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| 型号： | 71M6521DE-IGT/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 61/107页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER 16K FLASH 64LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 160 |
| 系列： | Single Converter Technology® |
| 测量误差： | 0.4% |
| 电源电压： | 3 V ~ 3.6 V |
| 测量仪表类型： | 单相，双相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 管件 |
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71M6521DE/DH/FE Data Sheet
Temperature Measurement
Measurement of absolute temperature uses the on-chip temperature sensor while 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.
Example: At 25°C a temperature sensor value of 518,203,584 (N n ) is read by the ADC by a 71M6521FE in the 64-pin
LQFP package. At an unknown temperature T the value 449.648.000 is read at (N(T)). The absolute temperature is
then determined by dividing both N n and N(T) by 512 to account for the 9-bit shift of the ADC value and then inserting
the results into the above formula, using –2220 for LSB/°C:
T =
449.648.00 0 - 518,203,58 4
512 ? ( ? 2220 )
+ 25 C = 85 . 3 ° C
component behavior (in μV/°C and μV/°C , respectively).
to be taken into account when transitioning to PPM/°C and PPM/°C . This means that PPMC =
It is recommended to base temperature measurements 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.
Temperature Compensation
Temperature Coefficients: The internal voltage reference is calibrated during device manufacture.
For the 71M6521DE/FE, the temperature coefficients TC1 and TC2 are given as constants that represent typical
2
For the 71M6521DH, the temperature characteristics of the chip are measured during production and then stored in
the fuse registers TRIMBGA, TRIMBGB , TRIMT and TRIMM[2:0] . TC1 and TC2 can be derived from the fuses by using
the relations given in the Electrical Specifications section.
Since TC1 and TC2 are given in μV/°C and μV/°C 2 , respectively, the value of the VREF voltage (1.195 V) has
2
26.84*TC1/1.195, and PPMC2 = 1374*TC2/1.195.
Close examination of the electrical specification (see Table 61) for the parts with regular accuracy 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%.
Similar considerations apply to the high-accuracy parts (see Table 62), where the error around the calibration
temperature should be considered constant at ±800 PPM, or ±0.08%.
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 61: VREF Definition for the Regular Accuracy Parts
Rev 3
Page: 61 of 107
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6521DE-IGTR/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 |
| 71M6521DE-IGTR/F1 | 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 |
| 71M6521DE-IM/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 |
| 71M6521DEIM-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6521DE Demo Brd |
| 71M6521DE-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 |
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