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参数资料
| 型号： | 71M6513H-IGTR/F |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 封装： | LEAD FREE, LQFP-100 |
| 文件页数： | 2/104页 |
| 文件大小： | 1390K |
| 代理商： | 71M6513H-IGTR/F |
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71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
AUGUST 2011
Page: 10 of 104
2005-2011 Teridian Semiconductor Corporation
A Maxim Integrated Products Brand
The MUX_ALT bit requests an alternate multiplexer cycle. The bit may be asserted on any MPU cycle and may be sub-
sequently de-asserted on any cycle including the next one. A rising edge on MUX_ALT will cause the Control Circuit to wait
until the next multiplexer cycle and implement a single alternate cycle.
Multiplexer Control Circuit also controls the FIR filter initiation and the chopping of the ADC reference voltage, VREF. The
Multiplexer Control Circuit is clocked by CK32, the 32768Hz clock from the PLL block, and launches each pass through the CE
program.
ADC
A single 21/22-bit delta-sigma A/D converter digitizes the power inputs to the AFE. The resolution of the ADC is programmable
using the I/O RAM register FIR_LEN register (0x2005[4]). ADC resolution may be selected to be 21 bits (FIR_LEN=0), or 22
bits (FIR_LEN=1). Conversion time is two cycles of CK32 with FIR_LEN = 0 and three cycles with FIR_LEN = 1.
Accuracy, timing and functional specifications in this data sheet are based on FIR_LEN = 0 (two CK32 cycles).
Initiation of each ADC conversion is controlled by the Multiplexer Control Circuit as described previously.
FIR Filter
The finite impulse response (FIR) filter is an integral part of the ADC and it is optimized for use with the multiplexer. The
purpose of the FIR is to decimate the ADC output to the desired resolution. At the end of each ADC conversion, the output
data of the FIR filter (raw data) is stored into the CE DRAM location determined by the multiplexer selection. The location of
the raw data in the CE DRAM is specified in the CE Program and Environment Section.
Voltage Reference
The 71M6513/6513H includes an on-chip precision bandgap voltage reference that incorporates auto-zero techniques. The
reference of the 71M6513H is trimmed in production to minimize errors caused by component mismatch and drift. The result is
a voltage output with a predictable temperature coefficient.
The voltage reference is chopper stabilized, i.e. the polarity can be switched by the MPU using the I/O RAM register CHOP_EN
(0x2002[5:4]). The two bits in the CHOP_EN register enable the MPU to operate the chopper circuit in regular or inverted
operation, or in “toggling” mode. When the chopper circuit is toggled in between multiplexer cycles, DC offsets on the
measured signals will automatically be averaged out.
The general topology of a chopped amplifier is given in Figure 2.
Figure 2: General Topology of a Chopped Amplifier
It is assumed that an offset voltage Voff appears at the positive amplifier input. With all switches, as controlled by CROSS in
the “A” position, the output voltage is:
Voutp – Voutn = G (Vinp + Voff – Vinn) = G (Vinp – Vinn) + G Voff
G
-
+
V
inp
V
outp
V
outn
V
inn
CROSS
A
B
A
B
A
B
A
B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6513-IEL | 制造商:未知厂家 制造商全称:未知厂家 功能描述:71M6513 |
| 71M6513-IEL/F | 功能描述:计量片上系统 - SoC 3-Phase Energy Meter I/C 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 |
| 71M6513-IELR/F | 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC 3-Phase Energy Meter I/C |
| 71M6513-IGT/F | 功能描述:计量片上系统 - SoC 3-Phase Energy Meter I/C 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 |
| 71M6513-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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