参数资料
| 型号： | MCP3905EV |
| 厂商： | Microchip Technology |
| 文件页数： | 20/30页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO FOR MCP3905 |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | MCP3905/6 |
| 主要属性： | 1 相 120/220 VAC 板载无变压器 AC/DC 5V 电源 |
| 已供物品： | 板，CD |
| 产品目录页面： | 677 (CN2011-ZH PDF) |
| 相关产品： | MCP3905L-I/SS-ND - IC POWER METERING-1 PHASE 24SSOP MCP3905LT-I/SSTR-ND - IC POWER METERING-1 PHASE 24SSOP MCP3906AT-I/SS-ND - IC POWER METERING-1 PHASE 24SSOP MCP3905AT-I/SS-ND - IC POWER METERING-1 PHASE 24SSOP MCP3906A-I/SS-ND - IC POWER METERING-1 PHASE 24SSOP MCP3905A-I/SS-ND - IC POWER METERING-1 PHASE 24SSOP |
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MCP3905/06
The high-frequency output HF OUT
has lower
MINIMAL OUTPUT FREQUENCY FOR
integration times and, thus, higher frequencies. The
output frequency value can be calculated with the
following equation:
NO-LOAD THRESHOLD
The MCP3905/06 also includes, on each output
frequency, a no-load threshold circuit that will eliminate
EQUATION 4-2:
HF OUT FREQUENCY
OUTPUT EQUATION
any creep effects in the meter. The outputs will not
show any pulse if the output frequency falls below the
no-load threshold. The minimum output frequency on
8.06 × V 0 × V 1 × G × HF
2 C
HF OUT ( Hz ) = ---------------------------------------------------------------
( V REF )
Where:
V 0 = the RMS differential voltage on Channel 0
V 1 = the RMS differential voltage on Channel 1
G = the PGA gain on Channel 0
(current channel)
F C = the frequency constant selected
V REF = the voltage reference
The constant HF C depends on the F OUT0 and F OUT1
The detailed timings of the output pulses are described
“Electrical Characteristics” and Figure 1-1 ).
F OUT0/1 and HF OUT is equal to 0.0015% of the
maximum output frequency (respectively F C and HF C )
and Table 4-4 ); except when F2, F1, F0 = 011 . In this
last configuration, the no-load threshold feature is
disabled. The selection of F C will determine the start-up
current load. In order to respect the IEC standards
requirements, the meter will have to be designed to
allow start-up currents compatible with the standards
by choosing the FC value matching these
requirements. For additional applications information
on no-load threshold, startup current and other meter
design points, refer to AN994, "IEC Compliant Active
Energy Meter Design Using The MCP3905/6” ,
(DS00994).
TABLE 4-4:
OUTPUT FREQUENCY CONSTANT HF C FOR HF OUT (V REF = 2.4V)
F2
0
0
0
0
1
1
1
1
F1
0
0
1
1
0
0
1
1
F0
0
1
0
1
0
1
0
1
HF C
64 x F C
32 x F C
16 x F C
2048 x F C
128 x F C
64 x F C
32 x F C
16 x F C
HF C (Hz)
MCLK/2 15
MCLK/2 15
MCLK/2 15
MCLK/2 7
MCLK/2 16
MCLK/2 16
MCLK/2 16
MCLK/2 16
HF C (Hz)
(MCLK = 3.58 MHz)
109.25
109.25
109.25
27968.75
219.51
219.51
219.51
219.51
HF OUT Frequency (Hz) with
full-scale AC Inputs
27.21
27.21
27.21
6070.12
47.42
47.42
47.42
47.42
DS21948E-page 20
? 2009 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3905-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:* |
| MCP3905L | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Energy-Metering ICs with Active (Real) Power Pulse Output |
| MCP3905L-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 |
| MCP3905L-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 |
| 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 |
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