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PDF ADE7953 Data sheet ( Hoja de datos )
| Número de pieza | ADE7953 | |
| Descripción | Multifunction Metering IC | |
| Fabricantes | Analog Devices | |
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Data Sheet
Single Phase, Multifunction Metering IC
with Neutral Current Measurement
ADE7953
FEATURES
The device incorporates three Σ-Δ ADCs with a high accuracy
Measures active, reactive, and apparent energy; sampled
waveform; current and voltage rms
Provides a second current input for neutral current
measurement
Less than 0.1% error in active and reactive energy
measurements over a dynamic range of 3000:1
Less than 0.2% error in instantaneous IRMS measurement
over a dynamic range of 1000:1
energy measurement core. The second input channel simulta-
neously measures neutral current and enables tamper detection
and neutral current billing. The additional channel incorporates
a complete signal path that allows a full range of measurements.
Each input channel supports independent and flexible gain stages,
making the device suitable for use with a variety of current sensors
such as current transformers (CTs) and low value shunt resistors.
Two on-chip integrators facilitate the use of Rogowski coil sensors.
Provides apparent energy measurement and instantaneous
The ADE7953 provides access to on-chip meter registers via a
power readings
variety of communication interfaces including SPI, I2C, and UART.
1.23 kHz bandwidth operation
Two configurable low jitter pulse output pins provide outputs that
Flexible PGA gain stage (up to ×22)
Includes internal integrators for use with Rogowski coil sensors
SPI, I2C, or UART communication
are proportional to active, reactive, or apparent energy, as well as
current and voltage rms. A full range of power quality information
such as overcurrent, overvoltage, peak, and sag detection are
GENERAL DESCRIPTION
The ADE7953 is a high accuracy electrical energy measurement
IC intended for single phase applications. It measures line voltage
and current and calculates active, reactive, and apparent energy,
as well as instantaneous rms voltage and current.
accessible via the external IRQ pin. Independent active, reactive,
and apparent no-load detections are included to prevent “meter
creep.” Dedicated reverse power (REVP), zero-crossing voltage
(ZX), and zero-crossing current (ZX_I) pins are also provided. The
ADE7953 energy metering IC operates from a 3.3 V supply voltage
and is available in a 28-lead LFCSP package.
FUNCTIONAL BLOCK DIAGRAM
REF
RESET
VDD
VINTA
VINTD
1.2V REF
LOW
NOISE
PRE-AMP
IAP
PGA
IAN
ADC
AIGAIN
APHCAL VGAIN
HPF
DIGITAL
INTEGRATOR
VP
PGA
VN
ADC
IBP
PGA
IBN
ADC
HPF
ACTIVE, REACTIVE AND
APPARENT ENERGIES AND
VOLTAGE/CURRENT RMS
CALCULATION FOR PHASE B
(SEE PHASE A FOR DETAILED
DATA PATH).
AIRMSOS
X2 LPF
AIRMS
AVAGAIN
ADE7953
X2 LPF
AVRMS
VRMSOS
AWGAIN AWATTOS
LPF
COMPUTATIONAL
BLOCK FOR TOTAL
REACTIVE POWER
AVARGAIN AVAROS
PHASE
A AND B
DATA
CF1DEN
DFC :
CF2DEN
DFC :
CF1
CF2
AGND
DGND
CONFIGURATION
AND CONTROL
UART
SPI INTERFACE
REVP
ZX
ZX_I
REVP
ZX
ZX_I
PEAK
I2C ANGLE
POWER FACTOR
SAG
CLKIN CLKOUT
IRQ CS
Figure 1.
