参数资料
型号: 71M6531F-DB
厂商: Maxim Integrated Products
文件页数: 64/121页
文件大小: 0K
描述: BOARD DEMO 71M6531F
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式:
已用 IC / 零件: 71M6531
主要属性: 单相功率表
已供物品: 2 个板,线缆,CD,电源
Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
3.3
Temperature Measurement
Measurement of absolute temperature uses the on-chip temperature sensor and applying the following
formula:
T =
( N ( T ) ? N n )
S n
+ T n
In the above formula, T is the temperature in °C, N( T ) is the ADC count at temperature T , N n is the ADC
count at 25°C, S n is the sensitivity in LSB/°C as stated in the Electrical Specifications and T n is +25 °C.
It is recommended that temperature measurements be based on TEMP_RAW_X which is the sum of two
consecutive temperature readings, thus being higher by a factor of two than the raw sensor readings.
3.4
3.4.1
Temperature Compensation
Temperature Coefficients:
μV/°C ). TC1 (μV/°C) can be calculated for the individual chip from the contents of the TRIMT[7:0] I/O
Since TC1 and TC2 are given in μV/°C and μV/°C , respectively, the value of the VREF voltage
(1.195V) has to be taken into account when transitioning to PPM/°C and PPM/°C . This means
The internal voltage reference VREF is calibrated during device manufacture.
The temperature coefficient TC2 is given as a constant that represents typical component behavior (in
2
RAM register. TC1 and TC2 allow compensation for variations of the reference voltage to within ± 40
PPM/°C.
2
2
that PPMC = 26.84*TC1/1.195 and PPMC2 = 1374*TC2/1.195).
Close examination of the electrical specification (see Table 53) reveals that the achievable deviation is
not strictly ±40 PPM/°C over the whole temperature range: Only for temperatures for which T-22 > 40 (i.e.
T > 62°C) or for which T-22 < -40 (i.e. T < -18°C), the data sheet states ±40 PPM/°C. For temperatures
between -18°C and +62°C, the error should be considered constant at ±1,600 PPM, or ±0.16%.
Parameter
Condition
Min
Typ
VREF(T) deviation from VNOM(T)
VREF ( T ) ? VNOM ( T )
VNOM ( T )
10 6
max( T ? 22 , 40 )
-40
+40
PPM/oC
Table 53: VREF Definition for 6531
Figure 31 shows this concept graphically. The “box” from -18°C to +62°C reflects the fact that it is imprac-
tical to measure the temperature coefficient of high-quality references at small temperature excursions.
For example, at +25°C, the expected error would be ±3°C * 40 PPM/°C, or just 0.012%.
The maximum deviation of ±2520 PPM (or 0.252%) is reached at the temperature extremes. If the refer-
ence voltage is used to measure both voltage and current, the identical errors of ±0.252% add up to a
maximum Wh registration error of ±0.504%.
64
Rev 2
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71M6531F-IM/FR4 功能描述:计量片上系统 - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel
71M6531F-IMR/F 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel