CS5490-ISZ View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5490-ISZ

Two Channel Energy Measurement IC

Cirrus Logic 

CS5490

6.6.21 System Gain (SysGAIN) – Page 16, Address 60

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 = 0x50 0000 (1.25)

System Gain (SysGAIN) is applied to all channels.

By default, SysGAIN = 1.25, but can be finely adjusted to compensate for voltage reference error. It is a two's

complement value in the range of -2.0  value  2.0, with the binary point to the right of the second MSB. Val-

ues should be kept within 5% of 1.25.

6.6.22 Rogowski Coil Integrator Gain (IntGAIN) – Page 18, Address 43

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 = 0x14 3958

Gain for the Rogowski coil integrator. This must be programmed accordingly for 50Hz and 60Hz (0.158 for

50Hz, 0.1875 for 60Hz).

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. Negative values are not used.

6.6.23 System Time (Time) – Page 16, Address 61

MSB

LSB

223

222

221

220

219

218

217

216

.....

26

25

24

23

22

21

20

Default = 0x00 0000

System Time (Time) is measured in output word rate (OWR) samples.

This is an unsigned integer in the range of 0 to 16,777,215 samples. At OWR = 4.0 kHz, OWR will overflow

every 1 hour, 9 minutes, 54 seconds. Time can be used by the application to manage real-time events.

6.6.24 Voltage Sag Duration (VSagDUR) – Page 17, Address 0

MSB

LSB

0

222

221

220

219

218

217

216

.....

26

25

24

23

22

21

20

Default = 0x00 0000

Voltage sag duration, VSagDUR, determines the count of output word rate (OWR) samples utilized to deter-

mine a sag event.

These are integers in the range of 0 to 8,388,607 samples. A value of zero disables the feature.

42

DS982F2

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