71m6511h-igtr Maxim Integrated Products, Inc., 71m6511h-igtr Datasheet - Page 76

• Manufacturer Part Number: 71m6511h-igtr
• Description: Single-phase Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

APPLICATION INFORMATION
Figure 29 and Figure 30 show how resistive dividers, current transformers, restive shunts, and Rogowski coils are connected
to the voltage and current inputs of the 71M6511.
71M6511H parts go through a process of trimming and characterization during production that make them suitable to high-
accuracy applications.
The first process applied to the 71M6511H is the trimming of the reference voltage, which is guaranteed to have accuracy over
temperature of better that ±10PPM/°C.
The second process applied to the 71M6511H is the characterization of the reference voltage over temperature. The
coefficients for the reference voltage are stored in so-called trim fuses (I/O RAM registers TRIMBGA, TRIMBGB, TRIMM[2:0].
The MPU program can read these trim fuses and calculate the correction coefficients PPM1 and PPM2 per the formulae given
in the Performance Specifications section (VREF, VBIAS). See the Temperature Compensation section for details.
The fuse TRIMBGB is non-zero for the 71M6511H part and zero for the 71M6511 part.
Trim fuse information is not available for non-H parts. Thus, the standard are to be applied. These settings are:
Page: 76 of 95
I
in
•
•
V
in
PPMC = TC1 * 22.46 = –149
PPMC2 = TC2 * 1150.1 = –392
VA = Vin * R
Vout = R * I
R
R
in
Figure 29: Resistive Voltage Divider (left), Current Transformer (right)
Connection of Sensors (CT, Resistive Shunt, Rogowski Coil)
out
/(R
in
Distinction between 71M6511 and 71M6511H Parts
Figure 30: Resistive Shunt (left), Rogowski Coil (right)
out
R
V
+ R
out
V3P3
IA
out
© 2005-2007 TERIDIAN Semiconductor Corporation
in
)
I
in
VA
I
in
core
1/N
I
I
in
in
Single-Phase Energy Meter IC
I
out
1/N
1/N
Vout = R * I
R
71M6511/71M6511H
Filter
V
V
Vout = dI
Vout = dI
out
out
DATA SHEET
out
= R * I
V3P3
IA
V
out
R
R
I
in
in
in
in
/N
/dt
/dt
I
out
AUGUST 2007
IA
IA
V
V
V3P3
V3P3
C
C
V2.6