71M6534-IGT/F Maxim Integrated Products, 71M6534-IGT/F Datasheet - Page 68

• Manufacturer Part Number: 71M6534-IGT/F
• Description: IC ENERY METER 3PH 128K 120-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 71M6534-IGT/F

• Mounting Style: SMD/SMT
• Package / Case: LQFP-120
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note: Ferrites or other inductive components must not be connected directly to the sensor input pins (InP,
InN Vn).
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
3 Application Information
3.1 Connection of Sensors (CT, Resistive Shunt)
Figure 31
shunts are connected to the voltage and current inputs of the 71M6533/71M6534.
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
RAM registers TRIMBGA, TRIMBGB, TRIMM[2:0]. The MPU can read these trim fuses and calculate the
68
I
in
I
in
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.
1/N
through
Figure 32: CT with Single Ended (Left) and Differential Input (Right) Connection
I
out
R
Figure 33
Figure 33: Resistive Shunt (Left), Rogowski Sensor (Right)
R
Filter
show how resistive dividers, current transformers, Rogowski coils and resistive
V
in
Figure 31: Resistive Voltage Divider
VA = Vin * R
V
V3P3
IA
out
V
V3P3
IA
R
out
in
out
/(R
I
I
IN
in
1/N
out
R
1/N
I
OUT
+ R
out
in
)
V
Vout = dI
V
out
OUT
VA
R
R
in
/dt
V
DIFF
IA
V
V3P3
C
InP
V3P3A
InN
Rev 2