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參數(shù)資料
| 型號： | 71M6511-IGTR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 封裝： | LEAD FREE, LQFP-64 |
| 文件頁數(shù)： | 68/98頁 |
| 文件大小： | 1278K |
| 代理商： | 71M6511-IGTR/F |
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71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 70 of 98
2005–2010 Teridian Semiconductor Corporation
V2.7
A Maxim Integrated Products Brand
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.
CE
Addres
s
Name
Defaul
t
Description
0x11
TEMP_NOM
0
During calibration, the value of TEMP_RAW_X should be placed in
TEMP_NOM.
0x30
DEGSCALE
9585
Scale factor for TEMP_X.
TEMP_X = -DEGSCALE*2
-22*(TEMP_RAW_X-TEMP_NOM).
0x38
EXT_TEMP
0
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:
+
+
=
23
2
14
2
_
2
_
1
16384
_
PPMC
X
TEMP
PPMC
X
TEMP
floor
ADJ
GAIN
Default is 0 (internal compensation).
0x39
PPMC
0
Linear temperature compensation factor. Equals the linear temperature
coefficient (PPM/°C) of VREF multiplied by 26.84, or TC1 (expressed in
V/°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.
0x3A
PPMC
2
0
Square-law temperature compensation factor. Equals the square-law
temperature coefficient (PPM/°C
2) of VREF multiplied by 1374, or TC2
(expressed in V/°C
2, see Electrical Specifications) multiplied by
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.
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.
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