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参数资料
| 型号： | 71M6515H-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, PQFP64 |
| 封装： | LEAD FREE, LQFP-64 |
| 文件页数： | 30/60页 |
| 文件大小： | 826K |
| 代理商： | 71M6515H-IGT/F |
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71M6515H
Energy Meter IC
DATA SHEET
JULY 2011
Page: 36 of 60
2005
2011 Teridian Semiconductor Corporation
1.6
A Maxim Integrated Products Brand
Registers Used for Calibration
CAL_IA (0x24), CAL_VA (0x25), CAL_IB (0x26), CAL_VB (0x27), CAL_IC (0x28), CAL_VC (0x29):
These registers adjust the gain for the current and voltage measurements of each phase for the purpose of calibration. The
calibration factors have to be stored by the host and written to the registers of the 71M6515H after power-up. The allowed
range is (2
15 – 1) to –(215 – 1). The default value of 16384 equals unity gain.
If a voltage measurement of phase C is higher than expected, CAL_VC has to be adjusted to:
CAL_VC = 16384 / (1 + error)
Error must be expressed as a fraction, not a percentage value.
If the percent error is +3.5%, the relative error is 0.035, and the calibration factor becomes:
CAL_VC = 16384 / (1 + 0.035) = 15829.952,
which is rounded up to15830.
KVAR (0x2F)
This register holds the relative gain of the VAR calculation with respect to the Watt calculation. The value should always be
6444.
PHADJ_A (0x2A), PHADJ_B (0x2B), PHAD_C (0x2C)
These registers hold the phase correction factors for channels A, B, and C. The values are used by the CE to compensate
for phase errors induced by current transformers. The allowed range is (2
15-1) to -(215-1). See the Calibration Procedure
section for applicable values.
If the CE is operated in Rogowski Coil mode, no phase compensation should be required. The default value is not zero and
should need to be changed only slightly, if at all. See the Calibration section for details.
QUANT_W (0x36), QUANT_VAR (0x37), QUANT_I (0x38)
These registers hold DC values that are added to each calculated product in order to compensate for internal quantization
(a very small amount) and external noise. These values are normally set to zero. The LSB values for these variable are
listed in Table 7.
Variable
LSB Value
Unit
QUANT_W
(VMAX IMAX/ In_8)* 1.04173*10
-9
W
QUANT_VAR
(VMAX IMAX / In_8)* 1.04173*10
-9
VAR
QUANT_I
(IMAX
2 / In_82)* 5.08656*10-13
A (rms)
Table 7: LSB Values for QUANT Variables
Nonlinearity is most noticeable at low currents, and can result from input noise and truncation. Nonlinearities can be
eliminated using the QUANT_W register. The error can be seen as the presence of a virtual constant noise current that
becomes dominant at small load currents.
The value to be used for QUANT_W can be determined by the following formula:
LSB
IMAX
VMAX
In
I
V
error
W
QUANT
=
8
_
100
_
Where error = observed error at a given voltage (V) and current (I),
VMAX = voltage scaling factor, as described in section Scaling of Measured Values
IMAX = current scaling factor, as described in section Scaling of Measured Values
LSB = QUANT LSB value = 1.04173*10
-9W
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6515H-IGTR | 制造商:Maxim Integrated Products 功能描述:71M6515H-IGT - T/REEL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Energy Meter IC |
| 71M6515H-IGTR/F | 功能描述:计量片上系统 - SoC Energy Meter IC 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-IGTW/F | 功能描述:计量片上系统 - SoC Energy Meter IC 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-IGTW1 | 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-IGTWR1 | 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 |
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