- 您现在的位置：买卖IC网 > PDF目录4596 > ADE7518ASTZF16 (Analog Devices Inc)IC ENERGY METER MCU 16K 64LQFP PDF资料下载
参数资料
| 型号： | ADE7518ASTZF16 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 48/128页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER MCU 16K 64LQFP |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 特色产品： | ADE7518: Single-phase Energy-Measurement IC |
| 标准包装： | 160 |
| 输入阻抗： | * |
| 测量误差： | * |
| 电压 - 高输入/输出： | * |
| 电压 - 低输入/输出： | * |
| 电流 - 电源： | * |
| 电源电压： | * |
| 测量仪表类型： | * |
| 工作温度： | * |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 托盘 |
| 产品目录页面： | 797 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页当前第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页
ADE7518
Voltage Channel RMS Calculation
Figure 50 shows details of the signal processing chain for the
rms calculation on the voltage channel. The voltage channel
rms value is processed from the samples used in the voltage
where:
v is the rms voltage.
i is the rms current.
p ( t ) = v ( t ) × i ( t )
channel waveform sampling mode and is stored in the unsigned
24-bit V rms register.
p ( t ) = VI ? VI cos( 2 ω t )
(8)
The update rate of the voltage channel rms measurement is
MCLK/5. To minimize noise in the reading of the register, the
The average power over an integral number of line cycles (n) is
given by the expression in Equation 9.
∫ 0
V rms register can also be configured to update only with the
zero crossing of the voltage input. This configuration is done
P =
1
nT
nT
p ( t ) dt = VI
(9)
by setting the ZXRMS bit in the MODE2 register (0x0C).
With the specified full-scale ac analog input signal of 0.4 V, the
output from the LPF1 in Figure 50 swings between 0x28F5 and
0xD70B at 60 Hz (see the Voltage Channel ADC section). The
equivalent rms value of this full-scale ac signal is approximately
0d1,898,124 (0x1CF68C) in the V rms register. The voltage rms
measurement provided in the ADE7518 is accurate to within
±0.5% for signal input between full scale and full scale/20.
The conversion from the register value to volts must be done
externally in the microprocessor using a V/LSB constant.
Voltage Channel RMS Offset Compensation
where:
T is the line cycle period.
P is referred to as the active or real power.
Note that the active power is equal to the dc component of the
instantaneous power signal p(t) in Equation 9, that is, VI. This
is the relationship used to calculate active power in the ADE7518.
The instantaneous power signal p(t) is generated by multiplying the
current and voltage signals. The dc component of the instantaneous
power signal is then extracted by LPF2 (low-pass filter) to obtain
the active power information. This process is illustrated in
Figure 49.
The ADE7518 incorporates a voltage channel rms offset compensa-
INSTANTANEOUS
POWER SIGNAL
p(t) = v × i – v × i × cos(2 ω t)
tion register (VRMSOS). This is a 12-bit signed register that can
be used to remove offset in the voltage channel rms calculation.
An offset can exist in the rms calculation due to input noises
and dc offset in the input samples. One LSB of the voltage
channel rms offset is equivalent to 64 LSBs of the rms register.
Assuming that the maximum value from the voltage channel
rms calculation is 0d1,898,124 with full-scale ac inputs, then
1 LSB of the voltage channel rms offset represents 3.37% of
measurement error at ?60 dB down from full scale.
0x19999A
VI
0xCCCCD
0x00000
ACTIVE REAL POWER
SIGNAL = v × i
V rms = V rms0 + 64 × VRMSOS
(5)
CURRENT
i(t) = √ 2 × i × sin( ω t)
where V rms0 is the rms measurement without offset correction.
ACTIVE POWER CALCULATION
Active power is defined as the rate of energy flow from source
to load. It is the product of the voltage and current waveforms.
The resulting waveform is called the instantaneous power signal
and is equal to the rate of energy flow at every instant of time.
The unit of power is watt or joules/second. Equation 8 gives an
expression for the instantaneous power signal in an ac system.
v ( t ) = 2 × V sin( ω t ) (6)
VOLTAGE
v(t) = √ 2 × v × sin( ω t)
Figure 49. Active Power Calculation
Because LPF2 does not have an ideal brick wall frequency response
(see Figure 51), the active power signal has some ripple due to
the instantaneous power signal. This ripple is sinusoidal and
has a frequency equal to twice the line frequency. Because of its
sinusoidal nature, the ripple is removed when the active power
signal is integrated to calculate energy (see the Active Energy
Calculation section).
i ( t ) = 2 × I sin( ω t )
(7)
VOLTAGE SIGNAL (V(t))
0x28F5
VRMSOS[11:0]
0x00
VOLTAGE CHANNEL
LPF1
0x0
0xD70B
LPF3
sgn 2 16 2 15
+
2 8 2 7 2 6
VRMSx[23:0]
0x28F5C2
+
Figure 50. Voltage Channel RMS Signal Processing
Rev. 0 | Page 48 of 128
相关PDF资料 |
PDF描述 |
|---|---|
| ADE7156ASTZF8 | IC ENERGY METER 64-LQFP |
| ADE7156ASTZF16-RL | IC ENERGY METER 64-LQFP |
| ADE7116ASTZF8-RL | IC ENERGY METER 64-LQFP |
| ADE7116ASTZF8 | IC ENERGY METER 64-LQFP |
| ADE5166ASTZF62-RL | IC METER/8052/RTC/LCD DRV 64LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7518ASTZF16-RL | 功能描述:IC ENERGY METER MCU 16K 64LQFP 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:* |
| ADE7518ASTZF8 | 功能描述:IC ENERGY METER MCU 8K 64LQFP 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:* |
| ADE7518ASTZF8-RL | 功能描述:IC ENERGY METER MCU 8K 64LQFP 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:* |
| ADE7566 | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
| ADE7566ACPZF16 | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
发布紧急采购，3分钟左右您将得到回复。