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參數(shù)資料
型號(hào)： 71M6511-IGTR
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64
封裝： LQFP-64
文件頁(yè)數(shù)： 50/98頁(yè)
文件大小： 1278K
代理商： 71M6511-IGTR
71M6511/71M6511H
Single-Phase Energy Meter IC
DATA SHEET
NOVEMBER 2010
Page: 54 of 98
2005–2010 Teridian Semiconductor Corporation
V2.7
A Maxim Integrated Products Brand
Accumulation Interval m
MUX
cycle n
MUX
cycle 2
MUX
cycle 3
Chop Polarity
Positive
Re-
versed
Re-
versed
Re-
versed
Re-
versed
MUX
cycle n
MUX
cycle 1
MUX
cycle 1
MUX
cycle 1
Accumulation Interval m+1
CE_BUSY interrupt
(falling edge)
XFER_BUSY interrupt
(falling edge)
Accumulation Interval m+2
Positive
Re-
versed
Figure 21: Chop Polarity w/ Automatic Chopping
If temperature compensation or accurate reading of the die temperature is required, alternate multiplexer cycles have to be
inserted in between the regular cycles. This is done under MPU firmware control by asserting the MUX_ALT bit whenever
necessary. Since die temperature usually changes very slowly, alternate multiplexer cycles have to be inserted very
infrequently. Usually, an alternate multiplexer cycle is inserted once for every accumulation period, i.e. after each
XFER_BUSY interrupt. This sequence is shown in Figure 22.
Accumulation Interval m
MUX
cycle n
MUX
cycle 2
MUX
cycle 3
Chop Polarity
Positive
Re-
versed
Re-
versed
Re-
versed
Re-
versed
MUX
cycle n
Accumulation Interval m+1
alt. MUX
cycle
alt. MUX
cycle
alt. MUX
cycle
CE_BUSY interrupt
XFER_BUSY interrupt
Accumulation Interval m+2
Positive
Re-
versed
MUX_ALT
Figure 22: Sequence with Alternate Multiplexer Cycles
This sequence has the disadvantage that the alternate multiplexer cycle is always operated with positive connection.
Consequently, DC offset will appear on the temperature measurement, which will decrease the accuracy of this measurement
and thus cause temperature reading and compensation to be less accurate.
The sequence shown in Figure 23 uses the CHOP_EN bits to control the chopper polarity after each XFER_BUSY interrupt.
CHOP_EN is controlled to alternate between 10 (positive) and 01 (reversed) for the first multiplexer cycle following each
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
71M6511-IGTR/F 功能描述:計(jì)量片上系統(tǒng) - SoC Highly Integrated SoC w/MCU Core RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類(lèi)型:Metering SoC 最大時(shí)鐘頻率:70 Hz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:7 KB 接口類(lèi)型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel
71M6511-IGTR/F1 功能描述:計(jì)量片上系統(tǒng) - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類(lèi)型:Metering SoC 最大時(shí)鐘頻率:70 Hz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:7 KB 接口類(lèi)型:UART 可編程輸入/輸出端數(shù)量:12 片上 ADC: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel
71M6512-DB 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6512 Demo Brd
71M6512-IM/F 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Meter Extended Io
71M6512-IMR/F 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Meter Extended Io
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