dividing active power by apparent power. The sign is determined by the active

power sign. 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.

8.2.10 Temperature (T) – Address: 27

MSB

LSB

-(2 7 )

2 6

2 5

2 4

2 3

2 2

2 1

2 0

.....

2 -10

2 -11

2 -12

2 -13

2 -14

2 -15

2 -16

T contains results from the on-chip temperature measurement. By default, T uses the Celsius scale, and is a

two's complement value in the range of -128.0 ? value ? 128.0 ( o C), with the binary point to the right of bit 16.

T can be rescaled by the application using the T GAIN and T OFF registers.

8.2.11 Active, Apparent, and Reactive Energy Pulse Outputs (E PULSE, S PULSE, Q PULSE )

Address: 29 (E PULSE ), 30 (S PULSE ), 31 (Q PULSE )

MSB

LSB

-(2 0 )

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

These drive the pulse outputs when configured to do so. If the Ichan bit in Modes is “0”, these registers are

driven from P1 AVG , S1 , and Q1 AVG , respectively. If the Ichan bit is “1”, these registers are driven from P2 AVG ,

S2 , and Q2 AVG , respectively. 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.

30

DS682F3

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