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| 型号： | MCP3905L-I/SS |
| 厂商： | Microchip Technology |
| 文件页数： | 15/30页 |
| 文件大小： | 0K |
| 描述： | IC POWER METERING-1 PHASE 24SSOP |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 59 |
| 输入阻抗： | 390 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 2.4V |
| 电压 - 低输入/输出： | 0.85V |
| 电流 - 电源： | 2.7mA |
| 电源电压： | 4.5 V ~ 5.5 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 677 (CN2011-ZH PDF) |
| 配用： | MCP3905RD-PM1-ND - REFERENCE DESIGN FOR MCP3905 MCP3905EV-ND - BOARD DEMO FOR MCP3905 |
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MCP3905/06
4.0
DEVICE OVERVIEW
The instantaneous power signal contains the real-
power information; it is the DC component of the
The MCP3905/06 is an energy-metering IC that
supplies a frequency output proportional to active (real)
power, and higher frequency output proportional to the
instantaneous power for meter calibration. Both
channels use 16-bit, second-order, delta-sigma ADCs
that oversample the input at a frequency equal to
MCLK/4, allowing for wide dynamic range input signals.
A Programmable Gain Amplifier (PGA) increases the
usable range on the current input channel (Channel 0).
The calculation of the active (real) power, as well as the
filtering associated with this calculation, is performed in
the digital domain, ensuring better stability and drift
performance. Figure 4-1 represents the simplified
block diagram of the MCP3905/06, detailing its main
signal-processing blocks.
Two digital high-pass filters cancel the system offset on
both channels such that the real-power calculation
does not include any circuit or system offset. After
being high-pass filtered, the voltage and current signals
are multiplied to give the instantaneous power signal.
This signal does not contain the DC offset components,
such that the averaging technique can be efficiently
used to give the desired active (real) power output.
instantaneous power. The averaging technique can be
used with both sinusoidal and non-sinusoidal
waveforms, as well as for all power factors. The
instantaneous power is thus low-pass filtered in order
to produce the instantaneous real-power signal.
A DTF converter accumulates the instantaneous active
(real) power information to produce output pulses with a
frequency proportional to the average active (real)
power. The low-frequency pulses presented at the
F OUT0 and F OUT1 outputs are designed to drive
electromechanical counters and two-phase stepper
motors displaying the real-power energy consumed.
Each pulse corresponds to a fixed quantity of real
energy, selected by the F2, F1 and F0 logic settings. The
HF OUT output has a higher frequency setting and lower
integration period such that it can represent the
instantaneous active (real) power signal. Due to the
shorter accumulation time, it enables the user to
proceed to faster calibration under steady load
CH0+
CH0-
+
–
MCP3905/06
PGA
ΔΣ ADC
HPF
F OUT0
ANALOG
DIGITAL
X
LPF
.. 0 1 0 1 ...
DTF
F OUT1
HF OUT
CH1+
CH1-
+
–
Frequency
Content
ΔΣ ADC
HPF
0
Input Signal
with System
Offset and
0
ADC Output
Code Contains
System and
0
DC Offset
Removed
by HPF
0
Instantaneous
Power
0
Instantaneous
Active (Real) Power
Line Frequency
ADC Offset
FIGURE 4-1:
Simplified MCP3905/06 Block Diagram with Frequency Contents.
? 2009 Microchip Technology Inc.
DS21948E-page 15
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相关代理商/技术参数 |
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| MCP3905LT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Energy-Metering ICs with Active (Real) Power Pulse Output |
| MCP3905LT-E/SS | 功能描述:模数转换器 - ADC Energy Meter IC Gain Dynamic Range RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3905LT-I/SS | 功能描述:模数转换器 - ADC Dynamic Range Energy Meter IC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3905RD-PM1 | 功能描述:电源管理IC开发工具 Energy Meter Ref Design RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MCP3905T-I/SS | 功能描述:IC ENERGY METER 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:* |
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