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| 型号： | 71M6513-IGT/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： | 56/104页 |
| 文件大小： | 1390K |
| 代理商： | 71M6513-IGT/F |
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71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
SEPTEMBER 2011
2005-2011 Teridian Semiconductor Corporation
Page: 55 of 104
A Maxim Integrated Products Brand
Temperature Compensation
Internal Compensation: The internal voltage reference is calibrated during device manufacture. Trim data is stored in on-chip
fuses.
For the 71M6513, the temperature coefficients TC1 and TC2 are given as constants that represent typical component
behavior.
For the 71M6513H, the temperature characteristics of the chip are measured during production and then stored in the fuse
registers TRIMBGA, TRIMBGB and TRIMM[2:0]. TC1 and TC2 can be derived from the fuses by using the relations given in the
Electrical Specifications section. TC1 and TC2 can be further processed to generate the coefficients PPMC and PPMC2.
TRIMM[2:0], TRIMBGA and TRIMBGB are read by first writing either 4, 5 or 6 to TRIMSEL (0x20FD) and then reading the value
of TRIM (0x20FF).
When the EXT_TEMP register in CE DRAM (address 0x38) is set to 0, the CE automatically compensates for temperature
errors by controlling the GAIN_ADJ register (address 0x2E) based on the PPMC, PPMC2, and TEMP_X register values. In the
case of internal compensation, GAIN_ADJ is an output of the CE.
External Compensation: Rather than internally compensating for the temperature variation, the bandgap temperature is
provided to the embedded MPU, which then may digitally compensate the power outputs. This permits a system-wide
temperature correction over the entire system rather than local to the chip. The incorporated thermal coefficients may include
the current sensors, the voltage sensors, and other influences. Since the band gap is chopper stabilized via the CHOP_EN bits,
the most significant long-term drift mechanism in the voltage reference is removed.
When the EXT_TEMP register in CE DRAM is set to 15, the CE ignores the PPMC, PPMC2, and TEMP_X register values and
applies the gain supplied by the MPU in GAIN_ADJ. External compensation enables the MPU to control the CE gain based on
any variable, and when EXT_TEMP = 15, GAIN_ADJ is an input to the CE.
Chopping Circuitry
As explained in the hardware section, the bits of the I/O RAM register CHOP_EN[1:0] have to be toggled in between
multiplexer cycles to achieve the desired elimination of DC offset.
The amplifier within the reference is auto-zeroed by means of an internal signal that is controlled by the CHOP_EN bits. When
this signal is HIGH, the connection of the amplifier inputs is reversed. This preserves the overall polarity of the amplifier gain
but inverts the input offset. By alternately reversing the connection, the offset of the amplifier is averaged to zero. The two bits
of the CHOP_EN register have the function specified in Table 60.
CHOP_EN[1]
CHOP_EN[0]
Function
0
Toggle chop signal
0
1
Reference connection positive
1
0
Reference connection reversed
1
Toggle chop signal
Table 60: CHOP_EN Bits
For automatic chopping, the CHOP_EN bits are set to either 00 or 11. In this mode, the polarity of the signals feeding the
reference amplifier will be automatically toggled for each multiplexer cycle as shown in Figure 21. With an even number of
multiplexer cycles in each accumulation interval, the number of cycles with positive reference connection will equal the number
of cycles with reversed connection, and the offset for each sampled signal will be averaged to zero. This sequence is
acceptable when only the primary signals (meter voltage, meter current) are of interest.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6513-IGTR/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-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 |
| 71M6515H | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Energy Meter IC |
| 71M6515H_11 | 制造商:TERIDIAN 制造商全称:TERIDIAN 功能描述:Up to 10ppmC precision ultra-stable voltage reference Digital temperature compensation |
| 71M6515H-DB | 功能描述:开发板和工具包 - 8051 71M6515H Demo Brd RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压: |
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