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參數(shù)資料
| 型號(hào)： | ADE7753ARSRL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Active and Apparent Energy Metering IC with di/dt sensor interface |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | MO-150AE, SSOP-20 |
| 文件頁數(shù)： | 16/38頁 |
| 文件大?。?/td> | 449K |
| 代理商： | ADE7753ARSRL |
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ADE7753
–16–
REV. PrF 10/02
PRELIMINARY TECHNICAL DATA
availability by going active low. T he timing is shown in
Figure 22. T he 24-bit waveform samples are transferred
from the ADE7753 one byte (8-bits) at a time, with the most
significant byte shifted out first. T he 24-bit data word is right
justified - see
ADE7753 Serial Interface
.
0 0 0
01 Hex
IRQ
DIN
DOUT
SCLK
Read from WAVEFORM
Channel 1 DATA - 24 bits
Sign
Figure 22 – Waveform sampling Channel 1
T he interrupt request output IRQ stays low until the interrupt
routine reads the Reset Status register -
see ADE7753 Interrupt
.
Channel 1 RMS calculation
Root Mean Square (RMS) value of a continuous signal V(t)
is defined as:
()
t
∫
=
T
rms
dt
V
T
V
0
2
1
(1)
For time sampling signals, rms calculation involves squaring
the signal, taking the average and obtaining the square root:
∑
=
i
=
rms
i
V
N
V
1
2
)
(
1
(2)
AD E7753 calculates simultaneously the RMS values for
Channel 1 and Channel 2 in different register. Figure 23
shows the detail of the signal processing chain for the RMS
calculation on channel 1. T he channel 1 RMS value is
processed from the samples used in the channel 1 waveform
sampling mode.
T he channel 1 RMS value is stored in an
unsigned 24-bit register (IRMS). One LSB of the channel 1
HPF
V1P
V1N
ADC 1
PGA1
x1, x2, x4,
x8, x16
REFERENCE
2.42V, 1.21V, 0.6V
V1
0V
Analog
Input
Range
0.5V, 0.25V,
0.125V, 62.5mV,
31.3mV, 15.6mV,
V1
000000h
2851ECh
D7AE14h
ADC Output
word Range
000000h
2851ECh
D7AE14h
Channel 1 (Current Waveform)
Data Range
ACTIVE AND REACTIVE
POWER CALCULATION
WAVEFORM SAMPLE
REGISTER
GAIN[2:0]
GAIN[4:3]
000000h
1EF73Ch
E108C4h
Channel 1 (Current Waveform)
Data Range After integrator (50Hz)
DIGITAL
INTEGRATOR*
∫
*WHEN DIGITAL INTEGRATOR IS ENABLED, FULL-SCALE OUTPUT DATA IS ATTENUATED
DEPENDING ON THE SIGNAL FREQUENCY BECAUSE THE INTEGRATOR HAS A -20dB/DECADE
FREQUENCY RESPONSE. WHEN DISABLED, THE OUTPUT WILL NOT BE FURTHER ATTENUATED.
000000h
19CE08h
E631F8h
Channel 1 (Current Waveform)
Data Range After Integrator (60Hz)
50Hz
60Hz
CURRENT RMS (IRMS)
CALCULATION
Figure 21 —ADC and signal processing in Channel 1
RMS register is equivalent to one L SB of a channel 1
waveform sample. T he update rate of the channel 1 RMS
measurement is C L K IN/4.
24
LPF3
Current Signal - i(t)
2851ECh
D7AE14h
00h
Irms(t)
1C82B3h
00h
IRMS
Channel 1
Σ
SIGN 2
25
2
26
2
27
2
17
2
16
2
15
IRMSOS[11:0]
24
HPF
Figure 23 - Channel 1 RMS signal processing
With the specified full scale analog input signal of 0.5V, the
ADC will produce an output code which is approximately
±2,642,412d—see
Channel 1 ADC
. T he equivalent RMS val-
ues of a full-scale AC signal is 1,868,467d (1C82B3h).
Channel 1 RMS offset compensation
T he ADE7753 incorporates a channel 1 RMS offset compen-
sation register (IRMSOS). T his is 12-bit signed registers
which can be used to remove offset in the channel 1 RMS
calculation. An offset may exist in the RMS calculation due
to input noises that are integrated in the DC component of
V
2
(t). T he offset calibration will allow the content of the
IRMS register to be maintained at zero when no input is
present on channel 1.
1 LSB of the Channel 1 RMS offset are equivalent to 32,768
LSB of the square of the Channel 1 RMS register. Assuming
that the maximum value from the Channel 1 RMS calcula-
tion is 1,868,467d with full scale AC inputs, then 1 LSB of
the channel 1 RMS offset represents 0.46% of measurement
error at -60dB down of full scale.
32768
2
0
×
+
=
IRMSOS
I
I
rms
rms
where I
rmso
is the RMS measurement without offset correc-
tion.
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| ADE7754AR | ADE7754 |
| ADE7754ARRL | ADE7754 |
| ADE7755AN-REF | Energy Metering IC with Pulse Output |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADE7753ARSZ | 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測(cè)量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
| ADE7753ARSZ | 制造商:Analog Devices 功能描述:ENERGY METERING IC |
| ADE7753ARSZ | 制造商:Analog Devices 功能描述:IC MULTIFUNCTION METER |
| ADE7753ARSZRL | 功能描述:IC ENERGY METERING 1PHASE 20SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 能量測(cè)量 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:* |
| ADE7753-ARSZRL | 制造商:Analog Devices 功能描述: |
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