参数资料
型号: 71M6541F-IGTR/F
厂商: Maxim Integrated
文件页数: 12/166页
文件大小: 0K
描述: IC ENERGY METER SGL PHSE 64LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
系列: Single Converter Technology®
输入阻抗: 40 千欧 ~ 90 千欧
测量误差: 0.5%
电压 - 高输入/输出: 2V
电压 - 低输入/输出: 0.8V
电流 - 电源: 4mA
电源电压: 3 V ~ 3.6 V
测量仪表类型: 单相
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: 标准包装
其它名称: 71M6541F-IGTR/FDKR
71M6541D/F/G and 71M6542F/G Data Sheet
transformers (CTs) and their corresponding signal conditioning circuits can be characterized and their
correction factors can be programmed to produce electricity meters with exceptional accuracy over the
industrial temperature range.
One of the two internal UARTs is adapted to support an Infrared LED with internal drive and sense configuration
and can also function as a standard UART. The optical output can be modulated at 38 kHz. This flexibility
makes it possible to implement AMR meters with an IR interface. A block diagram of the IC is shown in
2.2
Analog Front End (AFE)
The AFE functions as a data acquisition system, controlled by the MPU. When used with locally
connected sensors, as seen in Figure 2 , the analog input signals (IAP-IAN, VA and IBP-IBN) are
multiplexed to the ADC input and sampled by the ADC. The ADC output is decimated by the FIR filter
and stored in CE RAM where it can be accessed and processed by the CE.
See Figure 6 for the multiplexer sequence corresponding to Figure 2 . See Figure 35 for the meter
configuration corresponding to Figure 2 .
VREF
I LINE
I LINE
IAP
MUX
?Σ ADC
CT
or
Local
Shunt
IAN
VREF
VADC
CONVERTER
VREF
FIR
22
CE RAM
VADC10 (VA)
IN*
IBP
CT
IBN
71M6541D/F
12
*IN = Optional Neutral Current
Figure 2. 71M6541D/F/G AFE Block Diagram (Local Sensors)
11/5/2010
Rev 4
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