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参数资料
| 型号： | 71M6511H-IGT/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 79/98页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER RESIDENT 64-LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 160 |
| 系列： | * |
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71M6511/71M6511H
Single-Phase Energy Meter IC
A Maxim Integrated Products Brand
DATA SHEET
NOVEMBER 2010
When applying the inverted coefficients, a curve (see Figure 30) will result that effectively neutralizes the original crystal
characteristics. The frequencies were calculated using the fit coefficients as follows:
f = f nom ? ? 1 +
?
?
?
a
10
6
+ T
b
10
6
+ T 2
c ?
10 6 ?
32768.5
32768.4
32768.3
32768.2
32768.1
32768
32767.9
32767.8
32767.7
32767.6
32767.5
crystal
curve fit
inverse curve
-50
-25
0
25
50
Figure 30: Crystal Compensation
The MPU Demo Code supplied with the TERIDIAN Demo Kits has a direct interface for these coefficients and it directly con-
trols the RTC_DEC_SEC or RTC_INC_SEC registers. The Demo Code uses the coefficients in the following form:
CORRECTION ( ppm ) =
Y _ CAL
10
+ T ?
Y _ CALC
100
+ T 2 ?
Y _ CALC 2
1000
Note that the coefficients are scaled by 10, 100, and 1000 to provide more resolution. For our example case, the coefficients
would then become (after rounding, since the Demo Code accepts only integers):
Y_CAL = 109, Y_CALC = 12, Y_CALC2 = 7
Alternatively, the mains frequency may be used to stabilize or check the function of the RTC. For this purpose, the CE
provides a count of the zero crossings detected for the selected line voltage in the MAIN_EDGE_X address. This count is
equivalent to twice the line frequency, and can be used to synchronize and/or correct the RTC.
External Temperature Compensation
In a production electricity meter, the 71M6511 or 71M6511H is not the only component contributing to temperature de-
pendency. In fact, a whole range of components (e.g. current transformers, resistor dividers, power sources, filter capacitors)
will exhibit slight or pronounced temperature effects. Since the output of the on-chip temperature sensor is accessible to the
MPU, temperature-compensation mechanisms with great flexibility, i.e. beyond the capabilities implemented in the CE, are
possible.
Temperature Measurement
Temperature measurement can be implemented with the following steps:
1)
2)
3)
At a known temperature T N , read the TEMP_RAW register of the CE and write the value into TEMP_NOM .
Read the TEMP_X register at the known temperature. The obtained value should be < ± 0.1°C.
The temperature T (in °C) at any environment can be obtained by reading TEMP_X and applying the following
formula:
T = T N +
TEMP _ X
10
Page: 79 of 98
? 2005–2010 Teridian Semiconductor Corporation
V2.7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6511H-IGTR | 制造商:Maxim Integrated Products 功能描述:RESID. HI PRECISION METR (1P, .1%) - Tape and Reel |
| 71M6511H-IGTR/F | 功能描述:计量片上系统 - SoC Highly Integrated SoC w/MCU Core 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 |
| 71M6511-IGT | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Single-Phase Energy Meter IC |
| 71M6511-IGT/F | 功能描述:计量片上系统 - SoC Highly Integrated SoC w/MCU Core 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 |
| 71M6511-IGT/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 |
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