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71M6534 Datasheet(PDF) 68 Page - Maxim Integrated Products

Part No. 71M6534
Description  Exceeds IEC 62053/ANSI C12.20 Standards
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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71M6534 Datasheet(HTML) 68 Page - Maxim Integrated Products

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71M6533/G/H and 71M6534/H Data Sheet
FDS_6533_6534_004
68
Rev 2
3 Application Information
3.1 Connection of Sensors (CT, Resistive Shunt)
Figure 31 through Figure 33 show how resistive dividers, current transformers, Rogowski coils and resistive
shunts are connected to the voltage and current inputs of the 71M6533/71M6534.
The analog input pins of the 71M65XX are designed for sensors with low source impedance. RC
filters with components differing from the components used in the Teridian Demo Boards should be
avoided. See Application Note AN5292 for details on filter implementation.
Figure 31: Resistive Voltage Divider
Figure 32: CT with Single Ended (Left) and Differential Input (Right) Connection
Figure 33: Resistive Shunt (Left), Rogowski Sensor (Right)
Note: Ferrites or other inductive components must not be connected directly to the sensor input pins (InP,
InN Vn).
3.2 Distinction between 71M6533/71M6534 and 71M6533G/H/71M6534H Parts
The 71M6533G, 71M6533H, and 71M6534H (high-accuracy) parts go through an additional process of
characterization during production which makes them suitable to high-accuracy performance over
temperature.
The first process, applied to all parts is the trimming of the reference voltage to the target value of 1.195
V.
The second process, which is applied only to the high-accuracy parts, is the characterization of the re-
ference voltage over temperature. The coefficients for the reference voltage are stored in trim fuses (I/O
RAM registers TRIMBGA, TRIMBGB, TRIMM[2:0]. The MPU can read these trim fuses and calculate the
VA = Vin * Rout/(Rout + Rin)
Vin
Rin
Rout
VA
Vout
R
1/N
Iin
Iout
Filter
V3P3
IA
InP
InN
V3P3A
VOUT
IOUT
IIN
R
1/N
VDIFF
Vout
R
Iin
IA
V3P3
Vout = dIin /dt
Vout
R
1/N
Iin
VC
V3P3
IA


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