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90E21 Datasheet(PDF) 41 Page - Integrated Device Technology

Part # 90E21
Description  Single-Phase High-Performance Wide-Span Energy Metering IC
PDF  57 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

90E21 Datasheet(HTML) 41 Page - Integrated Device Technology

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90E21/22/23/24
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Register
41
January 10, 2012
5.5
MEASUREMENT REGISTER
Irms
L Line Current rms
Urms
Voltage rms
Address: 48H
Type: Read
Default Value: 0000H
Bit
Name
Description
15 - 0
Irms[15:0]
L line current rms.
Data format is XX.XXX, which corresponds to 0 ~ 65.535A.
For cases when the current exceeds 65.535A, it is suggested to be handled by MCU in application. For example, the register
value can be calibrated to 1/2 of the actual value during calibration, then multiplied by 2 in application.
Address: 49H
Type: Read
Default Value: 0000H
Bit
Name
Description
15 - 0
Urms[15:0]
Voltage rms.
Data format is XXX.XX, which corresponds to 0 ~ 655.35V.
15
14
13
12
11
10
9
8
Irms15
Irms14
Irms13
Irms12
Irms11
Irms10
Irms9
Irms8
765
432
1
0
Irms7
Irms6
Irms5
Irms4
Irms3
Irms2
Irms1
Irms0
15
14
13
12
11
10
9
8
Urms15
Urms14
Urms13
Urms12
Urms11
Urms10
Urms9
Urms8
765
432
1
0
Urms7
Urms6
Urms5
Urms4
Urms3
Urms2
Urms1
Urms0



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