MISO/
SDA/Tx
MOSI/
SCL/Rx
SCLK
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
1 page  
Data Sheet
Parameter
ANALOG PERFORMANCE
Signal-to-Noise Ratio
Current Channel A
Current Channel B
Voltage Channel
Signal-to-Noise-and-Distortion Ratio
Current Channel A, Current Channel B
Voltage Channel
Bandwidth (−3 dB)
CF1 AND CF2 PULSE OUTPUTS
Maximum Output Frequency
Duty Cycle
Active Low Pulse Width
Jitter
Output High Voltage, VOH
Output Low Voltage, VOL
REFERENCE
REF Input Voltage Range
Input Capacitance
Reference Error
Output Impedance
Temperature Coefficient
CLKIN/CLKOUT PINS
Input Clock Frequency
Crystal Equivalent Series Resistance
LOGIC INPUTS—RESET, CLKIN, CS, SCLK,
MOSI/SCL/Rx, MISO/SDA/Tx
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
MOSI/SCL/Rx, MISO/SDA/Tx, RESET
CS, SCLK
Input Capacitance, CIN
LOGIC OUTPUTS—IRQ, REVP, ZX, ZX_I,
CLKOUT, MOSI/SCL/Rx, MISO/SDA/Tx
Output High Voltage, VOH
Output Low Voltage, VOL
POWER SUPPLY
VDD
Min
2.4
1.19
1.2
30
2.4
3.0
3.0
IDD
Typ Max
74
72
70
68
65
1.23
206.9
50
80
0.04
1.2
±0.9
10
0.4
1.21
10
50
3.58
200
0.8
−10
1
10
0.4
3.6
79
ADE7953
Unit Test Conditions/Comments
dB
dB
dB
dB
kHz
kHz
%
ms
%
V
V
V
pF
mV
kΩ
ppm/°C
MHz
Ω
CF1 or CF2 frequency > 6.25 Hz
CF1 or CF2 frequency < 6.25 Hz
CF1 or CF2 frequency = 1 Hz
ISOURCE = 500 μA at 25°C
ISINK = 8 mA at 25°C
Nominal 1.2 V at REF pin
TMIN to TMax
TA = 25°C
All specifications CLKIN = 3.58 MHz
V VDD = 3.3 V ± 10%
V VDD = 3.3 V ± 10%
VIN = 0 V
μA
μA
pF
VDD = 3.3 V ± 10%
V ISOURCE = 800 μA
V ISINK = 2 mA
For specified performance
V 3.3 V − 10%
V 3.3 V + 10%
mA
Rev. A | Page 5 of 68
5 Page 
Data Sheet
ADE7953
TYPICAL PERFORMANCE CHARACTERISTICS
1.0
0.8
–40°C
0.6 +25°C
+85°C
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0.01
0.1 1 10
CURRENT CHANNE L (% FULL SCALE)
100
Figure 5. Current Channel A Active Energy Error as a Percentage of Reading
(Gain = 1, Power Factor = 1) over Temperature with Internal Reference,
Integrator Off
1.0
0.8
PF = –0.5
0.6 PF = +0.5
PF = +1.0
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0.01
0.1 1 10
CURRENT CHANNE L (% FULL SCALE)
100
Figure 6. Current Channel A Active Energy Error as a Percentage of Reading
(Gain = 1, Temperature = 25°C) over Power Factor with Internal Reference,
Integrator Off
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0.01
–40°C
+25°C
+85°C
0.1 1 10
CURRENT CHANNE L (% FULL SCALE)
100
Figure 7. Current Channel A Active Energy Error as a Percentage of Reading
(Gain = 22, Power Factor = 1) over Temperature with Internal Reference,
Integrator Off
1.0
0.8
PF = –0.5
0.6 PF = +0.5
PF = +1.0
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0.01
0.1 1 10
CURRENT CHANNE L (% FULL SCALE)
100
Figure 8. Current Channel A Active Energy Error as a Percentage of Reading
(Gain = 22, Temperature = 25°C) over Power Factor with Internal Reference,
Integrator Off
1.0
0.8
VDD = 3.30V
0.6 VDD = 2.97V
VDD = 3.63V
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0.01
0.1 1 10
CURRENT CHANNE L (% FULL SCALE)
100
Figure 9. Current Channel A Active Energy Error as a Percentage of Reading
(Gain = 22, Temperature = 25°C, Power Factor = 1) over Supply Voltage
with Internal Reference, Integrator Off
1.0
0.8 PF = –0.5
PF = +0.5
0.6 PF = +1.0
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
– 1.0
45
50 55 60
FREQUENCY (Hz)
65
Figure 10. Current Channel A Active Energy Error as a Percentage of Reading
(Gain = 22, Temperature = 25°C) over Frequency and Power Factor
with Internal Reference, Integrator Off
Rev. A | Page 11 of 68
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADE7953.PDF ] | |
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