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| 型號(hào)： | 71M6515H-IGTW/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP64 |
| 封裝： | LEAD FREE, LQFP-64 |
| 文件頁數(shù)： | 30/60頁 |
| 文件大?。?/td> | 826K |
| 代理商： | 71M6515H-IGTW/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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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| 71M6515H-IGTWR1 | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Up to 10ppmC precision ultra-stable voltage reference Digital temperature compensation |
| 71M6521BE | 制造商:TERIDIAN 制造商全稱:TERIDIAN 功能描述:Energy Meter IC |
| 71M6521BE-DB | 制造商:Maxim Integrated Products 功能描述:Development Boards & Kits - 8051 71M6521BE Demo Brd |
| 71M6521BE-IGT/F | 功能描述:計(jì)量片上系統(tǒng) - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型: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 |
| 71M6521BE-IGT/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 |
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