71M6511-IGTR/F Maxim Integrated Products, 71M6511-IGTR/F Datasheet - Page 70

• Manufacturer Part Number: 71M6511-IGTR/F
• Description: IC ENERGY METER RESIDENT 64-LQFP
• Manufacturer: Maxim Integrated Products
• Type: Metering SoCr

Specifications of 71M6511-IGTR/F

• Mounting Style: SMD/SMT
• Package / Case: LQFP-64
• Core: 80515 MPU
• Data Bus Width: 32 bit
• Data Ram Size: 7 KB
• Device Million Instructions Per Second: 5 MIPS
• Interface Type: UART
• Maximum Clock Frequency: 70 Hz
• Maximum Operating Temperature: + 85 C
• Number Of Programmable I/os: 12
• Operating Supply Voltage: 3.3 V
• Processor Series: 71M6511
• Program Memory Size: 64 KB
• Program Memory Type: Flash
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Temperature Measurement and Temperature Compensation
Input variables: TEMP_NOM is the reference value for temperature measurement, i.e. when this value is set with
TEMP_RAW_X at known temperature. The 71M6511/6511H measures temperature with reference to this value.
DEGSCALE is the slope or rate of temperature increase or decrease from the TEMP_NOM for TEMP_X measurement.
PPMC and PPMC2 are temperature compensation coefficients. Their values should reflect the characteristics of the band gap
voltage reference of the chip. PPMC and PPMC2 follow the square law characteristics to compensate for nonlinear temperature
behaviors, when the 71M6511/6511H is in internal temperature compensation mode.
EXT_TEMP allows the MPU to select between direct control of GAIN_ADJ or management of GAIN_ADJ by the CE, based on
TEMP_X and the temperature correction coefficients PPMC and PPMC2.
Output variables: TEMP_X is the temperature measurement from reference temperature of TEMP_NOM. TEMP_X is
computed using TEMP_RAW_X and DEGSCALE. This quantity is positive when the temperature is above the reference and is
negative for cold temperatures.
TEMP_RAW_X is the raw processed value from ADC output and is the fundamental quantity for temperature measurement.
TEMP_RAW_X is less than TEMP_NOM at higher temperatures. TEMP_RAW_X is more than TEMP_NOM for cooler
temperatures than reference temperature.
Page: 70 of 98
Addres
0x11
0x30
0x38
0x39
0x3A
CE
s
A Maxim Integrated Products Brand
TEMP_NOM
DEGSCALE
EXT_TEMP
Name
PPMC
PPMC
2
© 2005–2010 Teridian Semiconductor Corporation
Defaul
9585
0
0
0
0
t
Description
During calibration, the value of TEMP_RAW_X should be placed in
TEMP_NOM.
Scale factor for TEMP_X.
TEMP_X = -DEGSCALE*2
Should be 15 or 0. When 15, causes the CE to ignore internal tem-
perature compensation and permits the MPU to control GAIN_ADJ.
When internal temperature compensation is selected, GAIN_ADJ will be:
Default is 0 (internal compensation).
Linear temperature compensation factor. Equals the linear temperature
coefficient (PPM/°C) of VREF multiplied by 26.84, or TC1 (expressed in
µV/°C, see Electrical Specifications) multiplied by 22.46. A positive
value will cause the meter to run faster when hot. The compensation
factor affects both V and I and will therefore have a double effect on
products.
Square-law temperature compensation factor. Equals the square-law
temperature coefficient (PPM/°C
(expressed in µV/°C
1150.1. A positive value will cause the meter to run faster when hot. The
compensation factor affects both V and I and will therefore have a
double effect on products.
GAIN
_
ADJ
Single-Phase Energy Meter IC
=
16384
2
+
, see Electrical Specifications) multiplied by
71M6511/71M6511H
floor
-22
*(TEMP_RAW_X-TEMP_NOM).

 

1
DATA SHEET
+
TEMP
2
) of VREF multiplied by 1374, or TC2
_
2
X
14
⋅
PPMC
+
TEMP
NOVEMBER 2010
_
X
2
23
2
⋅
PPMC
V2.7
2

 
